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Message-Id: <20110928220147.520694867@clark.kroah.org>
Date: Wed, 28 Sep 2011 15:02:54 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Ben Hutchings <ben@...adent.org.uk>,
Takashi Iwai <tiwai@...e.de>
Subject: [210/244] ALSA: fm801: Gracefully handle failure of tuner auto-detect
3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: Ben Hutchings <ben@...adent.org.uk>
commit c37279b92aba2893578f61076cd2eef5c5fa0e99 upstream.
Commit 9676001559fce06e37c7dc230ab275f605556176
("ALSA: fm801: add error handling if auto-detect fails") seems to
break systems that were previously working without a tuner.
As a bonus, this should fix init and cleanup for the case where the
tuner is explicitly disabled.
Reported-and-tested-by: Hor Jiun Shyong <jiunshyong@...il.com>
References: http://bugs.debian.org/641946
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
sound/pci/fm801.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
--- a/sound/pci/fm801.c
+++ b/sound/pci/fm801.c
@@ -68,6 +68,7 @@ MODULE_PARM_DESC(enable, "Enable FM801 s
module_param_array(tea575x_tuner, int, NULL, 0444);
MODULE_PARM_DESC(tea575x_tuner, "TEA575x tuner access method (0 = auto, 1 = SF256-PCS, 2=SF256-PCP, 3=SF64-PCR, 8=disable, +16=tuner-only).");
+#define TUNER_DISABLED (1<<3)
#define TUNER_ONLY (1<<4)
#define TUNER_TYPE_MASK (~TUNER_ONLY & 0xFFFF)
@@ -1150,7 +1151,8 @@ static int snd_fm801_free(struct fm801 *
__end_hw:
#ifdef CONFIG_SND_FM801_TEA575X_BOOL
- snd_tea575x_exit(&chip->tea);
+ if (!(chip->tea575x_tuner & TUNER_DISABLED))
+ snd_tea575x_exit(&chip->tea);
#endif
if (chip->irq >= 0)
free_irq(chip->irq, chip);
@@ -1250,10 +1252,15 @@ static int __devinit snd_fm801_create(st
}
if (tea575x_tuner == 4) {
snd_printk(KERN_ERR "TEA575x radio not found\n");
- return -ENODEV;
+ chip->tea575x_tuner = TUNER_DISABLED;
}
}
- strlcpy(chip->tea.card, snd_fm801_tea575x_gpios[(tea575x_tuner & TUNER_TYPE_MASK) - 1].name, sizeof(chip->tea.card));
+ if (!(chip->tea575x_tuner & TUNER_DISABLED)) {
+ strlcpy(chip->tea.card,
+ snd_fm801_tea575x_gpios[(tea575x_tuner &
+ TUNER_TYPE_MASK) - 1].name,
+ sizeof(chip->tea.card));
+ }
#endif
*rchip = chip;
--
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