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 BB4A635C6B2; Sat, 12 Sep 2026 09:35:50 +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=1789205751; cv=none; b=h3+N67GDxOnDKRvw+71if0XkwdW1XuOLykm24S8LwiL5Sn+cLUBsT+D25+Y3O03+rOJqDHIWpiiQwK3RoRwlixkm+1rrN0uWqyBvZi6zUFO0EXNsDJtwy9ocHj2KWvfJTXuJ03VOM1Hv9MiRUvPz5ddKwqnqH3Oui+hlvx0PQc8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789205751; c=relaxed/simple; bh=FT3ln71cCrlvWCvX2BsY1BuAR9cRU+xDqvVjYHmjcsY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=DlW/olQ9mLGirfF3ZQcMUFZBfLQDqprI6d1bWOqYy2oZXzbPND+oJc7jfGNLV+QveqMjD2J1e8+K7coYtuCNrAV4bMX+u6B1mw41Yt/njiUXu2UVOky23aYEds06yQY79aVNMxZ9C0lQD3/jwDHgWyXku13G1oxqgbXa+epWPA0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uLbsTCT8; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uLbsTCT8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ABD131F000FF; Sat, 12 Sep 2026 09:35:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789205750; bh=ZYxNfkSaprFr0vtVWaoXq6ew2JF3QEzNUTOI4vz3agE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=uLbsTCT8NwfhiG86bIpG1bt4ODebCwUrPCpaZoHMfAPZAowHEGWC8AzCj3trOJbQ2 gNt5IGtGI3OIVJ8t6GuZkhr1tdgcsSX7h5HXeiFc3ReWCcwjpO9f+D+oEOSBLeDONe OKChOcBdQJMO58R+p6eyFzeUWNC0LTaMtJLozQiU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Adrian Hunter , Frank Li , Mukesh Savaliya , Alexandre Belloni , Sasha Levin Subject: [PATCH 6.18 0065/1518] i3c: master: Do not treat master device as a duplicate target Date: Sat, 12 Sep 2026 08:37:14 +0200 Message-ID: <20260912065624.925036336@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- drivers/i3c/master.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2295,7 +2295,8 @@ i3c_master_search_i3c_dev_duplicate(stru 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; }