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[arm]: tegra: dma: DMA error debugging.

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Print an error message when a DMA channel cannot be allocated.

Change-Id: I93a96851ac12c5ea66b2fb053033aa4260c2178a
Signed-off-by: Mike Corrigan <michael.corrigan@motorola.com>
This commit is contained in:
Mike Corrigan 2010-10-14 13:56:13 -05:00 committed by Colin Cross
parent 1785cb19f0
commit 43ca7cdda2
1 changed files with 4 additions and 2 deletions
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6
arch/arm/mach-tegra/dma.c
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@ -341,7 +341,7 @@ EXPORT_SYMBOL(tegra_dma_enqueue_req);
struct tegra_dma_channel *tegra_dma_allocate_channel(int mode)
{
int channel;
struct tegra_dma_channel *ch = NULL;;
struct tegra_dma_channel *ch = NULL;
mutex_lock(&tegra_dma_lock);
@ -351,8 +351,10 @@ struct tegra_dma_channel *tegra_dma_allocate_channel(int mode)
} else {
channel = find_first_zero_bit(channel_usage,
ARRAY_SIZE(dma_channels));
if (channel >= ARRAY_SIZE(dma_channels))
if (channel >= ARRAY_SIZE(dma_channels)) {
pr_err("%s: failed to allocate a DMA channel",__func__);
goto out;
}
}
__set_bit(channel, channel_usage);
ch = &dma_channels[channel];