diff options
| author | Huang Shijie <b32955@freescale.com> | 2013-10-11 03:39:07 -0400 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-16 09:05:47 -0400 |
| commit | 1887e8d839cbe90b6f9c59d998739d12b45ff30b (patch) | |
| tree | 80ffde983bcf259861943880affab12c8dc43b9a /drivers/tty | |
| parent | d61b9dac9ac2ba9bd7056b1bf0908dfbb000810c (diff) | |
serial: imx: fix the wrong number of scatterlist entries when xmit->head is 0
When the (xmit->tail > xmit->head) is true and the xmit->head is 0,
we only need one DMA scatterlist in actually. Current code uses two DMA
scatterlists in this case, this is obviously wrong.
This patch fixes it.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/imx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index c6c3b160dac7..cadf7e5848b2 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c | |||
| @@ -532,7 +532,7 @@ static void dma_tx_work(struct work_struct *w) | |||
| 532 | return; | 532 | return; |
| 533 | } | 533 | } |
| 534 | 534 | ||
| 535 | if (xmit->tail > xmit->head) { | 535 | if (xmit->tail > xmit->head && xmit->head > 0) { |
| 536 | sport->dma_tx_nents = 2; | 536 | sport->dma_tx_nents = 2; |
| 537 | sg_init_table(sgl, 2); | 537 | sg_init_table(sgl, 2); |
| 538 | sg_set_buf(sgl, xmit->buf + xmit->tail, | 538 | sg_set_buf(sgl, xmit->buf + xmit->tail, |