From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f174.google.com (mail-dy1-f174.google.com [74.125.82.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61B934BE430 for ; Wed, 30 Sep 2026 23:46:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790812018; cv=none; b=OTImN6mYLiDrmsfVPSxRG+NXLO32ZMeD1TkuUz/Nz2N56azWXkqzDIap/L3I4mmSBhooeZXAMCoQfVxoNeCZXngcNUfhMua1mk1HFYgHi9Yrl8brGF7QEMgTW8qDG72kTTZvp2vXte4lp+z8KyV5HO3SSuj0FR1ESztcUmyyHIE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790812018; c=relaxed/simple; bh=J04w6m736rx7ewf6/jKvl5BzfuXA+8hHFvMZDOWRIOI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gErVIazpxuBm+yzaBz/ZaMQYxtvZ98FjXWvA4USAZ2bMlM29J5kXfdD+ChFPGHyR8VcW1HlhKg788WzstHVt9E7uChMdBqYl3lr8F2pRU8VAUCUbO7vcS5Y6wTub9TdjPqB9fLfwhfbCa4mEwvM1erdNdjHf/IM1aM9vNIeKq9w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=gl0GQQvK; arc=none smtp.client-ip=74.125.82.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gl0GQQvK" Received: by mail-dy1-f174.google.com with SMTP id 5a478bee46e88-3410209aa6aso167963eec.1 for ; Wed, 30 Sep 2026 16:46:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790812015; x=1791416815; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=Nu8Cl9d5kdkeLBWfcAAawSaGHAduQcU752rXCWMacQA=; b=gl0GQQvKsHGa+qinYpbejun2ZIuRVObrIdiBVMMPkhDQcTlVUCljxvV65p1da5ayM1 gUp3lKGysnDQOLFG8TahRa3CXTeS7omggEBs4g3D0mP4VEvtEHKo8g630RxQkF5JO12h qc1Pwc+rkQ0itiw3Vsy2/reUJ3zhxIiFcAVLuxv+Nkuemlj5sjNnNOtyIgfL3jfulQsU X7simCfILBw3pa/Y/4G1sEpRAqmd7JO4r3vCbPM51cIjtSeMYsrP3evDtcl64WvFMIVw T9Uv62qg8YnI0jJKIZU1kCcDoCntdSk5AaGyVMwJ6l+YuekyUnl1opXOwilsiRAVfTCK kvYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790812015; x=1791416815; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=Nu8Cl9d5kdkeLBWfcAAawSaGHAduQcU752rXCWMacQA=; b=1KcqFzOfuOwO7NIYOuzGDcZooUOH4ckH5wFdDZNAaTblceA6RqhrkJyDXgh/53GQY2 ++KCYL9BQ6+p/Vy+f8CSGZNqcfeMOt//N6vjPfhBjVgX0eh1u0SpxWeYiucGgmeK1vkb 2+eaWxZ++EbRlom3f6ZnIR62S1uNeTkED/W6Sd6b1+/OQWWViYcCrxSoXQ8MMFTTxZz1 9fpJAXnyuNq2kIXpaqDwQPaQyXHISS3+R9v0UglkVrmXVBiDDKOZpDUEfFUJH1ru4ivc V7BsXYdIjbwMqs9s9NB1IAxZA+JkmX0oB7S/OiLw+Wo4cO+JFnIpiuDn4Z1ZuDAHe95Q xuMQ== X-Forwarded-Encrypted: i=1; AKwUvBx2gUJbEL/fSaQu0LsUL/2S6nZ1R5U63xn8wt1aLClUQR9FOd7AqHcBCdIjk3Ux7VWCZtSOuKuc9uQ=@vger.kernel.org X-Gm-Message-State: AFuF++lPT2aDkG6G01v7U9tc60mPWL5yIr8J/JF6KDOQ/Y0jOeWf62qS kQTkUT6o0Q+Ah41m1gyJ4EDIam/r1WHz9RFlNioZXZnyIpxQeUJv1rcn X-Gm-Gg: AYBFou3ZPkxsT4z3P9RnUUadJNi/57hFZLtFy/kld/ihyHsE0w79nGxQvT8tzdfEvwH go3jMByao93W0Hlm98dV6qhwpj0QtusJ67p+VqEnEAPJ90iTtYf6KiANSdLUkXrizamd6bOjcDF tURAGYbSiKYNJ3Bl/240dEuzQtEzaCI3zgbtWVzpJpDzs2zLUmsD2+t2CIlUKHDzjNx6M43Vrmf