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authorRalph Campbell <ralph.campbell@qlogic.com>2008-12-05 11:13:18 -0800
committerRoland Dreier <rolandd@cisco.com>2008-12-05 11:13:18 -0800
commit890fccb2427d53b48ab9d009fd87d55bcb173f62 (patch)
tree52d8f1bbb2dad19bb79c147beac3119fe0ae4ed8 /drivers
parentfab01fc56063dafcc083f481ac0f9e6b5a576dd6 (diff)
IB/ipath: Check return value of dma_map_single()
This fixes an obvious oversight where the return value is not checked for error. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_sdma.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_sdma.c b/drivers/infiniband/hw/ipath/ipath_sdma.c
index 284c9bca517..8e255adf5d9 100644
--- a/drivers/infiniband/hw/ipath/ipath_sdma.c
+++ b/drivers/infiniband/hw/ipath/ipath_sdma.c
@@ -698,10 +698,8 @@ retry:
addr = dma_map_single(&dd->pcidev->dev, tx->txreq.map_addr,
tx->map_len, DMA_TO_DEVICE);
- if (dma_mapping_error(&dd->pcidev->dev, addr)) {
- ret = -EIO;
- goto unlock;
- }
+ if (dma_mapping_error(&dd->pcidev->dev, addr))
+ goto ioerr;
dwoffset = tx->map_len >> 2;
make_sdma_desc(dd, sdmadesc, (u64) addr, dwoffset, 0);
@@ -741,6 +739,8 @@ retry:
dw = (len + 3) >> 2;
addr = dma_map_single(&dd->pcidev->dev, sge->vaddr, dw << 2,
DMA_TO_DEVICE);
+ if (dma_mapping_error(&dd->pcidev->dev, addr))
+ goto unmap;
make_sdma_desc(dd, sdmadesc, (u64) addr, dw, dwoffset);
/* SDmaUseLargeBuf has to be set in every descriptor */
if (tx->txreq.flags & IPATH_SDMA_TXREQ_F_USELARGEBUF)
@@ -798,7 +798,18 @@ retry:
list_add_tail(&tx->txreq.list, &dd->ipath_sdma_activelist);
if (tx->txreq.flags & IPATH_SDMA_TXREQ_F_VL15)
vl15_watchdog_enq(dd);
-
+ goto unlock;
+
+unmap:
+ while (tail != dd->ipath_sdma_descq_tail) {
+ if (!tail)
+ tail = dd->ipath_sdma_descq_cnt - 1;
+ else
+ tail--;
+ unmap_desc(dd, tail);
+ }
+ioerr:
+ ret = -EIO;
unlock:
spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags);
fail: