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net: eth: davicnci_cpdma: check dma map error

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Since the DMA mapping may fail the caller should check the return value.

Cc: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sebastian Siewior 2013-06-20 16:58:45 +02:00 committed by David S. Miller
parent db4e9b2b98
commit 14bd076955
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/ti/davinci_cpdma.c
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@ -705,6 +705,13 @@ int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
}
buffer = dma_map_single(ctlr->dev, data, len, chan->dir);
ret = dma_mapping_error(ctlr->dev, buffer);
if (ret) {
cpdma_desc_free(ctlr->pool, desc, 1);
ret = -EINVAL;
goto unlock_ret;
}
mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
cpdma_desc_to_port(chan, mode, directed);