lkml.org 
[lkml]   [2016]   [Apr]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Date
    Subject[PATCH 3.2 061/115] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer
    3.2.80-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    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);
    \
     
     \ /
      Last update: 2016-04-27 01:41    [W:5.147 / U:1.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site