From: Alexey Khoroshilov <khoroshi...@ispras.ru> Date: Sat, 12 Sep 2015 00:34:48 +0300
> ali_ircc_sir_change_speed() is always called with self->lock held, > so acquiring the lock inside it leads to unavoidable deadlock. > > Call graph: > ali_ircc_sir_change_speed() is called from ali_ircc_change_speed() > ali_ircc_fir_hard_xmit() under spin_lock_irqsave(&self->lock, flags); > ali_ircc_sir_hard_xmit() under spin_lock_irqsave(&self->lock, flags); > ali_ircc_net_ioctl() under spin_lock_irqsave(&self->lock, flags); > ali_ircc_dma_xmit_complete() > ali_ircc_fir_interrupt() > ali_ircc_interrupt() under spin_lock(&self->lock); > ali_ircc_sir_write_wakeup() > ali_ircc_sir_interrupt() > ali_ircc_interrupt() under spin_lock(&self->lock); > > The patch removes spin_lock/unlock from ali_ircc_sir_change_speed(). > > Found by Linux Driver Verification project (linuxtesting.org). > > Signed-off-by: Alexey Khoroshilov <khoroshi...@ispras.ru> Looks good, applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
