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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-07-05 14:56:20 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-07-06 10:21:05 +0530 |
| commit | 99ba8b9b0d9780e9937eb1d488d120e9e5c2533d (patch) | |
| tree | 1a5f69b6e0cf89684386d41f83d0bbc2104e4ec7 /net/ipv4/fou.c | |
| parent | e3122822a74033ba8d6d9af855078f9ab741e33f (diff) | |
dmaengine: dw: Initialize channel before each transfer
In some cases DMA can be used only with a consumer which does runtime power
management and on the platforms, that have DMA auto power gating logic
(see comments in the drivers/acpi/acpi_lpss.c), may result in DMA losing
its context. Simple mitigation of this issue is to initialize channel
each time the consumer initiates a transfer.
Fixes: cfdf5b6cc598 ("dw_dmac: add support for Lynxpoint DMA controllers")
Reported-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=206403
Link: https://lore.kernel.org/r/20200705115620.51929-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'net/ipv4/fou.c')
0 files changed, 0 insertions, 0 deletions