From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> 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@xxxxxxxxxxx> [geert] Keep kicking tx when using PIO Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- v3: - Assimilated into my series. --- drivers/tty/serial/sh-sci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 82456fb09138dc2a..ffcbf6eaf5f98723 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
