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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2016-03-10 11:30:15 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-20 15:45:22 +0900 |
| commit | a5ad7e6fa53c454a646dd0e21044eee7de4ba5bb (patch) | |
| tree | c07b762e85b7e4530323b753d79e3fa9132ae97a | |
| parent | e7628778a9cb06a7ec78d18a0ece64d195289376 (diff) | |
| download | lwn-a5ad7e6fa53c454a646dd0e21044eee7de4ba5bb.tar.gz lwn-a5ad7e6fa53c454a646dd0e21044eee7de4ba5bb.zip | |
usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 32df73820726..f1893e08e51a 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -890,6 +890,7 @@ static int usbhsf_dma_prepare_push(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); |