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scsi: autoconvert trivial BKL users to private mutex 

All these files use the big kernel lock in a trivial
way to serialize their private file operations,
typically resulting from an earlier semi-automatic
pushdown from VFS.

None of these drivers appears to want to lock against
other code, and they all use the BKL as the top-level
lock in their file operations, meaning that there
is no lock-order inversion problem.

Consequently, we can remove the BKL completely,
replacing it with a per-file mutex in every case.
Using a scripted approach means we can avoid
typos.

file=$1
name=$2
if grep -q lock_kernel ${file} ; then
    if grep -q 'include.*linux.mutex.h' ${file} ; then
            sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
    else
            sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
    fi
    sed -i ${file} \
        -e "/^#include.*linux.mutex.h/,$ {
                1,/^\(static\|int\|long\)/ {
                     /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);

} }"  \
    -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
    -e '/[      ]*cycle_kernel_lock();/d'
else
    sed -i -e '/include.*\<smp_lock.h\>/d' ${file}  \
                -e '/cycle_kernel_lock()/d'
fi

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-scsi@vger.kernel.org
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
This commit is contained in:
Arnd Bergmann 2010-06-02 14:28:52 +02:00
parent 49553c2ef8
commit c45d15d24e
16 changed files with 86 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/message/fusion/mptctl.c
View File

@ -54,7 +54,7 @@
#include <linux/pci.h>
#include <linux/delay.h> /* for mdelay */
#include <linux/miscdevice.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/compat.h>
#include <asm/io.h>
@ -83,6 +83,7 @@ MODULE_VERSION(my_VERSION);
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
static DEFINE_MUTEX(mpctl_mutex);
static u8 mptctl_id = MPT_MAX_PROTOCOL_DRIVERS;
static u8 mptctl_taskmgmt_id = MPT_MAX_PROTOCOL_DRIVERS;
@ -601,12 +602,12 @@ mptctl_fasync(int fd, struct file *filep, int mode)
MPT_ADAPTER *ioc;
int ret;
lock_kernel();
mutex_lock(&mpctl_mutex);
list_for_each_entry(ioc, &ioc_list, list)
ioc->aen_event_read_flag=0;
ret = fasync_helper(fd, filep, mode, &async_queue);
unlock_kernel();
mutex_unlock(&mpctl_mutex);
return ret;
}
@ -698,9 +699,9 @@ static long
mptctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&mpctl_mutex);
ret = __mptctl_ioctl(file, cmd, arg);
unlock_kernel();
mutex_unlock(&mpctl_mutex);
return ret;
}
@ -2926,7 +2927,7 @@ compat_mpt_command(struct file *filp, unsigned int cmd,
static long compat_mpctl_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&mpctl_mutex);
switch (cmd) {
case MPTIOCINFO:
case MPTIOCINFO1:
@ -2951,7 +2952,7 @@ static long compat_mpctl_ioctl(struct file *f, unsigned int cmd, unsigned long a
ret = -ENOIOCTLCMD;
break;
}
unlock_kernel();
mutex_unlock(&mpctl_mutex);
return ret;
}

