On Thu, May 21, 2015 at 03:48:38AM +0000, Kuninori Morimoto wrote: > From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > > 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@xxxxxxxxxxx> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > Tested-by: Keita Kobayashi <keita.kobayashi.ym@xxxxxxxxxxx> Acked-by: Vinod Koul <vinod.koul@xxxxxxxxx> Mark, please apply this thru your tree Thanks -- ~Vinod -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
