From: Guennadi Liakhovetski Date: Fri, 21 May 2010 15:22:40 +0000 (+0000) Subject: sh: fix Oops in the serial SCI driver X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=85b8e3ffc47b2a1913be3079e9f1c1f66a6240b2;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git sh: fix Oops in the serial SCI driver Fix an Oops, triggering, if the DMA buffer allocation for the Rx channel in sh-sci.c fails. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Paul Mundt --- diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c index 4f73fb75674..5f90fcd7d10 100644 --- a/drivers/serial/sh-sci.c +++ b/drivers/serial/sh-sci.c @@ -1004,8 +1004,9 @@ static void sci_rx_dma_release(struct sci_port *s, bool enable_pio) s->chan_rx = NULL; s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL; dma_release_channel(chan); - dma_free_coherent(port->dev, s->buf_len_rx * 2, - sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0])); + if (sg_dma_address(&s->sg_rx[0])) + dma_free_coherent(port->dev, s->buf_len_rx * 2, + sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0])); if (enable_pio) sci_start_rx(port); }