linux-kernel - [PATCH 06/10 v2] ALSA: msnd: check request

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Message-Id: <1280400325-9405-1-git-send-email-segooon@gmail.com>
Date:	Thu, 29 Jul 2010 14:45:24 +0400
From:	Kulikov Vasiliy <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH 06/10 v2] ALSA: msnd: check request_region() return value

request_region() may fail, if so return -EBUSY.

Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
---
 sound/isa/msnd/msnd_pinnacle.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/sound/isa/msnd/msnd_pinnacle.c b/sound/isa/msnd/msnd_pinnacle.c
index 60b6abd..ed42f8e 100644
--- a/sound/isa/msnd/msnd_pinnacle.c
+++ b/sound/isa/msnd/msnd_pinnacle.c
@@ -549,7 +549,10 @@ static int __devinit snd_msnd_attach(struct snd_card *card)
 		printk(KERN_ERR LOGNAME ": Couldn't grab IRQ %d\n", chip->irq);
 		return err;
 	}
-	request_region(chip->io, DSP_NUMIO, card->shortname);
+	if (request_region(chip->io, DSP_NUMIO, card->shortname) == NULL) {
+		free_irq(chip->irq, chip);
+		return -EBUSY;
+	}
 
 	if (!request_mem_region(chip->base, BUFFSIZE, card->shortname)) {
 		printk(KERN_ERR LOGNAME
-- 
1.7.0.4

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