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[PATCH v1 4/5] PCI: Adapt all code locations to not use struct pci_dev::driver directly



This prepares removing the driver member of struct pci_dev which holds the
same information than struct pci_dev::dev->driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
 arch/powerpc/include/asm/ppc-pci.h            |  3 +-
 arch/powerpc/kernel/eeh_driver.c              | 12 ++++---
 arch/x86/events/intel/uncore.c                |  2 +-
 arch/x86/kernel/probe_roms.c                  |  2 +-
 drivers/bcma/host_pci.c                       |  6 ++--
 drivers/crypto/hisilicon/qm.c                 |  2 +-
 drivers/crypto/qat/qat_common/adf_aer.c       |  2 +-
 drivers/message/fusion/mptbase.c              |  4 +--
 drivers/misc/cxl/guest.c                      | 21 +++++------
 drivers/misc/cxl/pci.c                        | 25 +++++++------
 .../ethernet/hisilicon/hns3/hns3_ethtool.c    |  3 +-
 .../ethernet/marvell/prestera/prestera_pci.c  |  2 +-
 drivers/net/ethernet/mellanox/mlxsw/pci.c     |  2 +-
 .../ethernet/netronome/nfp/nfp_net_ethtool.c  |  2 +-
 drivers/pci/iov.c                             | 23 +++++++-----
 drivers/pci/pci-driver.c                      | 28 ++++++++-------
 drivers/pci/pci.c                             | 10 +++---
 drivers/pci/pcie/err.c                        | 35 ++++++++++---------
 drivers/pci/xen-pcifront.c                    |  4 +--
 drivers/ssb/pcihost_wrapper.c                 |  7 ++--
 drivers/usb/host/xhci-pci.c                   |  3 +-
 21 files changed, 113 insertions(+), 85 deletions(-)

diff --git a/arch/powerpc/include/asm/ppc-pci.h 
b/arch/powerpc/include/asm/ppc-pci.h
index 2b9edbf6e929..63938c156c57 100644
--- a/arch/powerpc/include/asm/ppc-pci.h
+++ b/arch/powerpc/include/asm/ppc-pci.h
@@ -57,7 +57,8 @@ void eeh_sysfs_remove_device(struct pci_dev *pdev);
 
 static inline const char *eeh_driver_name(struct pci_dev *pdev)
 {
-       return (pdev && pdev->driver) ? pdev->driver->name : "<null>";
+       struct pci_driver *pdrv;
+       return (pdev && (pdrv = pci_driver_of_dev(pdev))) ? pdrv->name : 
"<null>";
 }
 
 #endif /* CONFIG_EEH */
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 3eff6a4888e7..0fc712a8775e 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -104,13 +104,14 @@ static bool eeh_edev_actionable(struct eeh_dev *edev)
  */
 static inline struct pci_driver *eeh_pcid_get(struct pci_dev *pdev)
 {
-       if (!pdev || !pdev->driver)
+       struct pci_driver *pdrv;
+       if (!pdev || !(pdrv = pci_driver_of_dev(pdev)))
                return NULL;
 
-       if (!try_module_get(pdev->driver->driver.owner))
+       if (!try_module_get(pdrv->driver.owner))
                return NULL;
 
-       return pdev->driver;
+       return pdrv;
 }
 
 /**
@@ -122,10 +123,11 @@ static inline struct pci_driver *eeh_pcid_get(struct 
pci_dev *pdev)
  */
 static inline void eeh_pcid_put(struct pci_dev *pdev)
 {
-       if (!pdev || !pdev->driver)
+       struct pci_driver *pdrv;
+       if (!pdev || !(pdrv = pci_driver_of_dev(pdev)))
                return;
 
-       module_put(pdev->driver->driver.owner);
+       module_put(pdrv->driver.owner);
 }
 
