linux-kernel - [PATCH AUTOSEL 5.15 028/153] i3c: master: svc: Fix missing STOP for master request

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Message-Id: <20250505231320.2695319-28-sashal@kernel.org>
Date: Mon,  5 May 2025 19:11:15 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Stanley Chu <yschu@...oton.com>,
	Frank Li <Frank.Li@....com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Sasha Levin <sashal@...nel.org>,
	miquel.raynal@...tlin.com,
	linux-i3c@...ts.infradead.org,
	imx@...ts.linux.dev
Subject: [PATCH AUTOSEL 5.15 028/153] i3c: master: svc: Fix missing STOP for master request

From: Stanley Chu <yschu@...oton.com>

[ Upstream commit 0430bf9bc1ac068c8b8c540eb93e5751872efc51 ]

The controller driver nacked the master request but didn't emit a
STOP to end the transaction. The driver shall refuse the unsupported
requests and return the controller state to IDLE by emitting a STOP.

Signed-off-by: Stanley Chu <yschu@...oton.com>
Reviewed-by: Frank Li <Frank.Li@....com>
Link: https://lore.kernel.org/r/20250318053606.3087121-4-yschu@nuvoton.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i3c/master/svc-i3c-master.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 368429a34d600..92488ba5b5f2a 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -437,6 +437,7 @@ static void svc_i3c_master_ibi_work(struct work_struct *work)
 		queue_work(master->base.wq, &master->hj_work);
 		break;
 	case SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST:
+		svc_i3c_master_emit_stop(master);
 	default:
 		break;
 	}
-- 
2.39.5