[alsa-devel] [patch] ALSA: fm801: add error handling if auto-detect fails
In the original code if auto detect failed and tea575x_tuner == 4 then we copy bogus information to chip->tea.card. I've changed the autodetect code to cleanup and return -ENODEV on error instead.
I made the previous chunk return on error as well. Potentially the hardware should limp along without the radio? I don't know this hardware well enough to say.
Signed-off-by: Dan Carpenter error27@gmail.com --- Compile tested only.
diff --git a/sound/pci/fm801.c b/sound/pci/fm801.c index eacd490..a7ec703 100644 --- a/sound/pci/fm801.c +++ b/sound/pci/fm801.c @@ -1234,9 +1234,12 @@ static int __devinit snd_fm801_create(struct snd_card *card, sprintf(chip->tea.bus_info, "PCI:%s", pci_name(pci)); if ((tea575x_tuner & TUNER_TYPE_MASK) > 0 && (tea575x_tuner & TUNER_TYPE_MASK) < 4) { - if (snd_tea575x_init(&chip->tea)) + if (snd_tea575x_init(&chip->tea)) { snd_printk(KERN_ERR "TEA575x radio not found\n"); - } else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0) + snd_fm801_free(chip); + return -ENODEV; + } + } else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0) { /* autodetect tuner connection */ for (tea575x_tuner = 1; tea575x_tuner <= 3; tea575x_tuner++) { chip->tea575x_tuner = tea575x_tuner; @@ -1246,6 +1249,12 @@ static int __devinit snd_fm801_create(struct snd_card *card, break; } } + if (tea575x_tuner == 4) { + snd_printk(KERN_ERR "TEA575x radio not found\n"); + snd_fm801_free(chip); + return -ENODEV; + } + } strlcpy(chip->tea.card, snd_fm801_tea575x_gpios[(tea575x_tuner & TUNER_TYPE_MASK) - 1].name, sizeof(chip->tea.card)); #endif
At Thu, 26 May 2011 11:47:35 +0300, Dan Carpenter wrote:
In the original code if auto detect failed and tea575x_tuner == 4 then we copy bogus information to chip->tea.card. I've changed the autodetect code to cleanup and return -ENODEV on error instead.
I made the previous chunk return on error as well. Potentially the hardware should limp along without the radio? I don't know this hardware well enough to say.
Signed-off-by: Dan Carpenter error27@gmail.com
Looks good to me. Applied now.
thanks,
Takashi
Compile tested only.
diff --git a/sound/pci/fm801.c b/sound/pci/fm801.c index eacd490..a7ec703 100644 --- a/sound/pci/fm801.c +++ b/sound/pci/fm801.c @@ -1234,9 +1234,12 @@ static int __devinit snd_fm801_create(struct snd_card *card, sprintf(chip->tea.bus_info, "PCI:%s", pci_name(pci)); if ((tea575x_tuner & TUNER_TYPE_MASK) > 0 && (tea575x_tuner & TUNER_TYPE_MASK) < 4) {
if (snd_tea575x_init(&chip->tea))
if (snd_tea575x_init(&chip->tea)) { snd_printk(KERN_ERR "TEA575x radio not found\n");
- } else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0)
snd_fm801_free(chip);
return -ENODEV;
}
- } else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0) { /* autodetect tuner connection */ for (tea575x_tuner = 1; tea575x_tuner <= 3; tea575x_tuner++) { chip->tea575x_tuner = tea575x_tuner;
@@ -1246,6 +1249,12 @@ static int __devinit snd_fm801_create(struct snd_card *card, break; } }
if (tea575x_tuner == 4) {
snd_printk(KERN_ERR "TEA575x radio not found\n");
snd_fm801_free(chip);
return -ENODEV;
}
- } strlcpy(chip->tea.card, snd_fm801_tea575x_gpios[(tea575x_tuner & TUNER_TYPE_MASK) - 1].name, sizeof(chip->tea.card));
#endif
participants (2)
-
Dan Carpenter
-
Takashi Iwai