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misc: genwqe: Fix potential memory leak when pinning memory

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Fix a memory leak in the genwqe_pin_mem() error path as called by
ioctl GENWQE_PIN_MEM. In case there is an error encountered when
mapping memory, the already allocated dma_mapping struct needs to
be freed correctly.

Detected by Coverity: CID 1162606.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Engelmayer 2014-01-25 22:47:44 +01:00 committed by Greg Kroah-Hartman
parent d0f2a808b2
commit d913c7439a
1 changed files with 1 additions and 0 deletions
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drivers/misc/genwqe/card_dev.c
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@ -787,6 +787,7 @@ static int genwqe_pin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
if (rc != 0) {
dev_err(&pci_dev->dev,
"[%s] genwqe_user_vmap rc=%d\n", __func__, rc);
kfree(dma_map);
return rc;
}