diff options
| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2017-03-25 01:48:08 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-25 20:14:40 -0700 |
| commit | 6ac3b77a6ffff7513ff86b684aa256ea01c0e5b5 (patch) | |
| tree | 2ac956b31729a81f5d30a92ad640a709bd2d0297 /drivers/net/irda/vlsi_ir.c | |
| parent | 834a61d455ff8069552f44140b2c1de85e6bc84d (diff) | |
irda: vlsi_ir: fix check for DMA mapping errors
vlsi_alloc_ring() checks for DMA mapping errors by comparing
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/irda/vlsi_ir.c')
| -rw-r--r-- | drivers/net/irda/vlsi_ir.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c index ffedad2a360a..15b920086251 100644 --- a/drivers/net/irda/vlsi_ir.c +++ b/drivers/net/irda/vlsi_ir.c @@ -418,8 +418,9 @@ static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr memset(rd, 0, sizeof(*rd)); rd->hw = hwmap + i; rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); - if (rd->buf == NULL || - !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { + if (rd->buf) + busaddr = pci_map_single(pdev, rd->buf, len, dir); + if (rd->buf == NULL || pci_dma_mapping_error(pdev, busaddr)) { if (rd->buf) { net_err_ratelimited("%s: failed to create PCI-MAP for %p\n", __func__, rd->buf); @@ -430,8 +431,7 @@ static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr rd = r->rd + j; busaddr = rd_get_addr(rd); rd_set_addr_status(rd, 0, 0); - if (busaddr) - pci_unmap_single(pdev, busaddr, len, dir); + pci_unmap_single(pdev, busaddr, len, dir); kfree(rd->buf); rd->buf = NULL; } |