Andy Shevchenko 556dfd8dae dmaengine: dw: disable BLOCK IRQs for non-cyclic xfer ...

commit ee1cdcdae5 upstream.

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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2016-03-03 15:07:24 -08:00

..

core.c

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

2016-03-03 15:07:24 -08:00

internal.h

dmaengine: dw: export probe()/remove() and Co to users

2014-10-15 20:31:05 +05:30

Kconfig

dmaengine: sort the dw Kconfig

2015-08-24 13:58:18 +05:30

Makefile

dma: dw: add PCI part of the driver

2013-07-05 11:40:45 +05:30

pci.c

dmaengine: dw: use dw_dmac autoconfiguration in PCI driver

2015-09-30 13:43:09 +05:30

platform.c

dmaengine: dw: platform: provide platform data for Intel

2015-10-31 07:32:36 +05:30

regs.h

dmaengine: dw: define DW_DMA_MAX_NR_MASTERS

2015-02-04 22:39:44 -08:00