When s3c_hsotg_trytx is called for ep without enqueued request, interrupts
for this ep are disabled, to prevent interrupt flooding. Interrupts are
enabled when new request for this ep is starting.
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/usb/gadget/s3c-hsotg.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 4fe2f9e..3024685d 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -823,6 +823,9 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n",
__func__, readl(hsotg->regs + epctrl_reg));
+
+ /* enable ep interrupts */
+ s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1);
}
/**
@@ -1791,8 +1794,16 @@ static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg,
{
struct s3c_hsotg_req *hs_req = hs_ep->req;
- if (!hs_ep->dir_in || !hs_req)
+ if (!hs_ep->dir_in || !hs_req) {
+ /**
+ * if request is not enqueued, we disable interrupts
+ * for endpoints, excepting ep0
+ */
+ if (hs_ep->index != 0)
+ s3c_hsotg_ctrl_epint(hsotg, hs_ep->index,
+ hs_ep->dir_in, 0);
return 0;
+ }
if (hs_req->req.actual < hs_req->req.length) {
dev_dbg(hsotg->dev, "trying to write more for ep%d\n",
--
1.7.9.5
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