linux-kernel - [PATCH 5/6] usb/gadget: Do not take BKL for gadget->ops->ioctl

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Message-Id: <1275426285-9088-6-git-send-email-arnd@arndb.de>
Date:	Tue,  1 Jun 2010 23:04:44 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Greg KH <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	linux-usb@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	John Kacur <jkacur@...hat.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: [PATCH 5/6] usb/gadget: Do not take BKL for gadget->ops->ioctl

There is no gadget driver in the tree that
actually implements the ioctl operation, so
obviously it is not necessary to hold the
BKL around the call.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/usb/gadget/f_fs.c  |    2 --
 drivers/usb/gadget/inode.c |    6 ++----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index d69eccf..715da23 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -714,9 +714,7 @@ static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
 		struct ffs_function *func = ffs->func;
 		ret = func ? ffs_func_revmap_intf(func, value) : -ENODEV;
 	} else if (gadget->ops->ioctl) {
-		lock_kernel();
 		ret = gadget->ops->ioctl(gadget, code, value);
-		unlock_kernel();
 	} else {
 		ret = -ENOTTY;
 	}
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index de8a838..5308392 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1299,11 +1299,9 @@ static long dev_ioctl (struct file *fd, unsigned code, unsigned long value)
 	struct usb_gadget	*gadget = dev->gadget;
 	long ret = -ENOTTY;
 
-	if (gadget->ops->ioctl) {
-		lock_kernel();
+	if (gadget->ops->ioctl)
 		ret = gadget->ops->ioctl (gadget, code, value);
-		unlock_kernel();
-	}
+
 	return ret;
 }
 
-- 
1.7.0.4

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