[Xen-changelog] [xen-unstable] ACPI: Remove a redundant call to acpi_hw_register_read().

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1220442359 -3600
# Node ID a4cf79209a28ccd22473a99c0dc258027b262508
# Parent  021189f8cd784755d9b45ab5e9b947cc38b37f2b
ACPI: Remove a redundant call to acpi_hw_register_read().

Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
---
 xen/drivers/acpi/hwregs.c |    2 ++
 1 files changed, 2 insertions(+)

diff -r 021189f8cd78 -r a4cf79209a28 xen/drivers/acpi/hwregs.c
--- a/xen/drivers/acpi/hwregs.c Wed Sep 03 11:02:57 2008 +0100
+++ b/xen/drivers/acpi/hwregs.c Wed Sep 03 12:45:59 2008 +0100
@@ -239,11 +239,13 @@ acpi_status acpi_set_register(u32 regist
 
        case ACPI_REGISTER_PM2_CONTROL:
 
+#if 0 /* Redundant read in original Linux code. */
                status = acpi_hw_register_read(ACPI_REGISTER_PM2_CONTROL,
                                               &register_value);
                if (ACPI_FAILURE(status)) {
                        goto unlock_and_exit;
                }
+#endif
 
                ACPI_DEBUG_PRINT((ACPI_DB_IO,
                                  "PM2 control: Read %X from %8.8X%8.8X\n",

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