kernel/drivers/dma/ti/cppi41.c, branch linux-5.1.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-5.1.y2018-12-05T08:31:59Zdmaengine: cppi41: delete channel from pending list when stop channel2018-12-05T08:31:59ZBin Liub-liu@ti.com2018-11-12T15:43:22Zurn:sha1:59861547ec9a9736e7882f6fb0c096a720ff811a
The driver defines three states for a cppi channel.
- idle: .chan_busy == 0 && not in .pending list
- pending: .chan_busy == 0 && in .pending list
- busy: .chan_busy == 1 && not in .pending list
There are cases in which the cppi channel could be in the pending state
when cppi41_dma_issue_pending() is called after cppi41_runtime_suspend()
is called.
cppi41_stop_chan() has a bug for these cases to set channels to idle state.
It only checks the .chan_busy flag, but not the .pending list, then later
when cppi41_runtime_resume() is called the channels in .pending list will
be transitioned to busy state.
Removing channels from the .pending list solves the problem.
Fixes: 975faaeb9985 ("dma: cppi41: start tear down only if channel is busy")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Bin Liu <b-liu@ti.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: ti: New directory for Texas Instruments DMA drivers2018-04-25T09:26:21ZPeter Ujfalusipeter.ujfalusi@ti.com2018-04-25T08:45:03Zurn:sha1:d88b1397c674178e595319fab4a3cd434c915639
Collect the Texas Instruments DMA drivers under drivers/dma/ti/
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>