linux-kernel - [PATCH] tosh: Use non bkl ioctl

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Message-ID: <20100104161918.16766.43340.stgit@localhost.localdomain>
Date:	Mon, 04 Jan 2010 16:19:55 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] tosh: Use non bkl ioctl

Another one thats been sent several times over the past months but ignored so
can go directly


We wrap the smm calls and other bits with the BKL push down as a precaution
but they can probably go

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/char/toshiba.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)


diff --git a/drivers/char/toshiba.c b/drivers/char/toshiba.c
index 663cd15..f8bc79f 100644
--- a/drivers/char/toshiba.c
+++ b/drivers/char/toshiba.c
@@ -68,7 +68,7 @@
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-
+#include <linux/smp_lock.h>
 #include <linux/toshiba.h>
 
 #define TOSH_MINOR_DEV 181
@@ -88,13 +88,13 @@ static int tosh_date;
 static int tosh_sci;
 static int tosh_fan;
 
-static int tosh_ioctl(struct inode *, struct file *, unsigned int,
+static long tosh_ioctl(struct file *, unsigned int,
 	unsigned long);
 
 
 static const struct file_operations tosh_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl		= tosh_ioctl,
+	.unlocked_ioctl	= tosh_ioctl,
 };
 
 static struct miscdevice tosh_device = {
@@ -252,8 +252,7 @@ int tosh_smm(SMMRegisters *regs)
 EXPORT_SYMBOL(tosh_smm);
 
 
-static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
-	unsigned long arg)
+static long tosh_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 {
 	SMMRegisters regs;
 	SMMRegisters __user *argp = (SMMRegisters __user *)arg;
@@ -275,13 +274,16 @@ static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 				return -EINVAL;
 
 			/* do we need to emulate the fan ? */
+			lock_kernel();
 			if (tosh_fan==1) {
 				if (((ax==0xf300) || (ax==0xf400)) && (bx==0x0004)) {
 					err = tosh_emulate_fan(&regs);
+					unlock_kernel();
 					break;
 				}
 			}
 			err = tosh_smm(&regs);
+			unlock_kernel();
 			break;
 		default:
 			return -EINVAL;

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