[ALSA] intel8x0 - Fix Oops at kdump crash kernel

Fixed Oops at crash kernel from intel8x0 driver that is triggered
from interrupt handler.  Proper irqsave version seems needed for
kexec/kdump.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 3 insertions, 2 deletions

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index ff65e049114b..7cf2dcb9d8d4 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -725,10 +725,11 @@ static void fill_nocache(void *buf, int size, int nocache)
 static inline void snd_intel8x0_update(struct intel8x0 *chip, struct ichdev *ichdev)
 {
         unsigned long port = ichdev->reg_offset;
+        unsigned long flags;
         int status, civ, i, step;
         int ack = 0;
 
-        spin_lock(&chip->reg_lock);
+        spin_lock_irqsave(&chip->reg_lock, flags);
         status = igetbyte(chip, port + ichdev->roff_sr);
         civ = igetbyte(chip, port + ICH_REG_OFF_CIV);
         if (!(status & ICH_BCIS)) {
@@ -768,7 +769,7 @@ static inline void snd_intel8x0_update(struct intel8x0 *chip, struct ichdev *ich
                         ack = 1;
                 }
         }
-        spin_unlock(&chip->reg_lock);
+        spin_unlock_irqrestore(&chip->reg_lock, flags);
         if (ack && ichdev->substream) {
                 snd_pcm_period_elapsed(ichdev->substream);
         }