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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2016-08-08 21:50:53 +0900 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-08-11 15:09:43 +0300 |
| commit | 700aa7ff8d2c2b9cc669c99375e2ccd06d3cd38d (patch) | |
| tree | 29d96749efc618bb89c2bf3b093f30cc0ebb8c75 /drivers/usb/renesas_usbhs | |
| parent | 9ab967e6db7412b675ecbff80d5371d53c82cb2e (diff) | |
| download | linux-stable-700aa7ff8d2c2b9cc669c99375e2ccd06d3cd38d.tar.gz linux-stable-700aa7ff8d2c2b9cc669c99375e2ccd06d3cd38d.tar.bz2 linux-stable-700aa7ff8d2c2b9cc669c99375e2ccd06d3cd38d.zip | |
usb: renesas_usbhs: Use dmac only if the pipe type is bulk
This patch fixes an issue that isochronous transfer's data is possible to
be lost as a workaround. Since this driver uses a workqueue to start
the dmac, the transfer is possible to be delayed when system load is high.
Fixes: 6e4b74e4690d ("usb: renesas: fix scheduling in atomic context bug")
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs')
| -rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 280ed5ff021b..857e78337324 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -871,7 +871,7 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) /* use PIO if packet is less than pio_dma_border or pipe is DCP */ if ((len < usbhs_get_dparam(priv, pio_dma_border)) || - usbhs_pipe_is_dcp(pipe)) + usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) goto usbhsf_pio_prepare_push; /* check data length if this driver don't use USB-DMAC */ @@ -976,7 +976,7 @@ static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt, /* use PIO if packet is less than pio_dma_border or pipe is DCP */ if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) || - usbhs_pipe_is_dcp(pipe)) + usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) goto usbhsf_pio_prepare_pop; fifo = usbhsf_get_dma_fifo(priv, pkt); |