linux-kernel - [PATCH] media: rzg2l-cru: Replace usleep

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Message-ID: <8d9896e0482a1e04ae8934a1bdaaa7de73f919f1.1764691610.git.tommaso.merciai.xr@bp.renesas.com>
Date: Tue,  2 Dec 2025 17:08:41 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Hans Verkuil <hverkuil+cisco@...nel.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Daniel Scally <dan.scally+renesas@...asonboard.com>,
	Jacopo Mondi <jacopo.mondi@...asonboard.com>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Khai Nguyen <khai.nguyen.wx@...esas.com>,
	Hao Bui <hao.bui.yg@...esas.com>
Subject: [PATCH] media: rzg2l-cru: Replace usleep_range with udelay

`usleep_range()` should not be used in atomic contexts like between
spin_lock_irqsave()/spin_lock_irqrestore() pair inside function
rzg2l_cru_stop_image_processing(). That may cause scheduling while
atomic bug.

Signed-off-by: Khai Nguyen <khai.nguyen.wx@...esas.com>
Signed-off-by: Hao Bui <hao.bui.yg@...esas.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
index 162e2ace6931..1355bfd186d4 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
@@ -369,7 +369,7 @@ void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru)
 		if (cru->info->fifo_empty(cru))
 			break;
 
-		usleep_range(10, 20);
+		udelay(10);
 	}
 
 	/* Notify that FIFO is not empty here */
@@ -385,7 +385,7 @@ void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru)
 			AMnAXISTPACK_AXI_STOP_ACK)
 			break;
 
-		usleep_range(10, 20);
+		udelay(10);
 	}
 
 	/* Notify that AXI bus can not stop here */
-- 
2.43.0