Tony Lindgren bacdcb6675 dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idle ... Yegor Yefremov <yegorslists@googlemail.com> reported that musb and ftdi uart can fail for the first open of the uart unless connected using a hub. This is because the first dma call done by musb_ep_program() must wait if cppi41 is PM runtime suspended. Otherwise musb_ep_program() continues with other non-dma packets before the DMA transfer is started causing at least ftdi uarts to fail to receive data. Let's fix the issue by waking up cppi41 with PM runtime calls added to cppi41_dma_prep_slave_sg() and return NULL if still idled. This way we have musb_ep_program() continue with PIO until cppi41 is awake. Fixes: fdea2d09b9 ("dmaengine: cppi41: Add basic PM runtime support") Reported-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: stable@vger.kernel.org # v4.9+ Link: https://lore.kernel.org/r/20191023153138.23442-1-tony@atomide.com Signed-off-by: Vinod Koul <vkoul@kernel.org>		2019-10-23 21:15:21 +05:30
..
cppi41.c	dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idle	2019-10-23 21:15:21 +05:30
dma-crossbar.c	dmaengine: ti: dma-crossbar: Fix a memory leak bug	2019-08-20 17:16:15 +05:30
edma.c	dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits()	2019-09-04 15:19:19 +05:30
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	dmaengine: ti: New directory for Texas Instruments DMA drivers	2018-04-25 14:56:21 +05:30
omap-dma.c	dmaengine updates for v5.4-rc1	2019-09-17 19:04:40 -07:00