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 398F62773C3; Mon, 23 Mar 2026 15:10:19 +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=1774278619; cv=none; b=PGIG+J9Iy3oqKGvARcTuKaYwqXMLSVnfFcpQtneJ/omB6qRR+TcYTLfM1r5EekfULBpXk9Owem0TPhPkGL9NB/MDIWRsFs0YdoQJ4UixSv8a2HaK6TLB2dhNW74a7V7uWOxYPKLcAT58c3Bv/IaCQC6MnYQqxw9b02yFRAV98pU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774278619; c=relaxed/simple; bh=yFRsDeE44w5xi+s3sl+7wrpf0JV6QieOJ8tEf1+flwE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pyu27bqsolzL8wxXic1+2G39s95WuqHSnHxk9y0/aBP/cx7hC+XGesbtcn8TLq+pwC5xorf9XkoDBOb7okKezqIOh8dce98GJIDkeOIfXPbk2ccDokgTEsyukPgUgFHSJuOL7XYoRR8sliHoTx5hoDPKPCi8+HFYij79L2EN1Gg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=i4OEd/Js; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="i4OEd/Js" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97EACC4CEF7; Mon, 23 Mar 2026 15:10:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774278619; bh=yFRsDeE44w5xi+s3sl+7wrpf0JV6QieOJ8tEf1+flwE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i4OEd/JsLLZKrj+MJygjBs5KLOp9B8PPa0ueXMBHY8KjKGmX3uvCe5q+w1GG6IXqx RtCar4zF8YTx9ct6EF0g7I0HytvDQEQmK02TqSL/8IpHiJm6/QcHzNWW60TDkKuonx pc8lQEaWNGAO5AXCsk8oTh7KY1Y6B3RZ82tJGqfI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Adrian Hunter , Frank Li , Alexandre Belloni Subject: [PATCH 6.6 363/567] i3c: mipi-i3c-hci: Restart DMA ring correctly after dequeue abort Date: Mon, 23 Mar 2026 14:44:43 +0100 Message-ID: <20260323134542.805055152@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134533.749096647@linuxfoundation.org> References: <20260323134533.749096647@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Adrian Hunter commit b6d586431ae20d5157ee468d0ef62ad26798ef13 upstream. The DMA dequeue path attempts to restart the ring after aborting an in-flight transfer, but the current sequence is incomplete. The controller must be brought out of the aborted state and the ring control registers must be programmed in the correct order: first clearing ABORT, then re-enabling the ring and asserting RUN_STOP to resume operation. Add the missing controller resume step and update the ring control writes so that the ring is restarted using the proper sequence. Fixes: 9ad9a52cce282 ("i3c/master: introduce the mipi-i3c-hci driver") Cc: stable@vger.kernel.org Signed-off-by: Adrian Hunter Reviewed-by: Frank Li Link: https://patch.msgid.link/20260306072451.11131-11-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni Signed-off-by: Greg Kroah-Hartman --- drivers/i3c/master/mipi-i3c-hci/dma.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/i3c/master/mipi-i3c-hci/dma.c +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c @@ -491,7 +491,9 @@ static bool hci_dma_dequeue_xfer(struct } /* restart the ring */ + mipi_i3c_hci_resume(hci); rh_reg_write(RING_CONTROL, RING_CTRL_ENABLE); + rh_reg_write(RING_CONTROL, RING_CTRL_ENABLE | RING_CTRL_RUN_STOP); return did_unqueue; }