Currently DMA channels are allocated and they remain allocated
even if there is no active data transfer. Added channel_release()
whenever there is no pending request.
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
---
This patch is against today's linus's tree.
drivers/usb/musb/musb_host.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 877d20b..d78b887 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -387,11 +387,21 @@ static void musb_advance_schedule(struct musb *musb, struct urb *urb,
*/
if (list_empty(&qh->hep->urb_list)) {
struct list_head *head;
+ struct dma_controller *dma = musb->dma_controller;
- if (is_in)
+ if (is_in) {
ep->rx_reinit = 1;
- else
+ if (ep->rx_channel) {
+ dma->channel_release(ep->rx_channel);
+ ep->rx_channel = NULL;
+ }
+ } else {
ep->tx_reinit = 1;
+ if (ep->tx_channel) {
+ dma->channel_release(ep->tx_channel);
+ ep->tx_channel = NULL;
+ }
+ }
/* Clobber old pointers to this qh */
musb_ep_set_qh(ep, is_in, NULL);
--
1.6.2.4
--
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