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| author | mark gross <mgross@linux.intel.com> | 2008-02-08 04:18:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:24 -0800 |
| commit | d94afc6ccf6690b30ae112ec8101b3f10d50114e (patch) | |
| tree | f54fb1fe147861db876b99809ff1cd1a316c45c0 | |
| parent | f8bab73515ca5b392680bb033dceeb37b8463e95 (diff) | |
| download | linux-stable-d94afc6ccf6690b30ae112ec8101b3f10d50114e.tar.gz linux-stable-d94afc6ccf6690b30ae112ec8101b3f10d50114e.tar.bz2 linux-stable-d94afc6ccf6690b30ae112ec8101b3f10d50114e.zip | |
intel-iommu: fault_reason index cleanup
Fix an off by one bug in the fault reason string reporting function, and
clean up some of the code around this buglet.
[akpm@linux-foundation.org: cleanup]
Signed-off-by: mark gross <mgross@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/pci/intel-iommu.c | 11 | ||||
| -rw-r--r-- | include/linux/dmar.h | 2 |
2 files changed, 6 insertions, 7 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 585e188c1746..a4c3089f892a 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -745,7 +745,7 @@ static int iommu_disable_translation(struct intel_iommu *iommu) /* iommu interrupt handling. Most stuff are MSI-like. */ -static char *fault_reason_strings[] = +static const char *fault_reason_strings[] = { "Software", "Present bit in root entry is clear", @@ -760,14 +760,13 @@ static char *fault_reason_strings[] = "non-zero reserved fields in RTP", "non-zero reserved fields in CTP", "non-zero reserved fields in PTE", - "Unknown" }; #define MAX_FAULT_REASON_IDX (ARRAY_SIZE(fault_reason_strings) - 1) -char *dmar_get_fault_reason(u8 fault_reason) +const char *dmar_get_fault_reason(u8 fault_reason) { - if (fault_reason >= MAX_FAULT_REASON_IDX) - return fault_reason_strings[MAX_FAULT_REASON_IDX - 1]; + if (fault_reason > MAX_FAULT_REASON_IDX) + return "Unknown"; else return fault_reason_strings[fault_reason]; } @@ -825,7 +824,7 @@ void dmar_msi_read(int irq, struct msi_msg *msg) static int iommu_page_fault_do_one(struct intel_iommu *iommu, int type, u8 fault_reason, u16 source_id, u64 addr) { - char *reason; + const char *reason; reason = dmar_get_fault_reason(fault_reason); diff --git a/include/linux/dmar.h b/include/linux/dmar.h index ffb6439cb5e6..56c73b847551 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -28,7 +28,7 @@ #ifdef CONFIG_DMAR struct intel_iommu; -extern char *dmar_get_fault_reason(u8 fault_reason); +extern const char *dmar_get_fault_reason(u8 fault_reason); /* Can't use the common MSI interrupt functions * since DMAR is not a pci device |