linux-kernel - [PATCH v2 1/2] msm: msm_fb: Add remove function for platform driver for clean unloading

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Date:	Tue, 26 Aug 2014 17:40:37 +0530
From:	Pramod Gurav <pramod.gurav@...rtplayin.com>
To:	linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org
Cc:	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Rob Clark <robdclark@...il.com>
Subject: [PATCH v2 1/2] msm: msm_fb: Add remove function for platform driver for clean unloading

This adds a  remove function to platform driver structure so that
resources are released when driver is unloaded.

Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>

CC: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
CC: Tomi Valkeinen <tomi.valkeinen@...com>
CC: Stephen Boyd <sboyd@...eaurora.org>
CC: Jingoo Han <jg1.han@...sung.com>
CC: Rob Clark <robdclark@...il.com>

---
 drivers/video/fbdev/msm/msm_fb.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/video/fbdev/msm/msm_fb.c b/drivers/video/fbdev/msm/msm_fb.c
index 1374803..4640188 100644
--- a/drivers/video/fbdev/msm/msm_fb.c
+++ b/drivers/video/fbdev/msm/msm_fb.c
@@ -589,6 +589,8 @@ static int msmfb_probe(struct platform_device *pdev)
 
 	msmfb->sleeping = WAKING;
 
+	platform_set_drvdata(pdev, msmfb);
+
 	return 0;
 
 error_register_framebuffer:
@@ -598,9 +600,23 @@ error_setup_fbmem:
 	return ret;
 }
 
+static int msmfb_remove(struct platform_device *pdev)
+{
+	struct msmfb_info *msmfb;
+
+	msmfb = platform_get_drvdata(pdev);
+
+	unregister_framebuffer(msmfb->fb);
+	iounmap(msmfb->fb->screen_base);
+	framebuffer_release(msmfb->fb);
+
+	return 0;
+}
+
 static struct platform_driver msm_panel_driver = {
 	/* need to write remove */
 	.probe = msmfb_probe,
+	.remove = msmfb_remove,
 	.driver = {.name = "msm_panel"},
 };
 
-- 
1.7.9.5

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