[PATCH] USB: atmel_usba_udc: fix it to deal with final DMA channel
From: Bo Shen <hidden>
Date: 2014-08-07 03:43:23
Also in:
lkml
Subsystem:
microchip usba udc driver, the rest, usb subsystem · Maintainers:
Cristian Birsan, Linus Torvalds, Greg Kroah-Hartman
As, the interrupt for DMA is counted from 1, so need to checked the USBA_NR_DMAS, in old way, it only check (USBA_NR_DMAS - 1), so fix it. Reported-by: Max Liao <redacted> Signed-off-by: Bo Shen <redacted> --- drivers/usb/gadget/udc/atmel_usba_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 906e65f..c9fe67e 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c@@ -1661,7 +1661,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid) if (dma_status) { int i; - for (i = 1; i < USBA_NR_DMAS; i++) + for (i = 1; i <= USBA_NR_DMAS; i++) if (dma_status & (1 << i)) usba_dma_irq(udc, &udc->usba_ep[i]); }
--
1.8.5.2