Commit f6034225 authored by Sricharan R's avatar Sricharan R Committed by Vinod Koul

dmaengine: qcom: bam_dma: Fix completed descriptors count

One space is left unused in circular FIFO to differentiate
'full' and 'empty' cases. So take that in to account while
counting for the descriptors completed.

Fixes the issue reported here,
	https://lkml.org/lkml/2019/6/18/669

Cc: stable@vger.kernel.org
Reported-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarSricharan R <sricharan@codeaurora.org>
Tested-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 3f93a4f2
...@@ -799,6 +799,9 @@ static u32 process_channel_irqs(struct bam_device *bdev) ...@@ -799,6 +799,9 @@ static u32 process_channel_irqs(struct bam_device *bdev)
/* Number of bytes available to read */ /* Number of bytes available to read */
avail = CIRC_CNT(offset, bchan->head, MAX_DESCRIPTORS + 1); avail = CIRC_CNT(offset, bchan->head, MAX_DESCRIPTORS + 1);
if (offset < bchan->head)
avail--;
list_for_each_entry_safe(async_desc, tmp, list_for_each_entry_safe(async_desc, tmp,
&bchan->desc_list, desc_node) { &bchan->desc_list, desc_node) {
/* Not enough data to read */ /* Not enough data to read */
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment