Reprogramming the DMA after tear down is initiated leads to warning.
This is mainly seen with ISOCH since we do a delayed completion for
ISOCH transfers. In ISOCH transfers dma_completion should not reprogram
if the channel tear down is initiated.
Signed-off-by: George Cherian <george.cherian@xxxxxx>
---
drivers/usb/musb/musb_cppi41.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index f3ec7d2..e201b1e 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -132,7 +132,8 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
struct musb_hw_ep *hw_ep = cppi41_channel->hw_ep;
struct musb *musb = hw_ep->musb;
- if (!cppi41_channel->prog_len) {
+ if (!cppi41_channel->prog_len ||
+ (cppi41_channel->channel.status == MUSB_DMA_STATUS_FREE)) {
/* done, complete */
cppi41_channel->channel.actual_len =
--
1.8.1
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