linux/drivers/dma, branch v2.6.32

shdma: fix initialization error handling

2009-11-22T19:10:10Z

1/ Error handling code following a kzalloc should free the allocated data. 2/ Report an error when no platform data is detected Both problems fixed by moving the platform data check before the allocation, and allows a goto to be killed. Reported-by: Julia Lawall Acked-by: Julia Lawall Signed-off-by: Dan Williams

ioat3: fix pq completion versus channel deallocation race

2009-11-20T06:21:03Z

The completion of a pq operation is notified with a null descriptor appended to the end of the chain. This descriptor needs to be visible to dma clients otherwise the client is precluded from ensuring all operations are quiesced before freeing channel resources, i.e. due to descriptor polling it may get the completion notification ahead of the interrupt delivered by the null descriptor. Signed-off-by: Dan Williams

async_tx: build-time toggling of async_{syndrome,xor}_val dma support

2009-11-20T06:21:03Z

ioat3.2 does not support asynchronous error notifications which makes the driver experience latencies when non-zero pq validate results are expected. Provide a mechanism for turning off async_xor_val and async_syndrome_val via Kconfig. This approach is generally useful for any driver that specifies ASYNC_TX_DISABLE_CHANNEL_SWITCH and would like to force the async_tx api to fall back to the synchronous path for certain operations. Signed-off-by: Dan Williams

dmaengine: include xor/pq validate in device_has_all_tx_types()

2009-11-20T06:21:03Z

A channel must include these capabilities to satisfy ASYNC_TX_DISABLE_CHANNEL_SWITCH. Signed-off-by: Dan Williams

ioat2,3: report all uncorrectable errors

2009-11-20T06:21:03Z

Modify is_ioat_bug() to catch all errors that are uncorrectable, or not currently handled. Signed-off-by: Dan Williams

ioat3: specify valid address for disabled-Q or disabled-P

2009-11-20T00:08:45Z

Although disabled, hardware still checks address validity, so duplicate the known address. Signed-off-by: Dan Williams

ioat2,3: disable asynchronous error notifications

2009-11-20T00:07:57Z

Error interrupts and error completions may cause channel hangs, so poll the channel status register after a timeout. Signed-off-by: Dan Williams

ioat3: dca and raid operations are incompatible

2009-11-20T00:07:10Z

RAID operations cause a system hang on platforms with DCA (Direct-Cache-Access) enabled. So turn off RAID capabilities in this case. Signed-off-by: Dan Williams

ioat: silence "dca disabled" messages

2009-11-17T18:34:31Z

Turning off dca is not an "error", and the dca-enabled state can be viewed from sysfs. Signed-off-by: Dan Williams

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx into for-linus

2009-09-23T08:31:11Z