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ALSA: echoaudio: Fix potential Oops in snd_echo_resume()

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[ Upstream commit 5a25de6df789cc805a9b8ba7ab5deef5067af47e ]

Freeing chip on error may lead to an Oops at the next time
the system goes to resume. Fix this by removing all
snd_echo_free() calls on error.

Fixes: 47b5d028fd ("ALSA: Echoaudio - Add suspend support ")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20200813074632.17022-1-dinghao.liu@zju.edu.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dinghao Liu 2020-08-13 15:46:30 +08:00 • committed by Greg Kroah-Hartman
parent 5954785148
commit 9a1b7ced0f
1 changed files with 0 additions and 2 deletions

2
sound/pci/echoaudio/echoaudio.c
View file

@ -2216,7 +2216,6 @@ static int snd_echo_resume(struct device *dev)
if (err < 0) {
kfree(commpage_bak);
dev_err(dev, "resume init_hw err=%d\n", err);
snd_echo_free(chip);
return err;
}
@ -2243,7 +2242,6 @@ static int snd_echo_resume(struct device *dev)
if (request_irq(pci->irq, snd_echo_interrupt, IRQF_SHARED,
KBUILD_MODNAME, chip)) {
dev_err(chip->card->dev, "cannot grab irq\n");
snd_echo_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;