26 lines
688 B
Plaintext
26 lines
688 B
Plaintext
From: Jeff Mahoney <jeffm@suse.com>
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Subject: dmar: Fix oops with no DMAR table
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References: bnc#548108
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Patch-mainline: submitted 17 Mar 2010
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On systems without a DMAR table and with DMAR enabled, we will oops
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in dmar_ir_supported. This patch makes sure we actually have a DMAR
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table before checking it.
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Signed-off-by: Jeff Mahoney <jeffm@suse.com>
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---
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drivers/pci/dmar.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/pci/dmar.c
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+++ b/drivers/pci/dmar.c
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@@ -1460,5 +1460,5 @@ int __init dmar_ir_support(void)
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{
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struct acpi_table_dmar *dmar;
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dmar = (struct acpi_table_dmar *)dmar_tbl;
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- return dmar->flags & 0x1;
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+ return dmar && dmar->flags & 0x1;
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}
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