 /**
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 9bf4dbbc26e2..14eb141b6cf2 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1176,7 +1176,7 @@ static int uncore_pci_probe(struct pci_dev *pdev, const 
struct pci_device_id *id
         * PCI slot and func to indicate the uncore box.
         */
        if (id->driver_data & ~0xffff) {
-               struct pci_driver *pci_drv = pdev->driver;
+               struct pci_driver *pci_drv = pci_driver_of_dev(pdev);
 
                pmu = uncore_pci_find_dev_pmu(pdev, pci_drv->id_table);
                if (pmu == NULL)
diff --git a/arch/x86/kernel/probe_roms.c b/arch/x86/kernel/probe_roms.c
index 9e1def3744f2..55bfafec9684 100644
--- a/arch/x86/kernel/probe_roms.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -80,7 +80,7 @@ static struct resource video_rom_resource = {
  */
 static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned 
short device)
 {
-       struct pci_driver *drv = pdev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pdev);
        const struct pci_device_id *id;
 
        if (pdev->vendor == vendor && pdev->device == device)
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
index 69c10a7b7c61..f9bfae87ebd9 100644
--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -161,6 +161,7 @@ static int bcma_host_pci_probe(struct pci_dev *dev,
                               const struct pci_device_id *id)
 {
        struct bcma_bus *bus;
+       struct pci_driver *pdrv;
        int err = -ENOMEM;
        const char *name;
        u32 val;
@@ -176,8 +177,9 @@ static int bcma_host_pci_probe(struct pci_dev *dev,
                goto err_kfree_bus;
 
        name = dev_name(&dev->dev);
-       if (dev->driver && dev->driver->name)
-               name = dev->driver->name;
+       pdrv = pci_driver_of_dev(dev);
+       if (pdrv && pdrv->name)
+               name = pdrv->name;
        err = pci_request_regions(dev, name);
        if (err)
                goto err_pci_disable;
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 1d67f94a1d56..303cc546f466 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3003,7 +3003,7 @@ static int qm_alloc_uacce(struct hisi_qm *qm)
        };
        int ret;
 
-       ret = strscpy(interface.name, pdev->driver->name,
+       ret = strscpy(interface.name, pci_driver_of_dev(pdev)->name,
                      sizeof(interface.name));
        if (ret < 0)
                return -ENAMETOOLONG;
diff --git a/drivers/crypto/qat/qat_common/adf_aer.c 
b/drivers/crypto/qat/qat_common/adf_aer.c
index d2ae293d0df6..162c2b9ef93d 100644
--- a/drivers/crypto/qat/qat_common/adf_aer.c
+++ b/drivers/crypto/qat/qat_common/adf_aer.c
@@ -185,7 +185,7 @@ static const struct pci_error_handlers adf_err_handler = {
 int adf_enable_aer(struct adf_accel_dev *accel_dev)
 {
        struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
-       struct pci_driver *pdrv = pdev->driver;
+       struct pci_driver *pdrv = pci_driver_of_dev(pdev);
 
        pdrv->err_handler = &adf_err_handler;
        pci_enable_pcie_error_reporting(pdev);
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 7f7abc9069f7..181e2927a719 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -838,8 +838,8 @@ mpt_device_driver_register(struct mpt_pci_driver * 
dd_cbfunc, u8 cb_idx)
 
        /* call per pci device probe entry point */
        list_for_each_entry(ioc, &ioc_list, list) {
-               id = ioc->pcidev->driver ?
-                   ioc->pcidev->driver->id_table : NULL;
+               struct pci_driver *pdrv = pci_driver_of_dev(ioc->pcidev);
+               id = pdrv ?  pdrv->id_table : NULL;
                if (dd_cbfunc->probe)
                        dd_cbfunc->probe(ioc->pcidev, id);
         }
diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index 186308f1f8eb..99b969b182b5 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -25,28 +25,29 @@ static void pci_error_handlers(struct cxl_afu *afu,
                return;
 
        list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
-               if (!afu_dev->driver)
+               struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+               if (!afu_drv)
                        continue;
 
                switch (bus_error_event) {
                case CXL_ERROR_DETECTED_EVENT:
                        afu_dev->error_state = state;
 
