| Message ID | 1422282700-7351-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c index 9fff23fa1519..f34157a8dc22 100644 --- a/drivers/usb/gadget/atmel_usba_udc.c +++ b/drivers/usb/gadget/atmel_usba_udc.c @@ -1572,7 +1572,6 @@ static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep) if ((epstatus & epctrl) & USBA_RX_BK_RDY) { DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name); receive_data(ep); - usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY); } }
This is a note to let you know that I have just added a patch titled usb: gadget: udc: atmel: fix possible IN hang issue to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt5. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 69d1ff02854e7668ddff73cc04d909d6dc9eb5af Mon Sep 17 00:00:00 2001 From: Bo Shen <voice.shen@atmel.com> Date: Wed, 17 Dec 2014 17:18:49 +0800 Subject: [PATCH] usb: gadget: udc: atmel: fix possible IN hang issue commit 6785a1034461c2d2c205215f63a50a740896e55b upstream. When receive data, the RXRDY in status register set by hardware after a new packet has been stored in the endpoint FIFO. When it is copied from FIFO, this bit is cleared which make the FIFO can be accessed again. In the receive_data() function, this bit RXRDY has been cleared. So, after the receive_data() function return, this bit should not be cleared again, or else it may cause the accessing FIFO corrupt, which will make the data loss. Fixes: 914a3f3b3754 (USB: add atmel_usba_udc driver) Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Felipe Balbi <balbi@ti.com> [ luis: backported to 3.16: - file rename: drivers/usb/gadget/udc/atmel_usba_udc.c -> drivers/usb/gadget/atmel_usba_udc.c ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/usb/gadget/atmel_usba_udc.c | 1 - 1 file changed, 1 deletion(-) -- 2.1.4