From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 943F22C1785; Mon, 5 May 2025 22:49:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485372; cv=none; b=R0Qd2Em+qvGnFgdQJ3X1A029NIqHULGGEGTLBOX7L0Y/Fz1a8e4T57j1FCbeU1qfKQNvMlpWPafmgxOXih40CFw1jfnHX72L61bykf8Jb0dGjN2t3RhbdVTx+eGU1BMsWM55c/TP8ZJDAmrYUlE0SvVe6VGCeIiRbuGDTTUlEqI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485372; c=relaxed/simple; bh=YVBEWd8fzTq67NZgBhRcJJ1n5ZNEhk8+BBu3Q9IDrXI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=psNSVhbsXzhfGP1ziDRFYZPWq6Tt3SluXVvxSldFbGMTTDuKwZUVjLUixMFDdrtxIhIXFKXIE+GE4KIv4CDlVg6CZLq6i7aetiMWqmMk0FWTRPaOdMSHFxfml1vHuFGtXZHYbmnvf4oeG48+B620KXBpmhIZDU46q5ki/9kyNBw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JmvhBqS2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JmvhBqS2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90DD3C4CEEF; Mon, 5 May 2025 22:49:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746485371; bh=YVBEWd8fzTq67NZgBhRcJJ1n5ZNEhk8+BBu3Q9IDrXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JmvhBqS2jPEH/9Ohwr9cbz+MQe9xVtExFodBDZ2p8Bc33w4PLzsKxQuf+TKatL9C+ gflKvI4U+2sZ+DNFtLeb1Ai5dSUPVkw2f0IxB7XUc0HqGi/ZGJPb0mfaKFPm+4O1lM SVa6Hd0d1mYbAJVqsG4ECHBiuPzpbvtHysixi/37iCuHHI3o3lpXzqOnqHxNZIMsB+ DXbBb4CU2e8viVmzNLvGUpXeKe3G6ngF3TUnF8gUN57R5GWQCY5q59J5kIMpSXH/Pg ObuMrTxEUyKRNFu/noZOHVbGpBXYrI3BNXB14BBb8LfmXkdf13LN1v2dYm9ogbhvIb dGPy7um37aRyg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Frank Li , Miquel Raynal , Alexandre Belloni , Sasha Levin , linux-i3c@lists.infradead.org, imx@lists.linux.dev Subject: [PATCH AUTOSEL 6.12 295/486] i3c: master: svc: Flush FIFO before sending Dynamic Address Assignment(DAA) Date: Mon, 5 May 2025 18:36:11 -0400 Message-Id: <20250505223922.2682012-295-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505223922.2682012-1-sashal@kernel.org> References: <20250505223922.2682012-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.26 Content-Transfer-Encoding: 8bit From: Frank Li [ Upstream commit a892ee4cf22a50e1d6988d0464a9a421f3e5db2f ] Ensure the FIFO is empty before issuing the DAA command to prevent incorrect command data from being sent. Align with other data transfers, such as svc_i3c_master_start_xfer_locked(), which flushes the FIFO before sending a command. Signed-off-by: Frank Li Reviewed-by: Miquel Raynal Link: https://lore.kernel.org/r/20250129162250.3629189-1-Frank.Li@nxp.com Signed-off-by: Alexandre Belloni Signed-off-by: Sasha Levin --- drivers/i3c/master/svc-i3c-master.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 6ffe022dbb5b4..62913feae45dd 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -860,6 +860,8 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master, u32 reg; int ret, i; + svc_i3c_master_flush_fifo(master); + while (true) { /* SVC_I3C_MCTRL_REQUEST_PROC_DAA have two mode, ENTER DAA or PROCESS DAA. * -- 2.39.5