rNvGpykrZS9lOHrTNwZek6L6IQ24QWsw0xQASXafnrnPQCelhmloepSjTrSSnDy4vsmzucSBckd yur74gTQoSMHz4NZBTGtraSv+CqmvsLWCVlmYMRBXSnorp74KR/1Y2MBIXiEzo9Z0+fr/wAXA4k 2nOGB4tNAGwJ6GBcEqDIGlO4mJYJoJZTqeKrAe3pT5/oYNkOIUzwQj1CHzHOBl0gu7eBRop4Xoe XW/amD3f3nys9dDSZnKyb6zNp013i6dwjYlzG+5vLkglbcNZjvRk0X9FTI6pR4KGavFctme64TP VwbBpNEbRykNLMdShYSs/3LCjCNjnef38gUFaIoOEvUQUE= X-Received: by 2002:a05:7022:281:20b0:146:84fd:7b58 with SMTP id a92af1059eb24-14dd07fca11mr934446c88.9.1790812015144; Wed, 30 Sep 2026 16:46:55 -0700 (PDT) Received: from Gris-Laptop (gia.grisge.info. [67.230.185.89]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-14df359ee25sm1768367c88.5.2026.09.30.16.46.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 16:46:54 -0700 (PDT) From: Gris Ge To: Heikki Krogerus , Greg Kroah-Hartman Cc: Gris Ge , stable@vger.kernel.org, Benson Leung , Andrei Kuchynski , Abel Vesa , Pooja Katiyar , Jameson Thies , Hsin-Te Yuan , Johan Hovold , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] usb: typec: ucsi: Skip CAM query when partner has no alt modes Date: Thu, 1 Oct 2026 07:46:08 +0800 Message-ID: <20260930234611.468765-2-cnfourt@gmail.com> X-Mailer: git-send-email 2.56.0 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Since Thunderbolt alternate mode support was added, `ucsi_altmode_update_active()` is called on every Connector Partner Changed event. This made the driver send `UCSI_GET_CURRENT_CAM` to PPMs even when the partner had no alternate modes registered. Firmware that does not support the optional alternate mode details answered Not Supported, which produced a spurious error on every partner change: ``` ucsi_acpi USBC000:00: GET_CURRENT_CAM command failed ``` Fixed by skipping the command when there is nothing to update. Fixes: da87d45b1951 ("usb: typec: ucsi: Add Thunderbolt alternate mode support") Cc: stable@vger.kernel.org # v7.0+ Assisted-by: Codex:deepseek-v4.1-flash Signed-off-by: Gris Ge --- v2: - skip the invoke of `ucsi_altmode_update_active()` in `ucsi_handle_connector_change()` v1: https://lore.kernel.org/linux-usb/20260927021649.8967-1-cnfourt@gmail.com/ drivers/usb/typec/ucsi/ucsi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index bef3f9b71d71..c392afdc27ae 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -1519,7 +1519,8 @@ static void ucsi_handle_connector_change(struct work_struct *work) if (con->partner && (change & UCSI_CONSTAT_PARTNER_CHANGE)) { ucsi_partner_change(con); - ucsi_altmode_update_active(con); + if (con->partner_altmode[0]) + ucsi_altmode_update_active(con); /* Complete pending data role swap */ if (!completion_done(&con->complete)) -- 2.55.0