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 3C6891FC101; Mon, 23 Mar 2026 14:23:03 +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=1774275784; cv=none; b=CPwyMpWSWHiQ0dDCk/iXzv7dT+Hxt1DwU0398/69dR4DTvbatBO3zNYU+uGkvY+28jVC46mKYJAHmq/GqUbdyC17IY56XKXUvBIpuLLAjBjtQhu02jOhEoEqZM+Orr77XGWjU1IclttqHDK7DoNcONku7NdJJVSH74+npErPoa4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774275784; c=relaxed/simple; bh=E1tSXkIEcFABxAnFXbXbq7+mxNww3mv8NdZXuOpRgD8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dg8v/JCwOjfE8eCovmUDaKio3XG1AW9mp1sAW4XmK4Yvd+NRIOsf3SYBpa3ZtoaccQF214yxRci6vHCZIkA2L1S9aj4Je/+lmfFm8edF7rk9sZDNOPWXySml6iQo175ej+dfNIZ7LZ8qDJtjiO50nBsSCwGM+o4e1/RSIfGzPgg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QyMjwIsP; 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="QyMjwIsP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67A74C4CEF7; Mon, 23 Mar 2026 14:23:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774275783; bh=E1tSXkIEcFABxAnFXbXbq7+mxNww3mv8NdZXuOpRgD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QyMjwIsPEAcHys3WKyK2AsHl1P5UpyhJ6kqYTgO8Fd2meI2peeBvNssVYx5UujdR8 WYj54fSksFqeJLeGgW1UV0DffY8yGRNI1jZ60BRlN79DMS1QTIY7i3kWqAoNV8kpM5 PHKUyRqxKy1ZJlwOKVq+jGzrMY+/jjboKglgIg1o= 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 6.12 216/460] i3c: mipi-i3c-hci: Restart DMA ring correctly after dequeue abort Date: Mon, 23 Mar 2026 14:43:32 +0100 Message-ID: <20260323134531.814559243@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134526.647552166@linuxfoundation.org> References: <20260323134526.647552166@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 6.12-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 @@ -500,7 +500,9 @@ 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; }