linux-kernel - [PATCH] make mmci-omap using platform_driver

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Message-Id: <1238694461-29501-1-git-send-email-u.kleine-koenig@pengutronix.de>
Date:	Thu,  2 Apr 2009 19:47:41 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	Grazvydas Ignotas <notasas@...il.com>,
	Pierre Ossman <drzeus-mmc@...eus.cx>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Paul Walmsley <paul@...an.com>,
	Jarkko Lavinen <jarkko.lavinen@...ia.com>,
	Hiroshi DOYU <Hiroshi.DOYU@...ia.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Carlos Eduardo Aguiar <carlos.aguiar@...t.org.br>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] make mmci-omap using platform_driver_probe

A pointer to mmc_omap_probe which lives in .init.text is passed to the
core via platform_driver_register and so the kernel might oops if probe
is called after the init code is discarded.

As requested by David Brownell platform_driver_probe is used instead of
moving the probe function to .devinit.text.  This saves some memory, but
might have the downside that a device being registered after the call to
mmc_omap_init but before the init sections are discarded will not be
bound anymore to the driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: Grazvydas Ignotas <notasas@...il.com>
Cc: Pierre Ossman <drzeus-mmc@...eus.cx>
Cc: David Brownell <dbrownell@...rs.sourceforge.net>
Cc: Tony Lindgren <tony@...mide.com>
Cc: Russell King <rmk+kernel@....linux.org.uk>
Cc: Paul Walmsley <paul@...an.com>
Cc: Jarkko Lavinen <jarkko.lavinen@...ia.com>
Cc: Hiroshi DOYU <Hiroshi.DOYU@...ia.com>
Cc: Kyungmin Park <kyungmin.park@...sung.com>
Cc: Carlos Eduardo Aguiar <carlos.aguiar@...t.org.br>
Cc: Andrew Morton <akpm@...ux-foundation.org>

---
 drivers/mmc/host/omap.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 67d7b7f..004080e 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -1601,7 +1601,6 @@ static int mmc_omap_resume(struct platform_device *pdev)
 #endif
 
 static struct platform_driver mmc_omap_driver = {
-	.probe		= mmc_omap_probe,
 	.remove		= mmc_omap_remove,
 	.suspend	= mmc_omap_suspend,
 	.resume		= mmc_omap_resume,
@@ -1613,7 +1612,7 @@ static struct platform_driver mmc_omap_driver = {
 
 static int __init mmc_omap_init(void)
 {
-	return platform_driver_register(&mmc_omap_driver);
+	return platform_driver_probe(&mmc_omap_driver, mmc_omap_probe);
 }
 
 static void __exit mmc_omap_exit(void)
-- 
tg: (5d80f8e..) t/platsection/mmc_omap_driver (depends on: linus/master)
--
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