usb: gadget: s3c-hsotg: fix endpoint interrupts handling
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@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index bb17385..30cead1 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -841,6 +841,9 @@
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);
}
/**
@@ -1814,8 +1817,16 @@
{
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",