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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2012-11-22 18:22:59 +0100
committerThomas Petazzoni <thomas.petazzoni@free-electrons.com>2012-11-22 18:22:59 +0100
commit73d9cdca1ced6ab32be363b58699039bd82b062a (patch)
tree72abb106516adf991b941b97ea4ed53c3294a8e9 /drivers/dma/mv_xor.c
parentdma: mv_xor: fix error checking of irq_of_parse_and_map() (diff)
downloadlinux-73d9cdca1ced6ab32be363b58699039bd82b062a.tar.xz
linux-73d9cdca1ced6ab32be363b58699039bd82b062a.zip
dma: mv_xor: fix error handling path
The ->probe() function of the mv_xor function contains in its error handling code a loop to cleanup the XOR channels that had been successfully initialized if some other XOR channel fails to be initialized. It does that by traveling the list of XOR channels, and cleanup those for which the pointer is not NULL. However, since the mv_xor_channel_add() function return a PTR_ERR style value, the pointer is not NULL on error. So, when handling the error of a given channel initialization, we cleanup this channel initialization and mark this channel entry as NULL in the array. This allows the remaining of the cleanup (for other channels) to work properly. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'drivers/dma/mv_xor.c')
-rw-r--r--drivers/dma/mv_xor.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index f2edd6a5536e..9659e58fc8b2 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1322,6 +1322,7 @@ static int __devinit mv_xor_probe(struct platform_device *pdev)
cap_mask, irq);
if (IS_ERR(xordev->channels[i])) {
ret = PTR_ERR(xordev->channels[i]);
+ xordev->channels[i] = NULL;
irq_dispose_mapping(irq);
goto err_channel_add;
}