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authorAlexander Stein <alexanders83@web.de>2014-04-13 14:45:10 +0400
committerMark Brown <broonie@linaro.org>2014-04-18 18:41:23 +0400
commit1676014ef974ce71a854e7f415e2bb52feb24868 (patch)
tree2c703c33b4fef9bad936e59faf0d501b560d991e /drivers/spi/spi-atmel.c
parentc9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff)
downloadlinux-1676014ef974ce71a854e7f415e2bb52feb24868.tar.xz
spi: atmel: Fix scheduling while atomic bug
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>
Diffstat (limited to 'drivers/spi/spi-atmel.c')
-rw-r--r--drivers/spi/spi-atmel.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 8005f9869481..079e6b1b0cdb 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -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);