linux-kernel - [PATCH 5.13 083/175] ALSA: pcm - fix mmap capability check for the snd-dummy driver

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Message-Id: <20210810173003.676139587@linuxfoundation.org>
Date:   Tue, 10 Aug 2021 19:29:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 5.13 083/175] ALSA: pcm - fix mmap capability check for the snd-dummy driver

From: Jaroslav Kysela <perex@...ex.cz>

commit 852a8a97776a153be2e6c803218eced45f37a19c upstream.

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

Cc: <stable@...r.kernel.org>
Fixes: c4824ae7db41 ("ALSA: pcm: Fix mmap capability check")
Signed-off-by: Jaroslav Kysela <perex@...ex.cz>
Link: https://lore.kernel.org/r/20210730090254.612478-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/core/pcm_native.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -246,7 +246,7 @@ static bool hw_support_mmap(struct snd_p
 	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) {