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ALSA: echoaudio: Fix potential Oops in snd_echo_resume()

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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 #2")
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>
This commit is contained in:
Dinghao Liu 2020-08-13 15:46:30 +08:00 committed by Takashi Iwai
parent d96f27c80b
commit 5a25de6df7
1 changed files with 0 additions and 2 deletions
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sound/pci/echoaudio/echoaudio.c
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@ -2212,7 +2212,6 @@ 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;
}
@ -2239,7 +2238,6 @@ 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;