-                       if (afu_dev->driver->err_handler &&
-                           afu_dev->driver->err_handler->error_detected)
-                               
afu_dev->driver->err_handler->error_detected(afu_dev, state);
+                       if (afu_drv->err_handler &&
+                           afu_drv->err_handler->error_detected)
+                               afu_drv->err_handler->error_detected(afu_dev, 
state);
                break;
                case CXL_SLOT_RESET_EVENT:
                        afu_dev->error_state = state;
 
-                       if (afu_dev->driver->err_handler &&
-                           afu_dev->driver->err_handler->slot_reset)
-                               
afu_dev->driver->err_handler->slot_reset(afu_dev);
+                       if (afu_drv->err_handler &&
+                           afu_drv->err_handler->slot_reset)
+                               afu_drv->err_handler->slot_reset(afu_dev);
                break;
                case CXL_RESUME_EVENT:
-                       if (afu_dev->driver->err_handler &&
-                           afu_dev->driver->err_handler->resume)
-                               afu_dev->driver->err_handler->resume(afu_dev);
+                       if (afu_drv->err_handler &&
+                           afu_drv->err_handler->resume)
+                               afu_drv->err_handler->resume(afu_dev);
                break;
                }
        }
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 2ba899f5659f..1cf39275029f 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1805,13 +1805,14 @@ static pci_ers_result_t cxl_vphb_error_detected(struct 
cxl_afu *afu,
                return result;
 
        list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
-               if (!afu_dev->driver)
+               struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+               if (!afu_drv)
                        continue;
 
                afu_dev->error_state = state;
 
-               if (afu_dev->driver->err_handler)
-                       afu_result = 
afu_dev->driver->err_handler->error_detected(afu_dev,
+               if (afu_drv->err_handler)
+                       afu_result = 
afu_drv->err_handler->error_detected(afu_dev,
                                                                                
  state);
                /* Disconnect trumps all, NONE trumps NEED_RESET */
                if (afu_result == PCI_ERS_RESULT_DISCONNECT)
@@ -2003,6 +2004,8 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev 
*pdev)
                        continue;
 
                list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) 
{
+                       struct pci_driver *afu_drv;
+
                        /* Reset the device context.
                         * TODO: make this less disruptive
                         */
@@ -2028,12 +2031,13 @@ static pci_ers_result_t cxl_pci_slot_reset(struct 
pci_dev *pdev)
                         * shouldn't start new work until we call
                         * their resume function.
                         */
-                       if (!afu_dev->driver)
+                       afu_drv = pci_driver_of_dev(afu_dev);
+                       if (!afu_drv)
                                continue;
 
-                       if (afu_dev->driver->err_handler &&
-                           afu_dev->driver->err_handler->slot_reset)
-                               afu_result = 
afu_dev->driver->err_handler->slot_reset(afu_dev);
+                       if (afu_drv->err_handler &&
+                           afu_drv->err_handler->slot_reset)
+                               afu_result = 
afu_drv->err_handler->slot_reset(afu_dev);
 
                        if (afu_result == PCI_ERS_RESULT_DISCONNECT)
                                result = PCI_ERS_RESULT_DISCONNECT;
@@ -2074,9 +2078,10 @@ static void cxl_pci_resume(struct pci_dev *pdev)
                        continue;
 
                list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) 
{
-                       if (afu_dev->driver && afu_dev->driver->err_handler &&
-                           afu_dev->driver->err_handler->resume)
-                               afu_dev->driver->err_handler->resume(afu_dev);
+                       struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+                       if (afu_drv && afu_drv->err_handler &&
+                           afu_drv->err_handler->resume)
+                               afu_drv->err_handler->resume(afu_dev);
                }
        }
        spin_unlock(&adapter->afu_list_lock);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c 
b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 82061ab6930f..833d35e9ed4a 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -593,8 +593,7 @@ static void hns3_get_drvinfo(struct net_device *netdev,
                return;
        }
 
