linux-kernel - [PATCH v2 1/4] dmaengine: stm32-dma3: use module_platform

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Message-ID: <20251121-dma3_improv-v2-1-76a207b13ea6@foss.st.com>
Date: Fri, 21 Nov 2025 14:36:56 +0100
From: Amelie Delaunay <amelie.delaunay@...s.st.com>
To: Vinod Koul <vkoul@...nel.org>,
        Maxime Coquelin
	<mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
CC: <dmaengine@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Amelie Delaunay <amelie.delaunay@...s.st.com>,
        Eugen Hristev
	<eugen.hristev@...aro.org>
Subject: [PATCH v2 1/4] dmaengine: stm32-dma3: use module_platform_driver

Without module_platform_driver(), stm32-dma3 doesn't have a
module_exit procedure. Once stm32-dma3 module is inserted, it
can't be removed, marked busy.
Use module_platform_driver() instead of subsys_initcall() to register
(insmod) and unregister (rmmod) stm32-dma3 driver.

Reviewed-by: Eugen Hristev <eugen.hristev@...aro.org>
Signed-off-by: Amelie Delaunay <amelie.delaunay@...s.st.com>
---
 drivers/dma/stm32/stm32-dma3.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/dma/stm32/stm32-dma3.c b/drivers/dma/stm32/stm32-dma3.c
index 50e7106c5cb7..9500164c8f68 100644
--- a/drivers/dma/stm32/stm32-dma3.c
+++ b/drivers/dma/stm32/stm32-dma3.c
@@ -1914,12 +1914,7 @@ static struct platform_driver stm32_dma3_driver = {
 	},
 };
 
-static int __init stm32_dma3_init(void)
-{
-	return platform_driver_register(&stm32_dma3_driver);
-}
-
-subsys_initcall(stm32_dma3_init);
+module_platform_driver(stm32_dma3_driver);
 
 MODULE_DESCRIPTION("STM32 DMA3 controller driver");
 MODULE_AUTHOR("Amelie Delaunay <amelie.delaunay@...s.st.com>");

-- 
2.43.0