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06891af270
Merge series from Nam Cao <namcao@linutronix.de>: While running the spl022, I got the following warning: BUG: sleeping function called from invalid context at drivers/spi/spi.c:1428 This is because between spi transfers, spi_transfer_delay_exec() (who may sleep if the delay is >10us) is called in interrupt context. This is a problem for anyone who runs this driver and need more than 10us delay. Patch 1 adds an error reporting mechanism, needed by patch 2 who switch to use the default spi_transfer_one_message(), which fix the problem. The series is tested with polling transfer mode and interrupt transfer mode. I can't test the DMA mode, so some help testing here is very appreciated.
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