ALSA: pcm - fix mmap capability check for the snd-dummy driver

The snd-dummy driver (fake_buffer configuration) uses the ops->page
callback for the mmap operations. Allow mmap for this case, too.

Cc: <stable@vger.kernel.org>
Fixes: c4824ae7db41 ("ALSA: pcm: Fix mmap capability check")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210730090254.612478-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 6a2971a7e6a1c6f0b8bac91748b9ccd02d5ed788..09c0e2a6489c4b4700050cf0ed710a456445ccfb 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -246,7 +246,7 @@ static bool hw_support_mmap(struct snd_pcm_substream *substream)
        if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
                return false;
 
-       if (substream->ops->mmap)
+       if (substream->ops->mmap || substream->ops->page)
                return true;
 
        switch (substream->dma_buffer.dev.type) {