linux-kernel - [PATCH 1/4] platform: Use drv->driver.bus instead of assuming platform_bus

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Message-Id: <1282158943-11902-2-git-send-email-ppannuto@codeaurora.org>
Date:	Wed, 18 Aug 2010 12:15:40 -0700
From:	Patrick Pannuto <ppannuto@...eaurora.org>
To:	linux-kernel@...r.kernel.org
Cc:	ppannuto@...eaurora.org, linux-arm-msm@...r.kernel.org,
	magnus.damm@...il.com, grant.likely@...retlab.ca, gregkh@...e.de,
	Paul Mundt <lethal@...ux-sh.org>,
	Magnus Damm <damm@...nsource.se>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: [PATCH 1/4] platform: Use drv->driver.bus instead of assuming platform_bus_type

In theory (although not *yet* in practice), a driver being passed
to platform_driver_probe might have driver.bus set to something
other than platform_bus_type. Locking drv->driver.bus is always
correct.

Change-Id: Ib015c35237eb5493d17a812576a3a9906e1344d4
Signed-off-by: Patrick Pannuto <ppannuto@...eaurora.org>
---
 drivers/base/platform.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4d99c8b..b69ccb4 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -539,12 +539,12 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
 	 * if the probe was successful, and make sure any forced probes of
 	 * new devices fail.
 	 */
-	spin_lock(&platform_bus_type.p->klist_drivers.k_lock);
+	spin_lock(&drv->driver.bus->p->klist_drivers.k_lock);
 	drv->probe = NULL;
 	if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list))
 		retval = -ENODEV;
 	drv->driver.probe = platform_drv_probe_fail;
-	spin_unlock(&platform_bus_type.p->klist_drivers.k_lock);
+	spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock);
 
 	if (code != retval)
 		platform_driver_unregister(drv);
-- 
1.7.2.1

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