OpenCloudOS-Kernel/drivers/dma/dw
Andy Shevchenko ee1cdcdae5 dmaengine: dw: disable BLOCK IRQs for non-cyclic xfer
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>
2016-02-15 22:19:32 +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
core.c dmaengine: dw: disable BLOCK IRQs for non-cyclic xfer 2016-02-15 22:19:32 +05:30
internal.h dmaengine: dw: export probe()/remove() and Co to users 2014-10-15 20:31:05 +05:30
pci.c dmaengine: dw: pci: add ID for WildcatPoint PCH 2016-02-08 08:35:17 +05:30
platform.c dmaengine updates for 4.5-rc1 2016-01-13 10:59:52 -08:00
regs.h dmaengine: dw: define DW_DMA_MAX_NR_MASTERS 2015-02-04 22:39:44 -08:00