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| author | Leilei Zhao <leilei.zhao@atmel.com> | 2015-02-27 16:07:14 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-07 03:51:47 +0100 |
| commit | 2c2770541040318fa6ac0ac4424d8af6dd0709bf (patch) | |
| tree | 11bc0ea4048d038223f08f0c531f3ce2355b2f53 | |
| parent | 1c9be31015747b0a981804438b269cfb0f49aa8a (diff) | |
| download | linux-2c2770541040318fa6ac0ac4424d8af6dd0709bf.tar.gz linux-2c2770541040318fa6ac0ac4424d8af6dd0709bf.tar.xz | |
tty/serial: at91: correct check of buf used in DMA
We only use buf of ring In DMA rx function while using buf of xmit
in DMA tx function. So in DMA rx we need definitively to check the
buf of ring which is corresponding to DMA rx function. And use macro
PAGE_ALIGNED to simplify the expression.
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 4031dc367d3b..1a1d255baab5 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -848,7 +848,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port) spin_lock_init(&atmel_port->lock_tx); sg_init_table(&atmel_port->sg_tx, 1); /* UART circular tx buffer is an aligned page. */ - BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); + BUG_ON(!PAGE_ALIGNED(port->state->xmit.buf)); sg_set_page(&atmel_port->sg_tx, virt_to_page(port->state->xmit.buf), UART_XMIT_SIZE, @@ -1027,7 +1027,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) spin_lock_init(&atmel_port->lock_rx); sg_init_table(&atmel_port->sg_rx, 1); /* UART circular rx buffer is an aligned page. */ - BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); + BUG_ON(!PAGE_ALIGNED(ring->buf)); sg_set_page(&atmel_port->sg_rx, virt_to_page(ring->buf), ATMEL_SERIAL_RINGSIZE, |