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 9C55A30E696; Mon, 5 May 2025 22:29:10 +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=1746484150; cv=none; b=beGr+tfFXnRCybDGDAigM/rzqrDBL06+y3c1HbC8BVHv60WalCJc/E2jHrRJJgTNJ3D/svtglT15xznh1djX3Y2lJHCsnr68v+7YG5UunPb8pKj//ahniEv2GIaf+omCx9mxpJ7RwOT/hnos88uN84UzENgDMrQN3PRm2StZmso= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746484150; c=relaxed/simple; bh=Qc6sRplHBpINBzNC6KWWgZA7v4kgorJW99xRFGHuJ8M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=KsQ4jCCZOndlw4Vnpw67tM+tzuGprg6kql+4Hm8TZkYukL5jdb//J3j0E+sP5vJjCIZ1BnxLOVcenEeceI879Ke/S4tRq3eKbvrPEkWJZ0e1iDo6sELQ8l5pP3rcFAeaBLySKLdQoY1+efTwJiZmdjUIDZTIjhf36l05UqzL4RA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JGCSdMrf; 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="JGCSdMrf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83508C4CEEF; Mon, 5 May 2025 22:29:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746484150; bh=Qc6sRplHBpINBzNC6KWWgZA7v4kgorJW99xRFGHuJ8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JGCSdMrfWcm2KZOf1gNj6FXjfigvCfmR38jiCEKvrlm79hrrLnJCmX5ctbV12nLCd AF16ZgTxVGDER6XGHM+uHk0J3NmaFEqnsfuqyF720wDGujqyVwcJz+SikPyIBkZEfm EpC+BLAYx8Rh9fr1N26QILyTUJ3aRkcW7+SE3WK6nJUPnmRwiMGSZ4PCGWUxkzvaKJ KmrIJwTIP8N/FM2RC4GkSzCc+xxipmQOVcTrqthgZyX5v32l94+A0MFaZat3L6pKAF aPjcGe4zkS/kiuWeTaXqTQ1nbrn26madsBSVpgpivFswLfdv9mTQuSdsJYlJLMhoEe qhZvuQ+1/Rw6w== 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 6.14 376/642] i3c: master: svc: Flush FIFO before sending Dynamic Address Assignment(DAA) Date: Mon, 5 May 2025 18:09:52 -0400 Message-Id: <20250505221419.2672473-376-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505221419.2672473-1-sashal@kernel.org> References: <20250505221419.2672473-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.14.5 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 a18fe62962b0c..2cf2c567f8931 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -899,6 +899,8 @@ 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) { /* clean SVC_I3C_MINT_IBIWON w1c bits */ writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS); -- 2.39.5