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

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[ Upstream commit ba3a1a915c49cc3023e4ddfc88f21e7514e82aa4 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Cristian Birsan 2019-10-04 20:10:54 +03:00 • committed by Greg Kroah-Hartman
parent 260f8a6027
commit 8748e69e7e
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/gadget/udc/atmel_usba_udc.c
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@ -403,9 +403,11 @@ static void submit_request(struct usba_ep *ep, struct usba_request *req)
next_fifo_transaction(ep, req);
if (req->last_transaction) {
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
if (ep_is_control(ep))
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
} else {
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
if (ep_is_control(ep))
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
}
}