diff options
| author | Radu Pirea <radu.pirea@microchip.com> | 2017-12-15 17:40:17 +0200 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@microsoft.com> | 2018-03-20 23:49:44 -0400 |
| commit | 69851339b19154cf49013739a36eece169b1bf1a (patch) | |
| tree | 8b7019f0f979b2e006083d5c7d5d15eb9d93d5a7 /drivers | |
| parent | 0ca00a61a3608ca07def8516b74b88ae685856dc (diff) | |
spi: atmel: fixed spin_lock usage inside atmel_spi_remove
[ Upstream commit 66e900a3d225575c8b48b59ae1fe74bb6e5a65cc ]
The only part of atmel_spi_remove which needs to be atomic is hardware
reset.
atmel_spi_stop_dma calls dma_terminate_all and this needs interrupts
enabled.
atmel_spi_release_dma calls dma_release_channel and dma_release_channel
locks a mutex inside of spin_lock.
So the call of these functions can't be inside a spin_lock.
Reported-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Radu Pirea <radu.pirea@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-atmel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index a2f40b1b2225..3fef713f693b 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -1423,12 +1423,12 @@ static int atmel_spi_remove(struct platform_device *pdev) pm_runtime_get_sync(&pdev->dev); /* reset the hardware and block queue progress */ - spin_lock_irq(&as->lock); if (as->use_dma) { atmel_spi_stop_dma(as); atmel_spi_release_dma(as); } + spin_lock_irq(&as->lock); spi_writel(as, CR, SPI_BIT(SWRST)); spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ spi_readl(as, SR); |