Commits
Peng Fan committed 24259ac670f
MLK-16218 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")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>