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GET /api/patches/2195330/?format=api
{ "id": 2195330, "url": "http://patchwork.ozlabs.org/api/patches/2195330/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260210185714.556385-1-n7l8m4@u.northwestern.edu/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260210185714.556385-1-n7l8m4@u.northwestern.edu>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260210185714.556385-1-n7l8m4@u.northwestern.edu/", "date": "2026-02-10T18:57:14", "name": "[v2] ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ac01429fbc0270754e1b4f688bdb15f14854e80d", "submitter": { "id": 92561, "url": "http://patchwork.ozlabs.org/api/people/92561/?format=api", "name": "Ziyi Guo", "email": "n7l8m4@u.northwestern.edu" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260210185714.556385-1-n7l8m4@u.northwestern.edu/mbox/", "series": [ { "id": 491729, "url": "http://patchwork.ozlabs.org/api/series/491729/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=491729", "date": "2026-02-10T18:57:14", "name": "[v2] ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/491729/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2195330/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2195330/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-16787-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=u-northwestern-edu.20230601.gappssmtp.com\n header.i=@u-northwestern-edu.20230601.gappssmtp.com header.a=rsa-sha256\n header.s=20230601 header.b=iHgD1jpj;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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However, this function is called from the upper ALSA\ncore function snd_ctl_elem_write(), which already holds the write lock on\ncontrols_rwsem for the whole put operation. So there is no need to simply\nhold the lock for fsl_xcvr_activate_ctl() again.\n\nAcquiring the read lock while holding the write lock in the same thread\nresults in a deadlock and a hung task, as reported by Alexander Stein.\n\nReported-by: Alexander Stein <alexander.stein@ew.tq-group.com>\nCloses: https://lore.kernel.org/linux-sound/5056506.GXAFRqVoOG@steina-w/\nSigned-off-by: Ziyi Guo <n7l8m4@u.northwestern.edu>\n---\nv2:\n - Refactor subject line style\n - Include human readable descriptions\n - Fix the sha1 information for sound/soc/fsl/fsl_xcvr.c\n\n sound/soc/fsl/fsl_xcvr.c | 3 ---\n 1 file changed, 3 deletions(-)", "diff": "diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c\nindex 5de93f458b56..a268fb81a2f8 100644\n--- a/sound/soc/fsl/fsl_xcvr.c\n+++ b/sound/soc/fsl/fsl_xcvr.c\n@@ -223,13 +223,10 @@ static int fsl_xcvr_mode_put(struct snd_kcontrol *kcontrol,\n \n \txcvr->mode = snd_soc_enum_item_to_val(e, item[0]);\n \n-\tdown_read(&card->snd_card->controls_rwsem);\n \tfsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name,\n \t\t\t (xcvr->mode == FSL_XCVR_MODE_ARC));\n \tfsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name,\n \t\t\t (xcvr->mode == FSL_XCVR_MODE_EARC));\n-\tup_read(&card->snd_card->controls_rwsem);\n-\n \t/* Allow playback for SPDIF only */\n \trtd = snd_soc_get_pcm_runtime(card, card->dai_link);\n \trtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count =\n", "prefixes": [ "v2" ] }