[PATCH 2/5] tty/serial: at91: correct buffer size used in DMA
From: Leilei Zhao <hidden>
Date: 2015-02-26 07:05:16
Also in:
linux-arm-kernel, lkml
Subsystem:
microchip at91 serial driver, the rest, tty layer and serial drivers · Maintainers:
Richard Genoud, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
The buffer size set in DMA is inconsistent with its allocation. So keep them consistent here. The structure atmel_uart_char is used in PIO mode with its meaning. But here in DMA, all of the buffer is treated as general char. Signed-off-by: Leilei Zhao <redacted> Acked-by: Nicolas Ferre <redacted> --- drivers/tty/serial/atmel_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 460903c..6a4d44d 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c@@ -1030,7 +1030,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) BUG_ON((int)ring->buf & ~PAGE_MASK); sg_set_page(&atmel_port->sg_rx, virt_to_page(ring->buf), - ATMEL_SERIAL_RINGSIZE, + sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE, (int)ring->buf & ~PAGE_MASK); nent = dma_map_sg(port->dev, &atmel_port->sg_rx,
--
1.7.9.5