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dma: mv_xor: fix error handling for clocks

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When a channel fails to initialize, we release all ressources,
including clocks. However, a XOR unit is not necessarily associated to
a clock (some variants of Marvell SoCs have a clock for XOR units,
some don't), so we shouldn't unconditionally be releasing the clock.

Instead, just like we do in the mv_xor_remove() function, we should
check if one clock was found before releasing it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni 2013-01-06 11:10:44 +01:00 committed by Jason Cooper
parent ab6e439fd0
commit dab9206445
1 changed files with 5 additions and 2 deletions
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7
drivers/dma/mv_xor.c
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@ -1366,8 +1366,11 @@ static int mv_xor_probe(struct platform_device *pdev)
irq_dispose_mapping(xordev->channels[i]->irq);
}
clk_disable_unprepare(xordev->clk);
clk_put(xordev->clk);
if (!IS_ERR(xordev->clk)) {
clk_disable_unprepare(xordev->clk);
clk_put(xordev->clk);
}
return ret;
}