{"id":2223391,"url":"http://patchwork.ozlabs.org/api/patches/2223391/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260415081942.4183108-2-chancel.liu@nxp.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","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":"<20260415081942.4183108-2-chancel.liu@nxp.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260415081942.4183108-2-chancel.liu@nxp.com/","date":"2026-04-15T08:19:40","name":"[v2,1/3] ASoC: dapm: Fix widget lookup with prefixed names across DAPM contexts","commit_ref":null,"pull_url":null,"state":"handled-elsewhere","archived":false,"hash":"15c5dd7c9bcebc672c813e391e8d26c0f2afc916","submitter":{"id":84739,"url":"http://patchwork.ozlabs.org/api/people/84739/?format=json","name":"Chancel Liu","email":"chancel.liu@nxp.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260415081942.4183108-2-chancel.liu@nxp.com/mbox/","series":[{"id":499943,"url":"http://patchwork.ozlabs.org/api/series/499943/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499943","date":"2026-04-15T08:19:39","name":"ASoC: soc-core: Add core support for ignoring suspend on selected DAPM widgets","version":2,"mbox":"http://patchwork.ozlabs.org/series/499943/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223391/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223391/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n 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","To":"lgirdwood@gmail.com,\n\tbroonie@kernel.org,\n\tperex@perex.cz,\n\ttiwai@suse.com,\n\tshengjiu.wang@gmail.com,\n\tXiubo.Lee@gmail.com,\n\tfestevam@gmail.com,\n\tnicoleotsuka@gmail.com,\n\tFrank.Li@nxp.com,\n\ts.hauer@pengutronix.de,\n\tkernel@pengutronix.de,\n\tshumingf@realtek.com,\n\trander.wang@linux.intel.com,\n\tpierre-louis.bossart@linux.dev,\n\tlinux-sound@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\timx@lists.linux.dev,\n\tlinux-arm-kernel@lists.infradead.org","Subject":"[PATCH v2 1/3] ASoC: dapm: Fix widget lookup with prefixed names\n across DAPM contexts","Date":"Wed, 15 Apr 2026 17:19:40 +0900","Message-ID":"<20260415081942.4183108-2-chancel.liu@nxp.com>","X-Mailer":"git-send-email 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947c025b-6a3d-4fb0-89c2-08de9ac7dd32","X-MS-Exchange-CrossTenant-AuthSource":"AM9PR04MB8353.eurprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"15 Apr 2026 08:20:33.4555\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"686ea1d3-bc2b-4c6f-a92c-d99c5c301635","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n wqar89p5vbFt4V9JGLwt76jDcvL2oaX5TDYAICVUomiewQsF5fPXYSHVII9xz7Ua9yw8AgBoEPS5rIAzIBgctg==","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"DU4PR04MB10530","X-Spam-Status":"No, score=-0.2 required=3.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,\n\tT_SPF_PERMERROR autolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"Currently dapm_find_widget() manually constructs a prefixed widget name\nbased on the provided DAPM context and compares it using strcmp(). This\nhappens to work in most cases because callers usually know which DAPM\ncontext the target widget belongs to and pass in the matching DAPM\ncontext.\n\nHowever, this assumption breaks when search_other_contexts is enabled.\nIn such cases, callers may intentionally pass a different DAPM context,\nwhile searching for a widget that actually belongs to another DAPM\ncontext.\n\nFor example, when searching for a \"DAC\" widget, the widget belongs to\nthe codec DAPM and be registered with a codec prefix, while the caller\npasses card->dapm and intends to search across all DAPM contexts. The\ncurrent implementation incorrectly applies the caller card DAPM causing\nthe lookup to fail even though the widget exists on the card.\n\nUse snd_soc_dapm_widget_name_cmp() instead, which compares widget names\nusing the widget's own DAPM context and prefix. It fixes widget lookup\nfailures when searching across different DAPM contexts on the card.\n\nFixes: ae4fc532244b (\"ASoC: dapm: use component prefix when checking widget names\")\nSigned-off-by: Chancel Liu \nAssisted-by: Cody:Claude-3.5-Sonnet\n---\n sound/soc/soc-dapm.c | 13 +------------\n 1 file changed, 1 insertion(+), 12 deletions(-)","diff":"diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c\nindex d6192204e613..c5b80d9ed64b 100644\n--- a/sound/soc/soc-dapm.c\n+++ b/sound/soc/soc-dapm.c\n@@ -2906,20 +2906,9 @@ static struct snd_soc_dapm_widget *dapm_find_widget(\n {\n \tstruct snd_soc_dapm_widget *w;\n \tstruct snd_soc_dapm_widget *fallback = NULL;\n-\tchar prefixed_pin[80];\n-\tconst char *pin_name;\n-\tconst char *prefix = dapm_prefix(dapm);\n-\n-\tif (prefix) {\n-\t\tsnprintf(prefixed_pin, sizeof(prefixed_pin), \"%s %s\",\n-\t\t\t prefix, pin);\n-\t\tpin_name = prefixed_pin;\n-\t} else {\n-\t\tpin_name = pin;\n-\t}\n \n \tfor_each_card_widgets(dapm->card, w) {\n-\t\tif (!strcmp(w->name, pin_name)) {\n+\t\tif (!snd_soc_dapm_widget_name_cmp(w, pin)) {\n \t\t\tif (w->dapm == dapm)\n \t\t\t\treturn w;\n \t\t\telse\n","prefixes":["v2","1/3"]}