diff options
| author | Arend van Spriel <arend@broadcom.com> | 2011-10-29 11:30:15 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-11-07 13:19:13 -0500 |
| commit | ae8e46723f803057daff392bdc93332be2f0ec98 (patch) | |
| tree | b34000a231b79a8012cc51ba9d385a6c6621bf4c /drivers | |
| parent | 73d51f38c736ae286372e90056a7f31519f555ac (diff) | |
| download | linux-stable-ae8e46723f803057daff392bdc93332be2f0ec98.tar.gz linux-stable-ae8e46723f803057daff392bdc93332be2f0ec98.tar.bz2 linux-stable-ae8e46723f803057daff392bdc93332be2f0ec98.zip | |
brcm80211: smac: eliminate a null pointer dereference in dma.c
Though it's unlikely, di may be null, so we can't dereference
di->dma.dmactrlflags until we've checked it.
Move this de-reference after the check, and adjust the error
message to not require de-referencing di.
This is based upon Julia's original patch:
<1319846297-2985-2-git-send-email-julia@diku.dk>
Reported-by: Julia Lawall <julia@diku.dk>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/dma.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c index b56a30297c26..6ebec8f42846 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c @@ -358,13 +358,14 @@ static uint nrxdactive(struct dma_info *di, uint h, uint t) static uint _dma_ctrlflags(struct dma_info *di, uint mask, uint flags) { - uint dmactrlflags = di->dma.dmactrlflags; + uint dmactrlflags; if (di == NULL) { - DMA_ERROR(("%s: _dma_ctrlflags: NULL dma handle\n", di->name)); + DMA_ERROR(("_dma_ctrlflags: NULL dma handle\n")); return 0; } + dmactrlflags = di->dma.dmactrlflags; dmactrlflags &= ~mask; dmactrlflags |= flags; |