23
drivers/message/i2o/i2o_config.c
View File

@ -31,7 +31,7 @@
*/
#include <linux/miscdevice.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/compat.h>
#include <linux/slab.h>
@ -41,6 +41,7 @@
#define SG_TABLESIZE 30
static DEFINE_MUTEX(i2o_cfg_mutex);
static long i2o_cfg_ioctl(struct file *, unsigned int, unsigned long);
static spinlock_t i2o_config_lock;
@ -741,7 +742,7 @@ static long i2o_cfg_compat_ioctl(struct file *file, unsigned cmd,
unsigned long arg)
{
int ret;
lock_kernel();
mutex_lock(&i2o_cfg_mutex);
switch (cmd) {
case I2OGETIOPS:
ret = i2o_cfg_ioctl(file, cmd, arg);
@ -753,7 +754,7 @@ static long i2o_cfg_compat_ioctl(struct file *file, unsigned cmd,
ret = -ENOIOCTLCMD;
break;
}
unlock_kernel();
mutex_unlock(&i2o_cfg_mutex);
return ret;
}
@ -981,7 +982,7 @@ static long i2o_cfg_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
{
int ret;
lock_kernel();
mutex_lock(&i2o_cfg_mutex);
switch (cmd) {
case I2OGETIOPS:
ret = i2o_cfg_getiops(arg);
@ -1037,7 +1038,7 @@ static long i2o_cfg_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
osm_debug("unknown ioctl called!\n");
ret = -EINVAL;
}
unlock_kernel();
mutex_unlock(&i2o_cfg_mutex);
return ret;
}
@ -1051,7 +1052,7 @@ static int cfg_open(struct inode *inode, struct file *file)
if (!tmp)
return -ENOMEM;
lock_kernel();
mutex_lock(&i2o_cfg_mutex);
file->private_data = (void *)(i2o_cfg_info_id++);
tmp->fp = file;
tmp->fasync = NULL;
@ -1065,7 +1066,7 @@ static int cfg_open(struct inode *inode, struct file *file)
spin_lock_irqsave(&i2o_config_lock, flags);
open_files = tmp;
spin_unlock_irqrestore(&i2o_config_lock, flags);
unlock_kernel();
mutex_unlock(&i2o_cfg_mutex);
return 0;
}
@ -1076,14 +1077,14 @@ static int cfg_fasync(int fd, struct file *fp, int on)
struct i2o_cfg_info *p;
int ret = -EBADF;
lock_kernel();
mutex_lock(&i2o_cfg_mutex);
for (p = open_files; p; p = p->next)
if (p->q_id == id)
break;
if (p)
ret = fasync_helper(fd, fp, on, &p->fasync);
unlock_kernel();
mutex_unlock(&i2o_cfg_mutex);
return ret;
}
@ -1093,7 +1094,7 @@ static int cfg_release(struct inode *inode, struct file *file)
struct i2o_cfg_info *p, **q;
unsigned long flags;
lock_kernel();
mutex_lock(&i2o_cfg_mutex);
spin_lock_irqsave(&i2o_config_lock, flags);
for (q = &open_files; (p = *q) != NULL; q = &p->next) {
if (p->q_id == id) {
@ -1103,7 +1104,7 @@ static int cfg_release(struct inode *inode, struct file *file)
}
}
spin_unlock_irqrestore(&i2o_config_lock, flags);
unlock_kernel();
mutex_unlock(&i2o_cfg_mutex);
return 0;
}

7
drivers/scsi/3w-9xxx.c
View File

@ -92,7 +92,6 @@
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -105,6 +104,7 @@
/* Globals */
#define TW_DRIVER_VERSION "2.26.02.014"
static DEFINE_MUTEX(twa_chrdev_mutex);
static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
static unsigned int twa_device_extension_count;
static int twa_major = -1;
@ -658,7 +658,7 @@ static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long
int retval = TW_IOCTL_ERROR_OS_EFAULT;
void __user *argp = (void __user *)arg;
lock_kernel();
mutex_lock(&twa_chrdev_mutex);
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
@ -879,7 +879,7 @@ out3:
out2:
mutex_unlock(&tw_dev->ioctl_lock);
out:
unlock_kernel();
mutex_unlock(&twa_chrdev_mutex);
return retval;
} /* End twa_chrdev_ioctl() */
@ -890,7 +890,6 @@ static int twa_chrdev_open(struct inode *inode, struct file *file)
unsigned int minor_number;
int retval = TW_IOCTL_ERROR_OS_ENODEV;
cycle_kernel_lock();
minor_number = iminor(inode);
if (minor_number >= twa_device_extension_count)
goto out;

