From 5a25de6df789cc805a9b8ba7ab5deef5067af47e Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 13 Aug 2020 15:46:30 +0800
Subject: [PATCH] ALSA: echoaudio: Fix potential Oops in snd_echo_resume()
Git-commit: 5a25de6df789cc805a9b8ba7ab5deef5067af47e
Patch-mainline: v5.9-rc1
References: bsc#1111666
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: 47b5d028fdce8 ("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>
---
sound/pci/echoaudio/echoaudio.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 1b7a67ccabce..a20b2bb5c898 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -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;
--
2.16.4