diff options
| author | Kangjie Lu <kjlu@umn.edu> | 2019-03-15 06:58:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 10:33:56 +0300 |
| commit | 574469ec6dcfc25c5ae8149fb93cb3dede55ba57 (patch) | |
| tree | 91290d68e328249b5ba2ee5720caa70f5dcd1827 /sound/pci/echoaudio | |
| parent | 0e9bb07a374ae378d45ce0c159504a3a2eb0fe72 (diff) | |
| download | linux-574469ec6dcfc25c5ae8149fb93cb3dede55ba57.tar.xz | |
ALSA: echoaudio: add a check for ioremap_nocache
[ Upstream commit 6ade657d6125ec3ec07f95fa51e28138aef6208f ]
In case ioremap_nocache fails, the fix releases chip and returns
an error code upstream 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>
Diffstat (limited to 'sound/pci/echoaudio')
| -rw-r--r-- | sound/pci/echoaudio/echoaudio.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c index 286f5e3686a3..d73ee11a32bd 100644 --- a/sound/pci/echoaudio/echoaudio.c +++ b/sound/pci/echoaudio/echoaudio.c @@ -1953,6 +1953,11 @@ static int snd_echo_create(struct snd_card *card, } chip->dsp_registers = (volatile u32 __iomem *) ioremap_nocache(chip->dsp_registers_phys, sz); + if (!chip->dsp_registers) { + dev_err(chip->card->dev, "ioremap failed\n"); + snd_echo_free(chip); + return -ENOMEM; + } if (request_irq(pci->irq, snd_echo_interrupt, IRQF_SHARED, KBUILD_MODNAME, chip)) { |