From: Mike Galbraith Date: Wed, 18 Feb 2015 15:09:23 +0100 Subject: snd/pcm: fix snd_pcm_stream_lock*() irqs_disabled() splats Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.14/older/patches-4.14.8-rt9.tar.xz Locking functions previously using read_lock_irq()/read_lock_irqsave() were changed to local_irq_disable/save(), leading to gripes. Use nort variants. |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |in_atomic(): 0, irqs_disabled(): 1, pid: 5947, name: alsa-sink-ALC88 |CPU: 5 PID: 5947 Comm: alsa-sink-ALC88 Not tainted 3.18.7-rt1 #9 |Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.404 11/06/2014 | ffff880409316240 ffff88040866fa38 ffffffff815bdeb5 0000000000000002 | 0000000000000000 ffff88040866fa58 ffffffff81073c86 ffffffffa03b2640 | ffff88040239ec00 ffff88040866fa78 ffffffff815c3d34 ffffffffa03b2640 |Call Trace: | [] dump_stack+0x4f/0x9e | [] __might_sleep+0xe6/0x150 | [] __rt_spin_lock+0x24/0x50 | [] rt_read_lock+0x34/0x40 | [] snd_pcm_stream_lock+0x29/0x70 [snd_pcm] | [] snd_pcm_playback_poll+0x5d/0x120 [snd_pcm] | [] do_sys_poll+0x322/0x5b0 | [] SyS_ppoll+0x1a8/0x1c0 | [] system_call_fastpath+0x16/0x1b Signed-off-by: Mike Galbraith Signed-off-by: Sebastian Andrzej Siewior --- sound/core/pcm_native.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -148,7 +148,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock) void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) { if (!substream->pcm->nonatomic) - local_irq_disable(); + local_irq_disable_nort(); snd_pcm_stream_lock(substream); } EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); @@ -163,7 +163,7 @@ void snd_pcm_stream_unlock_irq(struct sn { snd_pcm_stream_unlock(substream); if (!substream->pcm->nonatomic) - local_irq_enable(); + local_irq_enable_nort(); } EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); @@ -171,7 +171,7 @@ unsigned long _snd_pcm_stream_lock_irqsa { unsigned long flags = 0; if (!substream->pcm->nonatomic) - local_irq_save(flags); + local_irq_save_nort(flags); snd_pcm_stream_lock(substream); return flags; } @@ -189,7 +189,7 @@ void snd_pcm_stream_unlock_irqrestore(st { snd_pcm_stream_unlock(substream); if (!substream->pcm->nonatomic) - local_irq_restore(flags); + local_irq_restore_nort(flags); } EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);