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usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer

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commit 6490865c67825277b29638e839850882600b48ec upstream.

This patch adds a code to surely disable TX IRQ of the pipe before
starting TX DMAC transfer. Otherwise, a lot of unnecessary TX IRQs
may happen in rare cases when DMAC is used.

Fixes: e73a989 ("usb: renesas_usbhs: add DMAEngine support")
Cc: <stable@vger.kernel.org> # v3.1+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Yoshihiro Shimoda
2016-03-10 11:30:15 +09:00
committed by Willy Tarreau
parent 5a6df60e67
commit 4407936bbe
1 changed files with 1 additions and 0 deletions
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drivers/usb/renesas_usbhs/fifo.c
+1
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@@ -934,6 +934,7 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
pkt->trans = len;
usbhsf_tx_irq_ctrl(pipe, 0);
INIT_WORK(&pkt->work, xfer_work);
schedule_work(&pkt->work);