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| author | Takashi Iwai <tiwai@suse.de> | 2009-06-02 10:40:51 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-06-02 10:40:51 +0400 |
| commit | 8a4259bf89d23bfd58d87e275ef6da29cea6b3c5 (patch) | |
| tree | ee96ea01ae32a828f1446f52bd2534783e0c8dfd /sound/pci/ctxfi/ctvmem.h | |
| parent | aae80dc24aeddec4e2b6e182a43491942f8667d3 (diff) | |
| download | linux-8a4259bf89d23bfd58d87e275ef6da29cea6b3c5.tar.xz | |
ALSA: ctxfi - Fix Oops at mmapping
Replace a spinlock with a mutex protecting the vm block list at
mmap / munmap calls, which caused Oops like below:
BUG: sleeping function called from invalid context at mm/slub.c:1599
in_atomic(): 0, irqs_disabled(): 1, pid: 32065, name: xine
Pid: 32065, comm: xine Tainted: P 2.6.29.4-75.fc10.x86_64 #1
Call Trace:
[<ffffffff81040685>] __might_sleep+0x105/0x10a
[<ffffffff810c9fae>] kmem_cache_alloc+0x32/0xe2
[<ffffffffa08e3110>] ct_vm_map+0xfa/0x19e [snd_ctxfi]
[<ffffffffa08e1a07>] ct_map_audio_buffer+0x4c/0x76 [snd_ctxfi]
[<ffffffffa08e2aa5>] atc_pcm_playback_prepare+0x1d7/0x2a8 [snd_ctxfi]
[<ffffffff8105ef3f>] ? up_read+0x9/0xb
[<ffffffff81186b61>] ? __up_read+0x7c/0x87
[<ffffffffa08e36a6>] ct_pcm_playback_prepare+0x39/0x60 [snd_ctxfi]
[<ffffffffa0886bcb>] snd_pcm_do_prepare+0x16/0x28 [snd_pcm]
[<ffffffffa08867c7>] snd_pcm_action_single+0x2d/0x5b [snd_pcm]
[<ffffffffa08881f3>] snd_pcm_action_nonatomic+0x52/0x6a [snd_pcm]
[<ffffffffa088a723>] snd_pcm_common_ioctl1+0x404/0xc79 [snd_pcm]
[<ffffffff810c52c8>] ? alloc_pages_current+0xb9/0xc2
[<ffffffff810c9402>] ? new_slab+0x1a5/0x1cb
[<ffffffff810ab9ea>] ? vma_prio_tree_insert+0x23/0xc1
[<ffffffffa088b411>] snd_pcm_playback_ioctl1+0x213/0x230 [snd_pcm]
[<ffffffff810b6c20>] ? mmap_region+0x397/0x4c9
[<ffffffffa088bd9b>] snd_pcm_playback_ioctl+0x2e/0x36 [snd_pcm]
[<ffffffff810ddc64>] vfs_ioctl+0x2a/0x78
[<ffffffff810de130>] do_vfs_ioctl+0x462/0x4a2
[<ffffffff81029cef>] ? default_spin_lock_flags+0x9/0xe
[<ffffffff81374647>] ? trace_hardirqs_off_thunk+0x3a/0x6c
[<ffffffff810de1c5>] sys_ioctl+0x55/0x77
[<ffffffff8101133a>] system_call_fastpath+0x16/0x1b
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/ctxfi/ctvmem.h')
| -rw-r--r-- | sound/pci/ctxfi/ctvmem.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h index 4eb5bdd5cad4..618952efa5b3 100644 --- a/sound/pci/ctxfi/ctvmem.h +++ b/sound/pci/ctxfi/ctvmem.h @@ -20,7 +20,7 @@ #define CT_PTP_NUM 1 /* num of device page table pages */ -#include <linux/spinlock.h> +#include <linux/mutex.h> #include <linux/list.h> struct ct_vm_block { @@ -35,6 +35,7 @@ struct ct_vm { unsigned int size; /* Available addr space in bytes */ struct list_head unused; /* List of unused blocks */ struct list_head used; /* List of used blocks */ + struct mutex lock; /* Map host addr (kmalloced/vmalloced) to device logical addr. */ struct ct_vm_block *(*map)(struct ct_vm *, void *host_addr, int size); |