On Wed, 23 Dec 2015 08:57:27 +0100, Heiner Kallweit wrote:
On Wed, Dec 23, 2015 at 8:40 AM, Takashi Iwai tiwai@suse.de wrote:
On Tue, 22 Dec 2015 19:09:05 +0100, Heiner Kallweit wrote:
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
Signed-off-by: Heiner Kallweit hkallweit1@gmail.com
v2: Make extension more generic and implement it in snd_card. This way every driver using struct snd_card can easily be switched to using the more descriptive irq describer.
Thanks, the patch looks good to me, but I have a small hesitation to add such a new filed blindly to snd_card struct. Although it's relatively small (32 bytes), it's not zero, after all.
Maybe we'll take this approach in the end, I guess, but let's see whether this rings bell to others.
We could also allocate the irq describer dynamically with kasprintf or devm_kasprintf and just add a pointer to snd_card struct. This would save us a few bytes, question is whether it's worth it.
Yes, that's my first idea, too. But this will end up eating more bytes totally.
Takashi
I'm open to any suggestion.
Heiner
Takashi
include/sound/core.h | 1 + sound/core/init.c | 3 +++ sound/pci/hda/hda_intel.c | 2 +- 3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/sound/core.h b/include/sound/core.h index cdfecaf..31079ea 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -99,6 +99,7 @@ struct snd_card { char driver[16]; /* driver name */ char shortname[32]; /* short name of this soundcard */ char longname[80]; /* name of this soundcard */
char irq_descr[32]; /* Interrupt description */ char mixername[80]; /* mixer name */ char components[128]; /* card components delimited with space */diff --git a/sound/core/init.c b/sound/core/init.c index 20f37fb..6bda843 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -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);diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 83800ac..c0bef11 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -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);-- 2.6.4