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| author | Dave Jiang | 2012-04-05 01:10:35 +0200 |
|---|---|---|
| committer | Dan Williams | 2012-04-06 00:22:58 +0200 |
| commit | 21b764e075e74f8af90da9f623aa3e2167484687 (patch) | |
| tree | 4ecbcdb82fdc3790d646bcd64b4cb5b481d1ad44 /drivers/dma/ioat/dma_v2.h | |
| parent | iop-adma: Corrected array overflow in RAID6 Xscale(R) test. (diff) | |
| download | kernel-qcow2-linux-21b764e075e74f8af90da9f623aa3e2167484687.tar.gz kernel-qcow2-linux-21b764e075e74f8af90da9f623aa3e2167484687.tar.xz kernel-qcow2-linux-21b764e075e74f8af90da9f623aa3e2167484687.zip | |
ioat: ring size variables need to be 32bit to avoid overflow
The alloc order can be up to 16 and 1 << 16 will over flow the 16bit
integer. Change the appropriate variables to 16bit to avoid overflow.
Reported-by: Jim Harris <james.r.harris@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ioat/dma_v2.h')
| -rw-r--r-- | drivers/dma/ioat/dma_v2.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h index a2c413b2b8d8..be2a55b95c23 100644 --- a/drivers/dma/ioat/dma_v2.h +++ b/drivers/dma/ioat/dma_v2.h @@ -74,7 +74,7 @@ static inline struct ioat2_dma_chan *to_ioat2_chan(struct dma_chan *c) return container_of(chan, struct ioat2_dma_chan, base); } -static inline u16 ioat2_ring_size(struct ioat2_dma_chan *ioat) +static inline u32 ioat2_ring_size(struct ioat2_dma_chan *ioat) { return 1 << ioat->alloc_order; } @@ -91,7 +91,7 @@ static inline u16 ioat2_ring_pending(struct ioat2_dma_chan *ioat) return CIRC_CNT(ioat->head, ioat->issued, ioat2_ring_size(ioat)); } -static inline u16 ioat2_ring_space(struct ioat2_dma_chan *ioat) +static inline u32 ioat2_ring_space(struct ioat2_dma_chan *ioat) { return ioat2_ring_size(ioat) - ioat2_ring_active(ioat); } |