diff options
| author | Peng Fan <peng.fan@nxp.com> | 2019-11-05 05:51:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-05 18:18:01 +0100 |
| commit | 487ee861de176090b055eba5b252b56a3b9973d6 (patch) | |
| tree | 4814f2d7f16e9fc675781b145eaf187a45660f91 /Documentation/translations/zh_CN | |
| parent | 879516870d7a8e7ec017efa9be49d86dd4e04d3b (diff) | |
tty: serial: fsl_lpuart: use the sg count from dma_map_sg
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".
When enabling iommu for lpuart + edma, iommu framework may concatenate
two sgs into one.
Fixes: 6250cc30c4c4e ("tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx")
Cc: <stable@vger.kernel.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1572932977-17866-1-git-send-email-peng.fan@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/translations/zh_CN')
0 files changed, 0 insertions, 0 deletions