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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2017-03-25 01:48:08 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-26 06:14:40 +0300
commit6ac3b77a6ffff7513ff86b684aa256ea01c0e5b5 (patch)
tree2ac956b31729a81f5d30a92ad640a709bd2d0297 /drivers/net
parent834a61d455ff8069552f44140b2c1de85e6bc84d (diff)
downloadlinux-6ac3b77a6ffff7513ff86b684aa256ea01c0e5b5.tar.xz
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')
-rw-r--r--drivers/net/irda/vlsi_ir.c8
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;
}