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cris: push down BKL into some device drivers

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A number of cris specific device drivers still use the
locked ->ioctl operation. Convert them to unlocked_ioctl
with explicit lock_kernel calls.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
This commit is contained in:
Arnd Bergmann 2010-04-27 16:24:21 +02:00 committed by Jesper Nilsson
parent 1d16b0f2f3
commit f35d776458
4 changed files with 60 additions and 22 deletions
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20
arch/cris/arch-v10/drivers/ds1302.c
View File

@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include <linux/bcd.h>
#include <linux/capability.h>
@ -238,9 +239,7 @@ static unsigned char days_in_mo[] =
/* ioctl that supports RTC_RD_TIME and RTC_SET_TIME (read and set time/date). */
static int
rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
static int rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
unsigned long flags;
@ -354,6 +353,17 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
}
}
static long rtc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int ret;
lock_kernel();
ret = rtc_ioctl(file, cmd, arg);
unlock_kernel();
return ret;
}
static void
print_rtc_status(void)
{
@ -375,8 +385,8 @@ print_rtc_status(void)
/* The various file operations we support. */
static const struct file_operations rtc_fops = {
.owner = THIS_MODULE,
.ioctl = rtc_ioctl,
.owner = THIS_MODULE,
.unlocked_ioctl = rtc_unlocked_ioctl,
};
/* Probe for the chip by writing something to its RAM and try reading it back. */

19
arch/cris/arch-v10/drivers/pcf8563.c
View File

@ -27,6 +27,7 @@
#include <linux/delay.h>
#include <linux/bcd.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@ -53,7 +54,7 @@ static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
static const unsigned char days_in_month[] =
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
static long pcf8563_unlocked_ioctl(struct file *, unsigned int, unsigned long);
/* Cache VL bit value read at driver init since writing the RTC_SECOND
* register clears the VL status.
@ -62,7 +63,7 @@ static int voltage_low;
static const struct file_operations pcf8563_fops = {
.owner = THIS_MODULE,
.ioctl = pcf8563_ioctl,
.unlocked_ioctl = pcf8563_unlocked_ioctl,
};
unsigned char
@ -212,8 +213,7 @@ pcf8563_exit(void)
* ioctl calls for this driver. Why return -ENOTTY upon error? Because
* POSIX says so!
*/
int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
/* Some sanity checks. */
if (_IOC_TYPE(cmd) != RTC_MAGIC)
@ -339,6 +339,17 @@ int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
return 0;
}
static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
int ret;
lock_kernel();
return pcf8563_ioctl(filp, cmd, arg);
unlock_kernel();
return ret;
}
static int __init pcf8563_register(void)
{
if (pcf8563_init() < 0) {

22
arch/cris/arch-v32/drivers/i2c.c
View File

@ -649,10 +649,10 @@ i2c_release(struct inode *inode, struct file *filp)
/* Main device API. ioctl's to write or read to/from i2c registers.
*/
static int
i2c_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static long
i2c_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int ret;
if(_IOC_TYPE(cmd) != ETRAXI2C_IOCTYPE) {
return -ENOTTY;
}
@ -665,9 +665,13 @@ i2c_ioctl(struct inode *inode, struct file *file,
I2C_ARGREG(arg),
I2C_ARGVALUE(arg)));
return i2c_writereg(I2C_ARGSLAVE(arg),
lock_kernel();
ret = i2c_writereg(I2C_ARGSLAVE(arg),
I2C_ARGREG(arg),
I2C_ARGVALUE(arg));
unlock_kernel();
return ret;
case I2C_READREG:
{
unsigned char val;
@ -675,7 +679,9 @@ i2c_ioctl(struct inode *inode, struct file *file,
D(printk("i2cr %d %d ",
I2C_ARGSLAVE(arg),
I2C_ARGREG(arg)));
lock_kernel();
val = i2c_readreg(I2C_ARGSLAVE(arg), I2C_ARGREG(arg));
unlock_kernel();
D(printk("= %d\n", val));
return val;
}
@ -688,10 +694,10 @@ i2c_ioctl(struct inode *inode, struct file *file,
}
static const struct file_operations i2c_fops = {
.owner = THIS_MODULE,
.ioctl = i2c_ioctl,
.open = i2c_open,
.release = i2c_release,
.owner = THIS_MODULE,
.unlocked_ioctl = i2c_ioctl,
.open = i2c_open,
.release = i2c_release,
};
static int __init i2c_init(void)

21
arch/cris/arch-v32/drivers/pcf8563.c
View File

@ -24,6 +24,7 @@
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/bcd.h>
#include <linux/mutex.h>
@ -49,7 +50,7 @@ static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
static const unsigned char days_in_month[] =
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
/* Cache VL bit value read at driver init since writing the RTC_SECOND
* register clears the VL status.
@ -57,8 +58,8 @@ int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
static int voltage_low;
static const struct file_operations pcf8563_fops = {
.owner = THIS_MODULE,
.ioctl = pcf8563_ioctl
.owner = THIS_MODULE,
.unlocked_ioctl = pcf8563_unlocked_ioctl,
};
unsigned char
@ -208,8 +209,7 @@ pcf8563_exit(void)
* ioctl calls for this driver. Why return -ENOTTY upon error? Because
* POSIX says so!
*/
int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
/* Some sanity checks. */
if (_IOC_TYPE(cmd) != RTC_MAGIC)
@ -335,6 +335,17 @@ int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
return 0;
}
static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
int ret;
lock_kernel();
return pcf8563_ioctl(filp, cmd, arg);
unlock_kernel();
return ret;
}
static int __init pcf8563_register(void)
{
if (pcf8563_init() < 0) {