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ALSA: sb8: add a check for request_region
[ Upstream commit dcd0feac9b
]
In case request_region fails, the fix returns an error code to
avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -111,6 +111,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
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/* block the 0x388 port to avoid PnP conflicts */
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acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
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if (!acard->fm_res) {
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err = -EBUSY;
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goto _err;
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}
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if (port[dev] != SNDRV_AUTO_PORT) {
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if ((err = snd_sbdsp_create(card, port[dev], irq[dev],
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