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authorRafael J. Wysocki <rjw@sisk.pl>2008-10-24 21:50:31 +0200
committerLen Brown <len.brown@intel.com>2008-10-25 04:07:14 -0400
commitf8123381bae8d581d81f24b55719db3d9a6a262c (patch)
tree7dd46f965c6b72f4861017ffbbf42fefcdf370ce
parent92daa7b53b76984565dfdfda5d9c679884121fb2 (diff)
ACPI: Oops in ACPI with git latest
ACPI Warning (nseval-0168): Insufficient arguments - method [_OSC] needs 5, found 4 [20080926] ACPI Warning (nspredef-0252): \_SB_.PCI0._OSC: Parameter count mismatch - ASL declared 5, expected 4 [20080926] ACPI Error (nspredef-0163): \_SB_.PCI0._OSC: Missing expected return value [20080926] BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<c0237671>] acpi_run_osc+0xa1/0x170 Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/pci/pci-acpi.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index dfe7c8e1b185..b3a63edb6901 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -83,6 +83,9 @@ static acpi_status acpi_run_osc(acpi_handle handle,
if (ACPI_FAILURE(status))
return status;
+ if (!output.length)
+ return AE_NULL_OBJECT;
+
out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");