7
drivers/scsi/3w-sas.c
View File

@ -64,7 +64,6 @@
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -77,6 +76,7 @@
/* Globals */
#define TW_DRIVER_VERSION "3.26.02.000"
static DEFINE_MUTEX(twl_chrdev_mutex);
static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
static unsigned int twl_device_extension_count;
static int twl_major = -1;
@ -764,7 +764,7 @@ static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long
int retval = -EFAULT;
void __user *argp = (void __user *)arg;
lock_kernel();
mutex_lock(&twl_chrdev_mutex);
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
@ -861,7 +861,7 @@ out3:
out2:
mutex_unlock(&tw_dev->ioctl_lock);
out:
unlock_kernel();
mutex_unlock(&twl_chrdev_mutex);
return retval;
} /* End twl_chrdev_ioctl() */
@ -876,7 +876,6 @@ static int twl_chrdev_open(struct inode *inode, struct file *file)
goto out;
}
cycle_kernel_lock();
minor_number = iminor(inode);
if (minor_number >= twl_device_extension_count)
goto out;

9
drivers/scsi/3w-xxxx.c
View File

@ -199,7 +199,6 @@
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
@ -221,6 +220,7 @@
/* Globals */
#define TW_DRIVER_VERSION "1.26.02.003"
static DEFINE_MUTEX(tw_mutex);
static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
static int tw_device_extension_count = 0;
static int twe_major = -1;
@ -900,10 +900,10 @@ static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long a
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
lock_kernel();
mutex_lock(&tw_mutex);
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
unlock_kernel();
mutex_unlock(&tw_mutex);
return -EINTR;
}
@ -1034,7 +1034,7 @@ out2:
dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
out:
mutex_unlock(&tw_dev->ioctl_lock);
unlock_kernel();
mutex_unlock(&tw_mutex);
return retval;
} /* End tw_chrdev_ioctl() */
@ -1044,7 +1044,6 @@ static int tw_chrdev_open(struct inode *inode, struct file *file)
{
unsigned int minor_number;
cycle_kernel_lock();
dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
minor_number = iminor(inode);

15
drivers/scsi/aacraid/linit.c
View File

@ -38,7 +38,7 @@
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/syscalls.h>
#include <linux/delay.h>
@ -76,6 +76,7 @@ MODULE_DESCRIPTION("Dell PERC2, 2/Si, 3/Si, 3/Di, "
MODULE_LICENSE("GPL");
MODULE_VERSION(AAC_DRIVER_FULL_VERSION);
static DEFINE_MUTEX(aac_mutex);
static LIST_HEAD(aac_devices);
static int aac_cfg_major = -1;
char aac_driver_version[] = AAC_DRIVER_FULL_VERSION;
@ -678,7 +679,7 @@ static int aac_cfg_open(struct inode *inode, struct file *file)
unsigned minor_number = iminor(inode);
int err = -ENODEV;
lock_kernel(); /* BKL pushdown: nothing else protects this list */
mutex_lock(&aac_mutex); /* BKL pushdown: nothing else protects this list */
list_for_each_entry(aac, &aac_devices, entry) {
if (aac->id == minor_number) {
file->private_data = aac;
@ -686,7 +687,7 @@ static int aac_cfg_open(struct inode *inode, struct file *file)
break;
}
}
unlock_kernel();
mutex_unlock(&aac_mutex);
return err;
}
@ -711,9 +712,9 @@ static long aac_cfg_ioctl(struct file *file,
int ret;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
lock_kernel();
mutex_lock(&aac_mutex);
ret = aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
unlock_kernel();
mutex_unlock(&aac_mutex);
return ret;
}
@ -722,7 +723,7 @@ static long aac_cfg_ioctl(struct file *file,
static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&aac_mutex);
switch (cmd) {
case FSACTL_MINIPORT_REV_CHECK:
case FSACTL_SENDFIB:
@ -756,7 +757,7 @@ static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long
ret = -ENOIOCTLCMD;
break;
}
unlock_kernel();
mutex_unlock(&aac_mutex);
return ret;
}

