diff options
| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2015-05-21 03:48:38 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-05-22 14:14:21 +0100 |
| commit | d23c9a0a5c237210bccb82a2e9dc0d26e75920ee (patch) | |
| tree | 03d2326d7ab8790b5ac681d8947a46c9885f0cfe /crypto | |
| parent | b787f68c36d49bb1d9236f403813641efa74a031 (diff) | |
| download | linux-d23c9a0a5c237210bccb82a2e9dc0d26e75920ee.tar.bz2 | |
dmaengine: rcar-dmac: fixup spinlock in rcar-dmac
Current rcar-dmac driver is using spin_lock_irq() / spin_unlock_irq()
in some functions. But, some other driver might call DMAEngine API
during interrupt disabled. In such case, rcar-dmac side spin_unlock_irq()
forcefully allows all interrupts. Therefore, other driver receives
unexpected interruption, and its exclusive access control will be broken.
This patch replaces spin_lock_irq() to spin_lock_irqsave(),
and spin_unlock_irq() to spin_unlock_irqrestore().
Reported-by: Cao Minh Hiep <cm-hiep@jinso.co.jp>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions