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authorTakashi Iwai <tiwai@suse.de>2021-07-20 11:27:32 +0200
committerTakashi Iwai <tiwai@suse.de>2021-07-20 11:28:33 +0200
commitd371588910715ebf7fa8e3a5d21ea5169c852927 (patch)
tree2aaaa293a5c9cc4f7160375344217c91c2cbfce9 /sound/core
parentc4824ae7db418aee6f50f308a20b832e58e997fd (diff)
ALSA: pcm: Fix mmap without buffer preallocation
The recent rewrite of the memory allocation helpers also changed the page extraction to a common helper, snd_sgbuf_get_page(). But this assumes implicitly that the buffer was allocated via the standard helper (usually via preallocation), and didn't consider the case of the manual buffer handling. This patch fixes it and also covers the manual buffer management. Fixes: 37af81c5998f ("ALSA: core: Abstract memory alloc helpers") Link: https://lore.kernel.org/r/20210720092732.12412-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/pcm_native.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 6919d2943b9d..6a2971a7e6a1 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3675,6 +3675,8 @@ static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
return VM_FAULT_SIGBUS;
if (substream->ops->page)
page = substream->ops->page(substream, offset);
+ else if (!snd_pcm_get_dma_buf(substream))
+ page = virt_to_page(runtime->dma_area + offset);
else
page = snd_sgbuf_get_page(snd_pcm_get_dma_buf(substream), offset);
if (!page)