-       strncpy(drvinfo->driver, h->pdev->driver->name,
-               sizeof(drvinfo->driver));
+       strncpy(drvinfo->driver, pci_driver_of_dev(h->pdev)->name, 
sizeof(drvinfo->driver));
        drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
 
        strncpy(drvinfo->bus_info, pci_name(h->pdev),
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c 
b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
index a250d394da38..180999c2165e 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
@@ -720,7 +720,7 @@ static int prestera_fw_load(struct prestera_fw *fw)
 static int prestera_pci_probe(struct pci_dev *pdev,
                              const struct pci_device_id *id)
 {
-       const char *driver_name = pdev->driver->name;
+       const char *driver_name = pci_driver_of_dev(pdev)->name;
        struct prestera_fw *fw;
        int err;
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c 
b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 13b0259f7ea6..d3c1ca840fa7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1876,7 +1876,7 @@ static void mlxsw_pci_cmd_fini(struct mlxsw_pci 
*mlxsw_pci)
 
 static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id 
*id)
 {
-       const char *driver_name = pdev->driver->name;
+       const char *driver_name = pci_driver_of_dev(pdev)->name;
        struct mlxsw_pci *mlxsw_pci;
        int err;
 
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c 
b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 1b482446536d..5c25f6af3f62 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -202,7 +202,7 @@ nfp_get_drvinfo(struct nfp_app *app, struct pci_dev *pdev,
 {
        char nsp_version[ETHTOOL_FWVERS_LEN] = {};
 
-       strlcpy(drvinfo->driver, pdev->driver->name, sizeof(drvinfo->driver));
+       strlcpy(drvinfo->driver, pci_driver_of_dev(pdev)->name, 
sizeof(drvinfo->driver));
        nfp_net_get_nspinfo(app, nsp_version);
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
                 "%s %s %s %s", vnic_version, nsp_version,
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index dafdc652fcd0..7c6f0c466df8 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -164,13 +164,14 @@ static ssize_t sriov_vf_total_msix_show(struct device 
*dev,
                                        char *buf)
 {
        struct pci_dev *pdev = to_pci_dev(dev);
+       struct pci_driver *pdrv = pci_driver_of_dev(pdev);
        u32 vf_total_msix = 0;
 
        device_lock(dev);
-       if (!pdev->driver || !pdev->driver->sriov_get_vf_total_msix)
+       if (!pdrv || !pdrv->sriov_get_vf_total_msix)
                goto unlock;
 
-       vf_total_msix = pdev->driver->sriov_get_vf_total_msix(pdev);
+       vf_total_msix = pdrv->sriov_get_vf_total_msix(pdev);
 unlock:
        device_unlock(dev);
        return sysfs_emit(buf, "%u\n", vf_total_msix);
@@ -183,6 +184,7 @@ static ssize_t sriov_vf_msix_count_store(struct device *dev,
 {
        struct pci_dev *vf_dev = to_pci_dev(dev);
        struct pci_dev *pdev = pci_physfn(vf_dev);
+       struct pci_driver *pdrv;
        int val, ret;
 
        ret = kstrtoint(buf, 0, &val);
@@ -193,13 +195,14 @@ static ssize_t sriov_vf_msix_count_store(struct device 
*dev,
                return -EINVAL;
 
        device_lock(&pdev->dev);
-       if (!pdev->driver || !pdev->driver->sriov_set_msix_vec_count) {
+       pdrv = pci_driver_of_dev(pdev);
+       if (!pdrv || !pdrv->sriov_set_msix_vec_count) {
                ret = -EOPNOTSUPP;
                goto err_pdev;
        }
 
        device_lock(&vf_dev->dev);
-       if (vf_dev->driver) {
+       if (pci_driver_of_dev(vf_dev)) {
                /*
                 * A driver is already attached to this VF and has configured
                 * itself based on the current MSI-X vector count. Changing
@@ -209,7 +212,7 @@ static ssize_t sriov_vf_msix_count_store(struct device *dev,
                goto err_dev;
        }
 