8
drivers/scsi/ch.c
View File

@ -22,7 +22,6 @@
#include <linux/chio.h> /* here are all the ioctls */
#include <linux/mutex.h>
#include <linux/idr.h>
#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
@ -44,6 +43,7 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
static DEFINE_MUTEX(ch_mutex);
static int init = 1;
module_param(init, int, 0444);
MODULE_PARM_DESC(init, \
@ -581,19 +581,19 @@ ch_open(struct inode *inode, struct file *file)
scsi_changer *ch;
int minor = iminor(inode);
lock_kernel();
mutex_lock(&ch_mutex);
spin_lock(&ch_index_lock);
ch = idr_find(&ch_index_idr, minor);
if (NULL == ch || scsi_device_get(ch->device)) {
spin_unlock(&ch_index_lock);
unlock_kernel();
mutex_unlock(&ch_mutex);
return -ENXIO;
}
spin_unlock(&ch_index_lock);
file->private_data = ch;
unlock_kernel();
mutex_unlock(&ch_mutex);
return 0;
}

18
drivers/scsi/dpt_i2o.c
View File

@ -49,7 +49,6 @@ MODULE_DESCRIPTION("Adaptec I2O RAID Driver");
#include <linux/kernel.h> /* for printk */
#include <linux/sched.h>
#include <linux/reboot.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
@ -76,6 +75,7 @@ MODULE_DESCRIPTION("Adaptec I2O RAID Driver");
* Needed for our management apps
*============================================================================
*/
static DEFINE_MUTEX(adpt_mutex);
static dpt_sig_S DPTI_sig = {
{'d', 'P', 't', 'S', 'i', 'G'}, SIG_VERSION,
#ifdef __i386__
@ -1732,12 +1732,12 @@ static int adpt_open(struct inode *inode, struct file *file)
int minor;
adpt_hba* pHba;
lock_kernel();
mutex_lock(&adpt_mutex);
//TODO check for root access
//
minor = iminor(inode);
if (minor >= hba_count) {
unlock_kernel();
mutex_unlock(&adpt_mutex);
return -ENXIO;
}
mutex_lock(&adpt_configuration_lock);
@ -1748,7 +1748,7 @@ static int adpt_open(struct inode *inode, struct file *file)
}
if (pHba == NULL) {
mutex_unlock(&adpt_configuration_lock);
unlock_kernel();
mutex_unlock(&adpt_mutex);
return -ENXIO;
}
@ -1759,7 +1759,7 @@ static int adpt_open(struct inode *inode, struct file *file)
pHba->in_use = 1;
mutex_unlock(&adpt_configuration_lock);
unlock_kernel();
mutex_unlock(&adpt_mutex);
return 0;
}
@ -2160,9 +2160,9 @@ static long adpt_unlocked_ioctl(struct file *file, uint cmd, ulong arg)
inode = file->f_dentry->d_inode;
lock_kernel();
mutex_lock(&adpt_mutex);
ret = adpt_ioctl(inode, file, cmd, arg);
unlock_kernel();
mutex_unlock(&adpt_mutex);
return ret;
}
@ -2176,7 +2176,7 @@ static long compat_adpt_ioctl(struct file *file,
inode = file->f_dentry->d_inode;
lock_kernel();
mutex_lock(&adpt_mutex);
switch(cmd) {
case DPT_SIGNATURE:
@ -2194,7 +2194,7 @@ static long compat_adpt_ioctl(struct file *file,
ret = -ENOIOCTLCMD;
}
unlock_kernel();
mutex_unlock(&adpt_mutex);
return ret;
}

11
drivers/scsi/gdth.c
View File

@ -120,7 +120,7 @@
#include <linux/timer.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#ifdef GDTH_RTC
@ -140,6 +140,7 @@
#include <scsi/scsi_host.h>
#include "gdth.h"
static DEFINE_MUTEX(gdth_mutex);
static void gdth_delay(int milliseconds);
static void gdth_eval_mapping(u32 size, u32 *cyls, int *heads, int *secs);
static irqreturn_t gdth_interrupt(int irq, void *dev_id);
@ -4042,12 +4043,12 @@ static int gdth_open(struct inode *inode, struct file *filep)
{
gdth_ha_str *ha;
lock_kernel();
mutex_lock(&gdth_mutex);
list_for_each_entry(ha, &gdth_instances, list) {
if (!ha->sdev)
ha->sdev = scsi_get_host_dev(ha->shost);
}
unlock_kernel();
mutex_unlock(&gdth_mutex);
TRACE(("gdth_open()\n"));
return 0;
@ -4615,9 +4616,9 @@ static long gdth_unlocked_ioctl(struct file *file, unsigned int cmd,
{
int ret;
lock_kernel();
mutex_lock(&gdth_mutex);
ret = gdth_ioctl(file, cmd, arg);
unlock_kernel();
mutex_unlock(&gdth_mutex);
return ret;
}

