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 767382C0296 for ; Thu, 10 Sep 2026 01:00:17 +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=1789002018; cv=none; b=Cw86BhtPwWwRstPDbAZlXi1hhDgQk5nEHklRDbtmgtIZgow9rY8hKOxWM999xwzH/CzZ0gCMT2J1F2fLQ43GknuI3j0kQn4aGUf2Atj6ieSGG9TKnpzjep7NktG2CzEbqHQahLJUnv5zmdtVGtHeTmvafrz8qOuTGuQe8qRFWiI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789002018; c=relaxed/simple; bh=c38Tr1joAMyE+TOFjOfpyzNVQy1RZaX3gsQvokxm1zg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FFeNMq1DDjLp9E4etNaKlicck/8/PgyVTg7AXyPQ4ioJwm5qLTzpnBH1oinDhY2sBcE5LQwS5KZFiBQDzpz2NT27ckKBgzPrb3GJzAkR8XLvHNqr7vReQAvnWAiCcz3tV8U3VnPYU8TAq44mB+0RAhBZHyxB5JKtyst+OrRhNR0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JTICBGKf; 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="JTICBGKf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B42C51F00893; Thu, 10 Sep 2026 01:00:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789002017; bh=XHY6dbXfFyd6Cu2ya113tRprtFxdqWJ6EP0VJ1tm31s=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=JTICBGKfLCEIC2D9dhRCApctLWr33XbKcUxOPk94b1SP9ECWf7GQHY474hQravNLn 0OJaokzuUdvZm2x0fGE6QW+Wtku46nvyWmBE6NCF7PzVBe9xO4MV0iaduQPb78khUP MqRZtGSPFWuelp8AyJ0HKR0W7dwK3joCa7oxk7jWu6/oc9CSll+oJ3BOcRWJBg7Hi1 sZ+Yj38vLnaFK+rLP4JmrE651gQDaOy/ceask9wtWWHAE2KU2A/is8aEmxEaKMnONI LCbutfWaKLjX8voDxOJQgM2xxIYLPWOXpBnyhXVTw+U/8qx+z+yVGYW54V1MUGTvf+ FcKOY2DHaRkOg== From: Sasha Levin To: stable@vger.kernel.org Cc: Adrian Hunter , Frank Li , Mukesh Savaliya , Alexandre Belloni , Sasha Levin Subject: [PATCH 6.18.y] i3c: master: Do not treat master device as a duplicate target Date: Wed, 9 Sep 2026 21:00:14 -0400 Message-ID: <20260910010014.3788076-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026090410-unnoticed-twerp-c8c4@gregkh> References: <2026090410-unnoticed-twerp-c8c4@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 41452a27262d6..1867a9206dc47 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2272,7 +2272,8 @@ 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