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Subject[PATCH 2/2 v2] ALSA: hda - Deferred probing with request_firmware_nowait()
For processing the firmware handling properly for built-in kernels,
implement an asynchronous f/w loading with request_firmware_nowait().
This means that the codec probing is deferred when the patch option is
specified.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
v1->v2: drop superfluous chip->probe_deferred field

sound/pci/hda/hda_codec.c | 2 +-
sound/pci/hda/hda_intel.c | 41 +++++++++++++++++++++++++++++++++++++----
2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 88a9c20..408babc 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -4184,7 +4184,7 @@ int snd_hda_codec_build_pcms(struct hda_codec *codec)
*
* This function returns 0 if successful, or a negative error code.
*/
-int __devinit snd_hda_build_pcms(struct hda_bus *bus)
+int snd_hda_build_pcms(struct hda_bus *bus)
{
struct hda_codec *codec;

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b25d539..717acb4 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -564,13 +564,17 @@ enum {
* VGA-switcher support
*/
#ifdef SUPPORT_VGA_SWITCHEROO
+#define use_vga_switcheroo(chip) ((chip)->use_vga_switcheroo)
+#else
+#define use_vga_switcheroo(chip) 0
+#endif
+
+#if defined(SUPPORT_VGA_SWITCHEROO) || defined(CONFIG_SND_HDA_PATCH_LOADER)
#define DELAYED_INIT_MARK
#define DELAYED_INITDATA_MARK
-#define use_vga_switcheroo(chip) ((chip)->use_vga_switcheroo)
#else
#define DELAYED_INIT_MARK __devinit
#define DELAYED_INITDATA_MARK __devinitdata
-#define use_vga_switcheroo(chip) 0
#endif

static char *driver_short_names[] DELAYED_INITDATA_MARK = {
@@ -3155,12 +3159,37 @@ static void power_down_all_codecs(struct azx *chip)
#endif
}

+/* callback from request_firmware_nowait() */
+static void azx_firmware_cb(const struct firmware *fw, void *context)
+{
+ struct snd_card *card = context;
+ struct azx *chip = card->private_data;
+ struct pci_dev *pci = chip->pci;
+
+ if (!fw) {
+ snd_printk(KERN_ERR SFX "Cannot load firmware, aborting\n");
+ goto error;
+ }
+
+ if (!chip->disabled) {
+ /* continue probing */
+ if (azx_probe_continue(chip))
+ goto error;
+ }
+ return; /* OK */
+
+ error:
+ snd_card_free(card);
+ pci_set_drvdata(pci, NULL);
+}
+
static int __devinit azx_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct azx *chip;
+ bool probe_deferred;
int err;

if (dev >= SNDRV_CARDS)
@@ -3182,18 +3211,22 @@ static int __devinit azx_probe(struct pci_dev *pci,
if (err < 0)
goto out_free;
card->private_data = chip;
+ probe_deferred = chip->disabled;

#ifdef CONFIG_SND_HDA_PATCH_LOADER
if (patch[dev] && *patch[dev]) {
snd_printk(KERN_ERR SFX "Applying patch firmware '%s'\n",
patch[dev]);
- err = request_firmware(&chip->fw, patch[dev], &pci->dev);
+ err = request_firmware_nowait(THIS_MODULE, true, patch[dev],
+ &pci->dev, GFP_KERNEL, card,
+ azx_firmware_cb);
if (err < 0)
goto out_free;
+ probe_deferred = true;
}
#endif /* CONFIG_SND_HDA_PATCH_LOADER */

- if (!chip->disabled) {
+ if (!probe_deferred) {
err = azx_probe_continue(chip);
if (err < 0)
goto out_free;
--
1.7.11.4


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