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| author | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2010-01-06 17:29:11 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-02-04 13:30:01 -0800 |
| commit | 447f18f1b4a3e86159353d016dcaac25414b3a42 (patch) | |
| tree | 6a7d3c23189ee9e9c4dd53a2be74bc3f68783b63 /arch/arm/mach-davinci/dma.c | |
| parent | 2d517508060c22ef371a61495773cf890def291a (diff) | |
| download | linux-447f18f1b4a3e86159353d016dcaac25414b3a42.tar.gz linux-447f18f1b4a3e86159353d016dcaac25414b3a42.tar.bz2 linux-447f18f1b4a3e86159353d016dcaac25414b3a42.zip | |
davinci: Fix edma_alloc_channel api for EDMA_CHANNEL_ANY case
Though edma_alloc_channel api was looping through the available
channel controllers in EDMA_CHANNEL_ANY case, it was never
returning the channel for 2nd channel controller, if 1st
channel controller had no free channels. This issue has
been fixed with this patch.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/dma.c')
| -rw-r--r-- | arch/arm/mach-davinci/dma.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c index 97a49f98fe13..89a3dccde19f 100644 --- a/arch/arm/mach-davinci/dma.c +++ b/arch/arm/mach-davinci/dma.c @@ -595,7 +595,7 @@ int edma_alloc_channel(int channel, void *data, enum dma_event_q eventq_no) { - unsigned i, done, ctlr = 0; + unsigned i, done = 0, ctlr = 0; if (channel >= 0) { ctlr = EDMA_CTLR(channel); @@ -611,7 +611,7 @@ int edma_alloc_channel(int channel, edma_info[i]->num_channels, channel); if (channel == edma_info[i]->num_channels) - return -ENOMEM; + break; if (!test_and_set_bit(channel, edma_info[i]->edma_inuse)) { done = 1; @@ -623,6 +623,8 @@ int edma_alloc_channel(int channel, if (done) break; } + if (!done) + return -ENOMEM; } else if (channel >= edma_info[ctlr]->num_channels) { return -EINVAL; } else if (test_and_set_bit(channel, edma_info[ctlr]->edma_inuse)) { |