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Subject[PATCH] mptsas: fix checks for dma mapping errors
Date
mptsas_smp_handler() checks for dma mapping errors by comparison
returned address with zero, while pci_dma_mapping_error() should be used.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
drivers/message/fusion/mptsas.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 7ebccfa8072a..7ee1667acde4 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -2281,7 +2281,7 @@ static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,

dma_addr_out = pci_map_single(ioc->pcidev, bio_data(req->bio),
blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
- if (!dma_addr_out)
+ if (pci_dma_mapping_error(ioc->pcidev, dma_addr_out))
goto put_mf;
ioc->add_sge(psge, flagsLength, dma_addr_out);
psge += ioc->SGE_size;
@@ -2296,7 +2296,7 @@ static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
flagsLength |= blk_rq_bytes(rsp) + 4;
dma_addr_in = pci_map_single(ioc->pcidev, bio_data(rsp->bio),
blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
- if (!dma_addr_in)
+ if (pci_dma_mapping_error(ioc->pcidev, dma_addr_in))
goto unmap;
ioc->add_sge(psge, flagsLength, dma_addr_in);

--
1.9.1
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