[patch V3 11/35] bus: fsl-mc-msi: Allocate MSI device data on first use

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Allocate the MSI device data on first invocation of the allocation function.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Stuart Yoder <stuyoder@xxxxxxxxx>
Cc: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>
---
 drivers/bus/fsl-mc/fsl-mc-msi.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/bus/fsl-mc/fsl-mc-msi.c
+++ b/drivers/bus/fsl-mc/fsl-mc-msi.c
@@ -253,6 +253,14 @@ int fsl_mc_msi_domain_alloc_irqs(struct
        struct irq_domain *msi_domain;
        int error;
 
+       msi_domain = dev_get_msi_domain(dev);
+       if (!msi_domain)
+               return -EINVAL;
+
+       error = msi_setup_device_data(dev);
+       if (error)
+               return error;
+
        if (!list_empty(dev_to_msi_list(dev)))
                return -EINVAL;
 
@@ -260,12 +268,6 @@ int fsl_mc_msi_domain_alloc_irqs(struct
        if (error < 0)
                return error;
 
-       msi_domain = dev_get_msi_domain(dev);
-       if (!msi_domain) {
-               error = -EINVAL;
-               goto cleanup_msi_descs;
-       }
-
        /*
         * NOTE: Calling this function will trigger the invocation of the
         * its_fsl_mc_msi_prepare() callback