When selecting different alt setting, s3c_hsotg_ep_enable can be
called with fifo already allocated. Allocate fifo again only if
required and after deallocating the previous fifo.
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@xxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index b7368df..ce6a3cf 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2522,11 +2522,22 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
break;
}
+ /* If fifo is already allocated for this ep */
+ if (hs_ep->fifo_index) {
+ size = hs_ep->ep.maxpacket * hs_ep->mc;
+ /* If bigger fifo is required deallocate current one */
+ if (size > hs_ep->fifo_size) {
+ hsotg->fifo_map &= ~(1 << hs_ep->fifo_index);
+ hs_ep->fifo_index = 0;
+ hs_ep->fifo_size = 0;
+ }
+ }
+
/*
* if the hardware has dedicated fifos, we must give each IN EP
* a unique tx-fifo even if it is non-periodic.
*/
- if (dir_in && hsotg->dedicated_fifos) {
+ if (dir_in && hsotg->dedicated_fifos && !hs_ep->fifo_index) {
u32 fifo_index = 0;
u32 fifo_size = UINT_MAX;
size = hs_ep->ep.maxpacket*hs_ep->mc;
--
1.9.1
--
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