-       ret = pdev->driver->sriov_set_msix_vec_count(vf_dev, val);
+       ret = pdrv->sriov_set_msix_vec_count(vf_dev, val);
 
 err_dev:
        device_unlock(&vf_dev->dev);
@@ -376,6 +379,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
                                  const char *buf, size_t count)
 {
        struct pci_dev *pdev = to_pci_dev(dev);
+       struct pci_driver *pdrv;
        int ret;
        u16 num_vfs;
 
@@ -392,14 +396,15 @@ static ssize_t sriov_numvfs_store(struct device *dev,
                goto exit;
 
        /* is PF driver loaded */
-       if (!pdev->driver) {
+       pdrv = pci_driver_of_dev(pdev);
+       if (!pdrv) {
                pci_info(pdev, "no driver bound to device; cannot configure 
SR-IOV\n");
                ret = -ENOENT;
                goto exit;
        }
 
        /* is PF driver loaded w/callback */
-       if (!pdev->driver->sriov_configure) {
+       if (!pdrv->sriov_configure) {
                pci_info(pdev, "driver does not support SR-IOV configuration 
via sysfs\n");
                ret = -ENOENT;
                goto exit;
@@ -407,7 +412,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
 
        if (num_vfs == 0) {
                /* disable VFs */
-               ret = pdev->driver->sriov_configure(pdev, 0);
+               ret = pdrv->sriov_configure(pdev, 0);
                goto exit;
        }
 
@@ -419,7 +424,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
                goto exit;
        }
 
-       ret = pdev->driver->sriov_configure(pdev, num_vfs);
+       ret = pdrv->sriov_configure(pdev, num_vfs);
        if (ret < 0)
                goto exit;
 
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 7dff574bb2fa..740d5bf5d411 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -443,7 +443,7 @@ static int pci_device_probe(struct device *dev)
 static int pci_device_remove(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
-       struct pci_driver *drv = pci_dev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pci_dev);
 
        if (drv->remove) {
                pm_runtime_get_sync(dev);
@@ -480,7 +480,7 @@ static int pci_device_remove(struct device *dev)
 static void pci_device_shutdown(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
-       struct pci_driver *drv = pci_dev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pci_dev);
 
        pm_runtime_resume(dev);
 
@@ -576,7 +576,7 @@ static int pci_pm_reenable_device(struct pci_dev *pci_dev)
 static int pci_legacy_suspend(struct device *dev, pm_message_t state)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
-       struct pci_driver *drv = pci_dev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pci_dev);
 
        if (drv && drv->suspend) {
                pci_power_t prev = pci_dev->current_state;
@@ -617,7 +617,7 @@ static int pci_legacy_suspend_late(struct device *dev, 
pm_message_t state)
 static int pci_legacy_resume(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
-       struct pci_driver *drv = pci_dev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pci_dev);
 
        pci_fixup_device(pci_fixup_resume, pci_dev);
 
@@ -636,7 +636,7 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev)
 
 static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
 {
-       struct pci_driver *drv = pci_dev->driver;
+       struct pci_driver *drv = pci_driver_of_dev(pci_dev);
        bool ret = drv && (drv->suspend || drv->resume);
 
        /*
@@ -1224,16 +1224,17 @@ static int pci_pm_restore(struct device *dev)
 static int pci_pm_runtime_suspend(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
+       struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
        const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
        pci_power_t prev = pci_dev->current_state;
        int error;
 
        /*
-        * If pci_dev->driver is not set (unbound), we leave the device in D0,
+        * If pdrv is not set (unbound), we leave the device in D0,
         * but it may go to D3cold when the bridge above it runtime suspends.
         * Save its config space in case that happens.
         */
-       if (!pci_dev->driver) {
+       if (!pdrv) {
                pci_save_state(pci_dev);
                return 0;
        }
@@ -1279,6 +1280,7 @@ static int pci_pm_runtime_suspend(struct device *dev)
 static int pci_pm_runtime_resume(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
+       struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
        const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
        pci_power_t prev_state = pci_dev->current_state;
        int error = 0;
@@ -1290,7 +1292,7 @@ static int pci_pm_runtime_resume(struct device *dev)
         */
        pci_restore_standard_config(pci_dev);
 
