This is a note to let you know that I've just added the patch titled
ASoC: intel: Fix crash at suspend/resume without card registration
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-intel-fix-crash-at-suspend-resume-without-card-registration.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2fc995a87f2efcd803438f07bfecd35cc3d90d32 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Fri, 25 Nov 2016 16:54:06 +0100
Subject: ASoC: intel: Fix crash at suspend/resume without card registration
From: Takashi Iwai <tiwai@xxxxxxx>
commit 2fc995a87f2efcd803438f07bfecd35cc3d90d32 upstream.
When ASoC Intel SST Medfield driver is probed but without codec / card
assigned, it causes an Oops and freezes the kernel at suspend/resume,
PM: Suspending system (freeze)
Suspending console(s) (use no_console_suspend to debug)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
IP: [<ffffffffc09d9409>] sst_soc_prepare+0x19/0xa0 [snd_soc_sst_mfld_platform]
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 1552 Comm: systemd-sleep Tainted: G W 4.9.0-rc6-1.g5f5c2ad-default #1
Call Trace:
[<ffffffffb45318f9>] dpm_prepare+0x209/0x460
[<ffffffffb4531b61>] dpm_suspend_start+0x11/0x60
[<ffffffffb40d3cc2>] suspend_devices_and_enter+0xb2/0x710
[<ffffffffb40d462e>] pm_suspend+0x30e/0x390
[<ffffffffb40d2eba>] state_store+0x8a/0x90
[<ffffffffb43c670f>] kobj_attr_store+0xf/0x20
[<ffffffffb42b0d97>] sysfs_kf_write+0x37/0x40
[<ffffffffb42b02bc>] kernfs_fop_write+0x11c/0x1b0
[<ffffffffb422be68>] __vfs_write+0x28/0x140
[<ffffffffb43728a8>] ? apparmor_file_permission+0x18/0x20
[<ffffffffb433b2ab>] ? security_file_permission+0x3b/0xc0
[<ffffffffb422d095>] vfs_write+0xb5/0x1a0
[<ffffffffb422e3d6>] SyS_write+0x46/0xa0
[<ffffffffb4719fbb>] entry_SYSCALL_64_fastpath+0x1e/0xad
Add proper NULL checks in the PM code of mdfld driver.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Acked-by: Vinod Koul <vinod.koul@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/intel/atom/sst-mfld-platform-pcm.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -762,6 +762,9 @@ static int sst_soc_prepare(struct device
struct sst_data *drv = dev_get_drvdata(dev);
int i;
+ if (!drv->soc_card)
+ return 0;
+
/* suspend all pcms first */
snd_soc_suspend(drv->soc_card->dev);
snd_soc_poweroff(drv->soc_card->dev);
@@ -784,6 +787,9 @@ static void sst_soc_complete(struct devi
struct sst_data *drv = dev_get_drvdata(dev);
int i;
+ if (!drv->soc_card)
+ return;
+
/* restart SSPs */
for (i = 0; i < drv->soc_card->num_rtd; i++) {
struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-4.4/alsa-hda-ignore-the-assoc-and-seq-when-comparing-pin-configurations.patch
queue-4.4/asoc-intel-fix-crash-at-suspend-resume-without-card-registration.patch
queue-4.4/alsa-hda-when-comparing-pin-configurations-ignore-assoc-in-addition-to-seq.patch
queue-4.4/alsa-hda-ca0132-add-quirk-for-alienware-15-r2-2016.patch
queue-4.4/alsa-hda-gate-the-mic-jack-on-hp-z1-gen3-aio.patch
queue-4.4/alsa-usb-audio-add-quickcam-communicate-deluxe-s7500-to-volume_control_quirks.patch
queue-4.4/alsa-hda-fix-headset-mic-problem-on-a-dell-laptop.patch
queue-4.4/alsa-hiface-fix-m2tech-hiface-driver-sampling-rate-change.patch
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