Reviewed-by: Cheng Jian cj.chengjian@huawei.com

在 2021/10/23 21:17, lihao 写道:

From: Takashi Sakamoto o-takashi@sakamocchi.jp

stable inclusion from stable-v5.10.44 commit 98f842951f8aa222e8a8453e6dbce6c056e9984f bugzilla:https://bugzilla.openeuler.org/show_bug.cgi?id=430 CVE: NA

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commit 9981b20a5e3694f4625ab5a1ddc98ce7503f6d12 upstream.

In the workqueue to queue wake-up event, isochronous context is not processed, thus it's useless to check context for the workqueue to switch status of runtime for PCM substream to XRUN. On the other hand, in software IRQ context of 1394 OHCI, it's needed.

This commit fixes the bug introduced when tasklet was replaced with workqueue.

Cc: stable@vger.kernel.org Fixes: 2b3d2987d800 ("ALSA: firewire: Replace tasklet with work") Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp Link: https://lore.kernel.org/r/20210605091054.68866-1-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: lihao 380525608@qq.com

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sound/firewire/amdtp-stream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index e0faa6601966..5805c5de39fb 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -804,7 +804,7 @@ static void generate_pkt_descs(struct amdtp_stream *s, struct pkt_desc *descs, static inline void cancel_stream(struct amdtp_stream *s) { s->packet_index = -1;

• if (current_work() == &s->period_work)

• if (in_interrupt()) amdtp_stream_pcm_abort(s); WRITE_ONCE(s->pcm_buffer_pointer, SNDRV_PCM_POS_XRUN); }