linux-kernel - [PATCH v2] edac: mpc85xx: Use platform_register/unregister

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Message-Id: <1449136632-11680-1-git-send-email-thierry.reding@gmail.com>
Date:	Thu,  3 Dec 2015 10:57:12 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Johannes Thumshirn <morbidrsa@...il.com>,
	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <bp@...en8.de>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] edac: mpc85xx: Use platform_register/unregister_drivers()

From: Thierry Reding <treding@...dia.com>

These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>
Signed-off-by: Thierry Reding <treding@...dia.com>
---
Changes in v2:
- fixup commit subject and add Reviewed-by (Johannes Thumshirn)

Note sure this was clear from the submission, but the patches that add the
platform_register/unregister_drivers() functions were merged in v4.4-rc1,
so maintainers are free to apply these patches to their trees.

 drivers/edac/mpc85xx_edac.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/edac/mpc85xx_edac.c b/drivers/edac/mpc85xx_edac.c
index 23ef8e9f2c9a..3eab06351089 100644
--- a/drivers/edac/mpc85xx_edac.c
+++ b/drivers/edac/mpc85xx_edac.c
@@ -1208,6 +1208,11 @@ static void __init mpc85xx_mc_clear_rfxe(void *data)
 }
 #endif
 
+static struct platform_driver * const drivers[] = {
+	&mpc85xx_mc_err_driver,
+	&mpc85xx_l2_err_driver,
+};
+
 static int __init mpc85xx_mc_init(void)
 {
 	int res = 0;
@@ -1226,13 +1231,9 @@ static int __init mpc85xx_mc_init(void)
 		break;
 	}
 
-	res = platform_driver_register(&mpc85xx_mc_err_driver);
-	if (res)
-		printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
-
-	res = platform_driver_register(&mpc85xx_l2_err_driver);
+	res = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 	if (res)
-		printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
+		printk(KERN_WARNING EDAC_MOD_STR "drivers fail to register\n");
 
 #ifdef CONFIG_FSL_SOC_BOOKE
 	pvr = mfspr(SPRN_PVR);
@@ -1270,8 +1271,7 @@ static void __exit mpc85xx_mc_exit(void)
 		on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
 	}
 #endif
-	platform_driver_unregister(&mpc85xx_l2_err_driver);
-	platform_driver_unregister(&mpc85xx_mc_err_driver);
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 }
 
 module_exit(mpc85xx_mc_exit);
-- 
2.5.0

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