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Commit 67089137 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: pcm: Add missing error checks in OSS emulation plugin builder 



In the OSS emulation plugin builder where the frame size is parsed in
the plugin chain, some places miss the possible errors returned from
the plugin src_ or dst_frames callback.

This patch papers over such places.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent fe08f34d

sound/core/oss/pcm_plugin.c

+11 −3
Original line number Diff line number Diff line
@@ -592,18 +592,26 @@ snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, st 
	snd_pcm_sframes_t frames = size;



	plugin = snd_pcm_plug_first(plug);

	while (plugin && frames > 0) {

	while (plugin) {

		if (frames <= 0)

			return frames;

		if ((next = plugin->next) != NULL) {

			snd_pcm_sframes_t frames1 = frames;

			if (plugin->dst_frames)

			if (plugin->dst_frames) {

				frames1 = plugin->dst_frames(plugin, frames);

				if (frames1 <= 0)

					return frames1;

			}

			if ((err = next->client_channels(next, frames1, &dst_channels)) < 0) {

				return err;

			}

			if (err != frames1) {

				frames = err;

				if (plugin->src_frames)

				if (plugin->src_frames) {

					frames = plugin->src_frames(plugin, frames1);

					if (frames <= 0)

						return frames;

				}

			}

		} else

			dst_channels = NULL;