dmaengine: dw: disable BLOCK IRQs for non-cyclic xfer

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[ Upstream commit ee1cdcdae5 ]

The commit 2895b2cad6 ("dmaengine: dw: fix cyclic transfer callbacks")
re-enabled BLOCK interrupts with regard to make cyclic transfers work. However,
this change becomes a regression for non-cyclic transfers as interrupt counters
under stress test had been grown enormously (approximately per 4-5 bytes in the
UART loop back test).

Taking into consideration above enable BLOCK interrupts if and only if channel
is programmed to perform cyclic transfer.

Fixes: 2895b2cad6 ("dmaengine: dw: fix cyclic transfer callbacks")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mans Rullgard <mans@mansr.com>
Tested-by: Mans Rullgard <mans@mansr.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

This commit is contained in:

Andy Shevchenko 2016-02-10 15:59:42 +02:00 • committed by Sasha Levin

parent 800b26634a

commit 6bdec2b3a4

1 changed files with 10 additions and 5 deletions

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drivers/dma/dw/core.c

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