Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Wed, 27 Apr 2016 01:02:24 +0200 | Subject | [PATCH 3.2 061/115] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer |
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3.2.80-rc1 review patch. If anyone has any objections, please let me know.
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From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
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") Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/usb/renesas_usbhs/fifo.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -932,6 +932,7 @@ static int usbhsf_dma_try_pop(struct usb pkt->trans = len; + usbhsf_tx_irq_ctrl(pipe, 0); tasklet_init(&fifo->tasklet, usbhsf_dma_prepare_tasklet, (unsigned long)pkt);
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