openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

usb: gadget: udc: atmel: Fix interrupt storm in FIFO mode. 

Fix interrupt storm generated by endpoints when working in FIFO mode.
The TX_COMPLETE interrupt is used only by control endpoints processing.
Do not enable it for other types of endpoints.

Fixes: 914a3f3b37 ("USB: add atmel_usba_udc driver")
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Cristian Birsan 2019-10-04 20:10:54 +03:00 committed by Felipe Balbi
parent e92f30ac37
commit ba3a1a915c
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/gadget/udc/atmel_usba_udc.c
View File

@ -449,8 +449,10 @@ static void submit_request(struct usba_ep *ep, struct usba_request *req)
next_fifo_transaction(ep, req); next_fifo_transaction(ep, req);
if (req->last_transaction) { if (req->last_transaction) {
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY); usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
if (ep_is_control(ep))
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE); usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
} else { } else {
if (ep_is_control(ep))
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE); usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY); usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
} }