-       if (!pci_dev->driver)
+       if (!pdrv)
                return 0;
 
        pci_fixup_device(pci_fixup_resume_early, pci_dev);
@@ -1310,13 +1312,14 @@ static int pci_pm_runtime_resume(struct device *dev)
 static int pci_pm_runtime_idle(struct device *dev)
 {
        struct pci_dev *pci_dev = to_pci_dev(dev);
+       struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
        const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 
        /*
-        * If pci_dev->driver is not set (unbound), the device should
+        * If pdrv is not set (unbound), the device should
         * always remain in D0 regardless of the runtime PM status
         */
-       if (!pci_dev->driver)
+       if (!pdrv)
                return 0;
 
        if (!pm)
@@ -1423,8 +1426,9 @@ static struct pci_driver pci_compat_driver = {
  */
 struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
 {
-       if (dev->driver)
-               return dev->driver;
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
+       if (pdrv)
+               return pdrv;
        else {
                int i;
                for (i = 0; i <= PCI_ROM_RESOURCE; i++)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index aacf575c15cf..9565f6c1bd4f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5069,11 +5069,12 @@ EXPORT_SYMBOL_GPL(pci_dev_unlock);
 
 static void pci_dev_save_and_disable(struct pci_dev *dev)
 {
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
        const struct pci_error_handlers *err_handler =
-                       dev->driver ? dev->driver->err_handler : NULL;
+                       pdrv ? pdrv->err_handler : NULL;
 
        /*
-        * dev->driver->err_handler->reset_prepare() is protected against
+        * pdrv->err_handler->reset_prepare() is protected against
         * races with ->remove() by the device lock, which must be held by
         * the caller.
         */
@@ -5100,13 +5101,14 @@ static void pci_dev_save_and_disable(struct pci_dev 
*dev)
 
 static void pci_dev_restore(struct pci_dev *dev)
 {
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
        const struct pci_error_handlers *err_handler =
-                       dev->driver ? dev->driver->err_handler : NULL;
+                       pdrv ? pdrv->err_handler : NULL;
 
        pci_restore_state(dev);
 
        /*
-        * dev->driver->err_handler->reset_done() is protected against
+        * err_handler->reset_done() is protected against
         * races with ->remove() by the device lock, which must be held by
         * the caller.
         */
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index b576aa890c76..5b2b7b2972dd 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -51,12 +51,12 @@ static int report_error_detected(struct pci_dev *dev,
 {
        pci_ers_result_t vote;
        const struct pci_error_handlers *err_handler;
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
 
        device_lock(&dev->dev);
        if (!pci_dev_set_io_state(dev, state) ||
-               !dev->driver ||
-               !dev->driver->err_handler ||
-               !dev->driver->err_handler->error_detected) {
+               !pdrv || !pdrv->err_handler ||
+               !pdrv->err_handler->error_detected) {
                /*
                 * If any device in the subtree does not have an error_detected
                 * callback, PCI_ERS_RESULT_NO_AER_DRIVER prevents subsequent
@@ -70,7 +70,7 @@ static int report_error_detected(struct pci_dev *dev,
                        vote = PCI_ERS_RESULT_NONE;
                }
        } else {
-               err_handler = dev->driver->err_handler;
+               err_handler = pdrv->err_handler;
                vote = err_handler->error_detected(dev, state);
        }
        pci_uevent_ers(dev, vote);
@@ -93,14 +93,15 @@ static int report_mmio_enabled(struct pci_dev *dev, void 
*data)
 {
        pci_ers_result_t vote, *result = data;
        const struct pci_error_handlers *err_handler;
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
 
        device_lock(&dev->dev);
-       if (!dev->driver ||
-               !dev->driver->err_handler ||
-               !dev->driver->err_handler->mmio_enabled)
+       if (!pdrv ||
+               !pdrv->err_handler ||
+               !pdrv->err_handler->mmio_enabled)
                goto out;
 
