Building dma_v3.o triggers a GCC warning:
drivers/dma/ioat/dma_v3.c: In function ‘__ioat3_prep_pq16_lock’:
drivers/dma/ioat/dma_v3.c:264:11: warning: array subscript is below array
bounds [-Warray-bounds]
drivers/dma/ioat/dma_v3.c:264:11: warning: array subscript is below array
bounds [-Warray-bounds]
This warning is caused by pq16_set_src(). It uses "int idx" as an index
to an eight element array. Changing "idx" to "unsigned" silences this
warning. Apparently GCC can then determine that "idx" will never be
negative.
Signed-off-by: Paul Bolle <[email protected]>
---
0) v2: cut back to a one hunk change, as Dan suggested.
1) Still just compile tested.
drivers/dma/ioat/dma_v3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index b642e03..2bb4601 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -251,7 +251,7 @@ static bool is_bwd_noraid(struct pci_dev *pdev)
}
static void pq16_set_src(struct ioat_raw_descriptor *desc[3],
- dma_addr_t addr, u32 offset, u8 coef, int idx)
+ dma_addr_t addr, u32 offset, u8 coef, unsigned idx)
{
struct ioat_pq_descriptor *pq = (struct ioat_pq_descriptor *)desc[0];
struct ioat_pq16a_descriptor *pq16 =
--
1.8.1.4
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