From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9ECEF3128B6 for ; Thu, 10 Sep 2026 01:24:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789003445; cv=none; b=V6kVcTbIDDa8LJRFKXpsl+IbQf4Xf1Wc01QaKzRSUSpOBNzuy2zv5LKhU3bq8Nsngj5DdEi83ETIvawy7RVfIP2T56ly10hA0CEYtO1vGLNbKVV/0WlDTENSFz75X8DUDTj4vErGStYTqNikJ5RN2WavgNi5ewgRDNVFxf3r6MU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789003445; c=relaxed/simple; bh=fZ0w3qe8/Nmj7Lzm/kFeSh2lxusIM6eJ24fflpucA1g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ug2X+vn537GpY19bXkhhG3znorl5INJ5IHwuen0OhNufnKWxXtAnCjnxemlCeTVVoisesjL3k4XAFRo7S35WA+O9QYZzFVFIh9mNKTA7Rwp9jHqK5u7i2ZFfxzesgsbktjIR4/sWecvkinCchrDf257EQQQY/qxHFK0giwUtjVY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AioU73Rl; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AioU73Rl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 916891F000FF; Thu, 10 Sep 2026 01:24:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789003444; bh=d2ashPz1ZOKO9yoU2BJ6hwfSKJKL5ngf7L39fiaMtGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AioU73RlJm5CXQijDD2Tr2Wf53qmeziVmTMvNVEZAriXhT8ihbozVgKh18k8tIiD7 2SIQ//v1zfxDUKlv+M4Xx65IF657ohkz9hT3cJEl2q0N8Ikg95gOwCkivmC5fgYZlD UCLUOa3rpR2YjnZYBecjA0nscKoObvlh0txoETjqhTP0DxzrRmziXhoQLh6TI+uxpy mEgLy3Rf6Ar3w18AqUwad3jsWijPKT0bySG3oTnTKy2MSy1BFHcVz4+4pYC0SY9gJ/ fjxan4tzyNHOF4vA+K2+PsgMtwJHCcHWLkJo7PKJzuQrB/KZPFSePFJTcajLGnPQa/ +EDuIdAj5h3QA== From: Sasha Levin To: stable@vger.kernel.org Cc: Adrian Hunter , Frank Li , Mukesh Savaliya , Alexandre Belloni , Sasha Levin Subject: [PATCH 5.15.y] i3c: master: Do not treat master device as a duplicate target Date: Wed, 9 Sep 2026 21:24:01 -0400 Message-ID: <20260910012401.3854605-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026090412-disarm-stranger-9a23@gregkh> References: <2026090412-disarm-stranger-9a23@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Adrian Hunter [ Upstream commit 4dc1b3eeba7991905a5b5b8129ebea51be7d87b7 ] i3c_master_search_i3c_dev_duplicate() searches the bus for another I3C device with the same PID as the reference device. The search can match master->this, causing the controller itself to be returned as a duplicate. Since the controller is not a target device, it cannot be a duplicate of one. Exclude master->this from matching so that the function only returns real duplicate target devices. Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Cc: stable@vger.kernel.org Signed-off-by: Adrian Hunter Reviewed-by: Frank Li Acked-by: Mukesh Savaliya Link: https://patch.msgid.link/20260807145638.168865-4-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni [ adjusted the duplicate-device comparison to match the older branch’s PID handling without nonzero-PID checks. ] Signed-off-by: Sasha Levin --- drivers/i3c/master.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index add78b03c5338..af55b881d33ce 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -1828,7 +1828,8 @@ i3c_master_search_i3c_dev_duplicate(struct i3c_dev_desc *refdev) struct i3c_dev_desc *i3cdev; i3c_bus_for_each_i3cdev(&master->bus, i3cdev) { - if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid) + if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid && + i3cdev != master->this) return i3cdev; } -- 2.53.0