-       err_handler = dev->driver->err_handler;
+       err_handler = pdrv->err_handler;
        vote = err_handler->mmio_enabled(dev);
        *result = merge_result(*result, vote);
 out:
@@ -112,14 +113,15 @@ static int report_slot_reset(struct pci_dev *dev, void 
*data)
 {
        pci_ers_result_t vote, *result = data;
        const struct pci_error_handlers *err_handler;
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
 
        device_lock(&dev->dev);
-       if (!dev->driver ||
-               !dev->driver->err_handler ||
-               !dev->driver->err_handler->slot_reset)
+       if (!pdrv ||
+               !pdrv->err_handler ||
+               !pdrv->err_handler->slot_reset)
                goto out;
 
-       err_handler = dev->driver->err_handler;
+       err_handler = pdrv->err_handler;
        vote = err_handler->slot_reset(dev);
        *result = merge_result(*result, vote);
 out:
@@ -130,15 +132,16 @@ static int report_slot_reset(struct pci_dev *dev, void 
*data)
 static int report_resume(struct pci_dev *dev, void *data)
 {
        const struct pci_error_handlers *err_handler;
+       struct pci_driver *pdrv = pci_driver_of_dev(dev);
 
        device_lock(&dev->dev);
        if (!pci_dev_set_io_state(dev, pci_channel_io_normal) ||
-               !dev->driver ||
-               !dev->driver->err_handler ||
-               !dev->driver->err_handler->resume)
+               !pdrv ||
+               !pdrv->err_handler ||
+               !pdrv->err_handler->resume)
                goto out;
 
-       err_handler = dev->driver->err_handler;
+       err_handler = pdrv->err_handler;
        err_handler->resume(dev);
 out:
        pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED);
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index b7a8f3a1921f..c80c57371dd8 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -599,12 +599,12 @@ static pci_ers_result_t pcifront_common_process(int cmd,
        result = PCI_ERS_RESULT_NONE;
 
        pcidev = pci_get_domain_bus_and_slot(domain, bus, devfn);
-       if (!pcidev || !pcidev->driver) {
+       pdrv = pci_driver_of_dev(pcidev);
+       if (!pcidev || !pdrv) {
                dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n");
                pci_dev_put(pcidev);
                return result;
        }
-       pdrv = pcidev->driver;
 
        if (pdrv) {
                if (pdrv->err_handler && pdrv->err_handler->error_detected) {
diff --git a/drivers/ssb/pcihost_wrapper.c b/drivers/ssb/pcihost_wrapper.c
index 410215c16920..229329b9e51c 100644
--- a/drivers/ssb/pcihost_wrapper.c
+++ b/drivers/ssb/pcihost_wrapper.c
@@ -68,6 +68,7 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
                             const struct pci_device_id *id)
 {
        struct ssb_bus *ssb;
+       struct pci_driver *pdrv;
        int err = -ENOMEM;
        const char *name;
        u32 val;
@@ -79,8 +80,10 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
        if (err)
                goto err_kfree_ssb;
        name = dev_name(&dev->dev);
-       if (dev->driver && dev->driver->name)
-               name = dev->driver->name;
+       
+       pdrv = pci_driver_of_dev(dev);
+       if (pdrv && pdrv->name)
+               name = pdrv->name;
        err = pci_request_regions(dev, name);
        if (err)
                goto err_pci_disable;
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 18c2bbddf080..d8a6ef602a46 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -100,10 +100,11 @@ static int xhci_pci_reinit(struct xhci_hcd *xhci, struct 
pci_dev *pdev)
 static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
        struct pci_dev                  *pdev = to_pci_dev(dev);
+       struct pci_driver               *pdrv = pci_driver_of_dev(pdev);
        struct xhci_driver_data         *driver_data;
        const struct pci_device_id      *id;
 
-       id = pci_match_id(pdev->driver->id_table, pdev);
+       id = pci_match_id(pdrv->id_table, pdev);
 
        if (id && id->driver_data) {
                driver_data = (struct xhci_driver_data *)id->driver_data;
-- 
2.30.2




 


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