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 E309B26738C for ; Thu, 10 Sep 2026 01:02:13 +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=1789002135; cv=none; b=FfH6DmfUWjYtHdYlDjnjghljyFEZbhGLrDMNIpGTIHZnFeQ18+DG0Ian9CY4e9YihBsPUVrAUlcrwtFSvuM6vT/6YIz7xSmbBlz5jwG0S6qcthJ2gpoTH2CU4+GJcocyK0wbWXv8DMdjTYVj6boGt4/XaxrA0h+5wZUKp9wfH3k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789002135; c=relaxed/simple; bh=BqvSXRj+bLgSt8JBXuS7ni8QFOHc2F8qN1x/7fZkXEw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NGJU7n5ylIuJJ+19rA0vyx2SVGSaMZ7chbWfD+in5J0lfH+Uete3E9/ubkfpK5b++CIlQoMP0ZDstMdaIKIsxdlJsa3YB8WuCo6P03UtmsXTlnsD68fgljBTv3pc4bbfyEftlPfYvgMCE0I0sceVW3QdWUVZOm8+Niq+jpmhZAI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B4aGeC8Y; 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="B4aGeC8Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AD10E1F000FF; Thu, 10 Sep 2026 01:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789002133; bh=5ExV1/Fia8KgFi5A3Q6YoEXQLrza8LgIKK8odkL1Yig=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=B4aGeC8Y4e/o9J6xcozbbeQ0XBzoVMAJ9RpBYcjIklcX1suGOVk/99kRKyJHRFG80 L2/JA5Pi6OUBHOOYTypruasssBXEztMJQTmEhzaIaUCEgtR7cn2fbUG95vWvP004DH jE1gLtaWQwt3txezFJT+vw3jNgZSiTIka+6Xy5NK+gHNV7O5WjdxWojNt43P/76Sut duqP4b+EKngogQwkBef51fuKjmiRj9I0tZmZSRdtbnaruRWyboo+tDlSTNN37mfbS2 jOdLcRzrqJd0U1Dx5mUvqRZ4AH7/MKlbqtrMslkLfnDzogmzQYdPzPaVqgXoj/89+Y Uww3rvMnjczMQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Adrian Hunter , Frank Li , Mukesh Savaliya , Alexandre Belloni , Sasha Levin Subject: [PATCH 6.12.y] i3c: master: Do not treat master device as a duplicate target Date: Wed, 9 Sep 2026 21:02:10 -0400 Message-ID: <20260910010210.3797772-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026090411-splice-widow-13ac@gregkh> References: <2026090411-splice-widow-13ac@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 6eec1e6fb139f..92d6b611c6c9e 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2022,7 +2022,8 @@ 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