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ALSA: hda_intel: add card number to irq description

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Currently the info in /proc/interrupts doesn't allow to figure out which
interrupt belongs to which card (HDMI, PCH, ..).
Therefore add card details to the interrupt description.
With the patch the info in /proc/interrupts looks like this:

PCI-MSI 442368-edge      snd_hda_intel:card1
PCI-MSI 49152-edge      snd_hda_intel:card0

NOTE: this patch adds the new irq_descr field snd_card struct that is
filled automatically at a card object creation.  This can be used
generically for other drivers as well.  The changes for others will
follow later -- tiwai

Signed-off-by: Heiner Kallweit <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Heiner Kallweit 2015-12-22 19:09:05 +01:00 • committed by Takashi Iwai
commit de65360be0
3 changed files with 5 additions and 1 deletions
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3
sound/core/init.c
View file

@ -268,6 +268,9 @@ int snd_card_new(struct device *parent, int idx, const char *xid,
if (err < 0)
goto __error;
snprintf(card->irq_descr, sizeof(card->irq_descr), "%s:%s",
dev_driver_string(card->dev), dev_name(&card->card_dev));
/* the control interface cannot be accessed from the user space until */
/* snd_cards_bitmask and snd_cards are set with snd_card_register */
err = snd_ctl_create(card);

2
sound/pci/hda/hda_intel.c
View file

@ -725,7 +725,7 @@ static int azx_acquire_irq(struct azx *chip, int do_disconnect)
if (request_irq(chip->pci->irq, azx_interrupt,
chip->msi ? 0 : IRQF_SHARED,
KBUILD_MODNAME, chip)) {
chip->card->irq_descr, chip)) {
dev_err(chip->card->dev,
"unable to grab IRQ %d, disabling device\n",
chip->pci->irq);