diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2015-08-21 21:02:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 19:33:48 +0300 |
| commit | 8eadb56d6830f169fd225a59e0e27dd97fc762c1 (patch) | |
| tree | 6be3715d1832afff4655284f0616f74c6e14ac7b /drivers/tty/serial/sh-sci.c | |
| parent | e6403c112f8cf573147f621533d2fa2c3fe015de (diff) | |
| download | linux-8eadb56d6830f169fd225a59e0e27dd97fc762c1.tar.xz | |
serial: sh-sci: Don't kick tx in sci_er_interrupt() when using DMA
If CONFIG_SERIAL_SH_SCI_DMA is enabled, the driver doesn't enable TIE
on SCIF or HSCIF. However, this driver may call sci_tx_interrupt()
in sci_er_interrupt(). After that, the driver cannot care of the
interrupt, and then "irq 109: nobody cared" happens on r8a7791/koelsch
board. This patch fixes the issue.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
[geert] Keep kicking tx when using PIO
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 82456fb09138..ffcbf6eaf5f9 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1011,7 +1011,8 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr) sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port)); /* Kick the transmission */ - sci_tx_interrupt(irq, ptr); + if (!s->chan_tx) + sci_tx_interrupt(irq, ptr); return IRQ_HANDLED; } |