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 <[email protected]> --- 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 97a49f9..89a3dcc 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)) { -- 1.5.6 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
