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spi: atmel: Fix scheduling while atomic bug

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atmel_spi_lock does a spin_lock_irqsave, so we need to renable the
interrupts when we want to schedule.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Alexander Stein 2014-04-13 12:45:10 +02:00 committed by Mark Brown
parent c9eaa447e7
commit 1676014ef9
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi-atmel.c
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@ -1115,8 +1115,11 @@ static int atmel_spi_one_transfer(struct spi_master *master,
atmel_spi_next_xfer_pio(master, xfer);
}
/* interrupts are disabled, so free the lock for schedule */
atmel_spi_unlock(as);
ret = wait_for_completion_timeout(&as->xfer_completion,
SPI_DMA_TIMEOUT);
atmel_spi_lock(as);
if (WARN_ON(ret == 0)) {
dev_err(&spi->dev,
"spi trasfer timeout, err %d\n", ret);