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ARM: PL08x: fix a leak when preparing TXDs 

If we fail to allocate the LLI, the prep_* function will return NULL.
However, the TXD we allocated will not be placed on any list, nor
will it be freed - we'll just drop all references to it.  Make sure
we free it rather than leaking TXDs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Russell King - ARM Linux 2011-01-03 22:31:45 +00:00 committed by Dan Williams
parent bf072af461
commit dafa73171b
1 changed files with 3 additions and 2 deletions
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5
drivers/dma/amba-pl08x.c
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@ -1332,9 +1332,10 @@ static int pl08x_prep_channel_resources(struct pl08x_dma_chan *plchan,
int ret; int ret;
num_llis = pl08x_fill_llis_for_desc(pl08x, txd); num_llis = pl08x_fill_llis_for_desc(pl08x, txd);
if (!num_llis) {
if (!num_llis) kfree(txd);
return -EINVAL; return -EINVAL;
}
spin_lock_irqsave(&plchan->lock, plchan->lockflags); spin_lock_irqsave(&plchan->lock, plchan->lockflags);