linux-kernel - [PATCH 2/4] media: rkisp1: Fix IRQ handler return values

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Message-Id: <20231205-rkisp-irq-fix-v1-2-f4045c74ba45@ideasonboard.com>
Date:   Tue, 05 Dec 2023 10:09:33 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Dafna Hirschfeld <dafna@...tmail.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Paul Elder <paul.elder@...asonboard.com>
Cc:     Alexander Stein <alexander.stein@...tq-group.com>,
        kieran.bingham@...asonboard.com, umang.jain@...asonboard.com,
        aford173@...il.com, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH 2/4] media: rkisp1: Fix IRQ handler return values

The IRQ handler rkisp1_isr() calls sub-handlers, all of which returns an
irqreturn_t value, but rkisp1_isr() ignores those values and always
returns IRQ_HANDLED.

Fix this by collecting the return values, and returning IRQ_HANDLED or
IRQ_NONE as appropriate.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 76f93614b4cf..1d60f4b8bd09 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -445,17 +445,27 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
 
 static irqreturn_t rkisp1_isr(int irq, void *ctx)
 {
+	irqreturn_t ret;
+
 	/*
 	 * Call rkisp1_capture_isr() first to handle the frame that
 	 * potentially completed using the current frame_sequence number before
 	 * it is potentially incremented by rkisp1_isp_isr() in the vertical
 	 * sync.
 	 */
-	rkisp1_capture_isr(irq, ctx);
-	rkisp1_isp_isr(irq, ctx);
-	rkisp1_csi_isr(irq, ctx);
 
-	return IRQ_HANDLED;
+	ret = IRQ_NONE;
+
+	if (rkisp1_capture_isr(irq, ctx) == IRQ_HANDLED)
+		ret = IRQ_HANDLED;
+
+	if (rkisp1_isp_isr(irq, ctx) == IRQ_HANDLED)
+		ret = IRQ_HANDLED;
+
+	if (rkisp1_csi_isr(irq, ctx) == IRQ_HANDLED)
+		ret = IRQ_HANDLED;
+
+	return ret;
 }
 
 static const char * const px30_isp_clks[] = {

-- 
2.34.1