| Message ID | 1490270519-4046-1-git-send-email-m.szyprowski@samsung.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,1/2] serial: samsung: Use right device for DMA-mapping calls | expand |
On Thu, Mar 23, 2017 at 01:01:52PM +0100, Marek Szyprowski wrote: > Driver should provide its own struct device for all DMA-mapping calls instead > of extracting device pointer from DMA engine channel. For the purpose of cc-stable it might be useful to answer here what visible error is fixed (or why driver should not use DMA's device) but on the other hand this is actually obvious... Anyway: Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof > Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> > Fixes: 62c37eedb74c8 ("serial: samsung: add dma reqest/release functions") > CC: stable@vger.kernel.org # v4.0+ > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> > --- > v2: > - fixed commit id in 'fixes' tag, added 'reviewed-by' tag > --- > drivers/tty/serial/samsung.c | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 7a17aedbf902..9f3759bdb44f 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -901,14 +901,13 @@ static int s3c24xx_serial_request_dma(struct s3c24xx_uart_port *p) return -ENOMEM; } - dma->rx_addr = dma_map_single(dma->rx_chan->device->dev, dma->rx_buf, + dma->rx_addr = dma_map_single(p->port.dev, dma->rx_buf, dma->rx_size, DMA_FROM_DEVICE); spin_lock_irqsave(&p->port.lock, flags); /* TX buffer */ - dma->tx_addr = dma_map_single(dma->tx_chan->device->dev, - p->port.state->xmit.buf, + dma->tx_addr = dma_map_single(p->port.dev, p->port.state->xmit.buf, UART_XMIT_SIZE, DMA_TO_DEVICE); spin_unlock_irqrestore(&p->port.lock, flags); @@ -922,7 +921,7 @@ static void s3c24xx_serial_release_dma(struct s3c24xx_uart_port *p) if (dma->rx_chan) { dmaengine_terminate_all(dma->rx_chan); - dma_unmap_single(dma->rx_chan->device->dev, dma->rx_addr, + dma_unmap_single(p->port.dev, dma->rx_addr, dma->rx_size, DMA_FROM_DEVICE); kfree(dma->rx_buf); dma_release_channel(dma->rx_chan); @@ -931,7 +930,7 @@ static void s3c24xx_serial_release_dma(struct s3c24xx_uart_port *p) if (dma->tx_chan) { dmaengine_terminate_all(dma->tx_chan); - dma_unmap_single(dma->tx_chan->device->dev, dma->tx_addr, + dma_unmap_single(p->port.dev, dma->tx_addr, UART_XMIT_SIZE, DMA_TO_DEVICE); dma_release_channel(dma->tx_chan); dma->tx_chan = NULL;
Driver should provide its own struct device for all DMA-mapping calls instead of extracting device pointer from DMA engine channel. Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Fixes: 62c37eedb74c8 ("serial: samsung: add dma reqest/release functions") CC: stable@vger.kernel.org # v4.0+ Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> --- v2: - fixed commit id in 'fixes' tag, added 'reviewed-by' tag --- drivers/tty/serial/samsung.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html