diff options
| author | Peng Fan <peng.fan@nxp.com> | 2019-11-07 06:42:53 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-17 19:45:50 +0100 |
| commit | 9eee44f069bd76481598013c53e65ecd385d7438 (patch) | |
| tree | 37252398caace7669f3c5abda5dd0d2377ce1fc1 /drivers | |
| parent | 6f0c76be8b0cb0250a68582c6bb2cc6c774ce597 (diff) | |
tty: serial: imx: use the sg count from dma_map_sg
commit 596fd8dffb745afcebc0ec6968e17fe29f02044c upstream.
The dmaengine_prep_slave_sg needs to use sg count returned
by dma_map_sg, not use sport->dma_tx_nents, because the return
value of dma_map_sg is not always same with "nents".
Fixes: b4cdc8f61beb ("serial: imx: add DMA support for imx6q")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1573108875-26530-1-git-send-email-peng.fan@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -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 aae68230fb7b..a81a5be0cf7a 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -542,7 +542,7 @@ static void imx_dma_tx(struct imx_port *sport) dev_err(dev, "DMA mapping error for TX.\n"); return; } - desc = dmaengine_prep_slave_sg(chan, sgl, sport->dma_tx_nents, + desc = dmaengine_prep_slave_sg(chan, sgl, ret, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); if (!desc) { dma_unmap_sg(dev, sgl, sport->dma_tx_nents, |