8
drivers/scsi/megaraid.c
View File

@ -46,7 +46,7 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <scsi/scsicam.h>
@ -62,6 +62,7 @@ MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
MODULE_LICENSE ("GPL");
MODULE_VERSION(MEGARAID_MODULE_VERSION);
static DEFINE_MUTEX(megadev_mutex);
static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
module_param(max_cmd_per_lun, uint, 0);
MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
@ -3282,7 +3283,6 @@ mega_init_scb(adapter_t *adapter)
static int
megadev_open (struct inode *inode, struct file *filep)
{
cycle_kernel_lock();
/*
* Only allow superuser to access private ioctl interface
*/
@ -3701,9 +3701,9 @@ megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
int ret;
lock_kernel();
mutex_lock(&megadev_mutex);
ret = megadev_ioctl(filep, cmd, arg);
unlock_kernel();
mutex_unlock(&megadev_mutex);
return ret;
}

8
drivers/scsi/megaraid/megaraid_mm.c
View File

@ -16,11 +16,12 @@
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include "megaraid_mm.h"
// Entry points for char node driver
static DEFINE_MUTEX(mraid_mm_mutex);
static int mraid_mm_open(struct inode *, struct file *);
static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long);
@ -98,7 +99,6 @@ mraid_mm_open(struct inode *inode, struct file *filep)
*/
if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
cycle_kernel_lock();
return 0;
}
@ -224,9 +224,9 @@ mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
int err;
/* inconsistant: mraid_mm_compat_ioctl doesn't take the BKL */
lock_kernel();
mutex_lock(&mraid_mm_mutex);
err = mraid_mm_ioctl(filep, cmd, arg);
unlock_kernel();
mutex_unlock(&mraid_mm_mutex);
return err;
}

2
drivers/scsi/megaraid/megaraid_sas.c
View File

@ -33,7 +33,6 @@
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include <linux/uio.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
@ -3557,7 +3556,6 @@ static void megasas_shutdown(struct pci_dev *pdev)
*/
static int megasas_mgmt_open(struct inode *inode, struct file *filep)
{
cycle_kernel_lock();
/*
* Allow only those users with admin rights
*/

11
drivers/scsi/mpt2sas/mpt2sas_ctl.c
View File

@ -51,7 +51,7 @@
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/compat.h>
#include <linux/poll.h>
@ -61,6 +61,7 @@
#include "mpt2sas_base.h"
#include "mpt2sas_ctl.h"
static DEFINE_MUTEX(_ctl_mutex);
static struct fasync_struct *async_queue;
static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
@ -2238,9 +2239,9 @@ _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&_ctl_mutex);
ret = _ctl_ioctl_main(file, cmd, (void __user *)arg);
unlock_kernel();
mutex_unlock(&_ctl_mutex);
return ret;
}
@ -2309,12 +2310,12 @@ _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&_ctl_mutex);
if (cmd == MPT2COMMAND32)
ret = _ctl_compat_mpt_command(file, cmd, arg);
else
ret = _ctl_ioctl_main(file, cmd, (void __user *)arg);
unlock_kernel();
mutex_unlock(&_ctl_mutex);
return ret;
}
#endif

15
drivers/scsi/osst.c
View File

@ -51,7 +51,7 @@ static const char * osst_version = "0.99.4";
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/dma.h>
#include <asm/system.h>
@ -80,6 +80,7 @@ static const char * osst_version = "0.99.4";
#include "osst_options.h"
#include "osst_detect.h"
static DEFINE_MUTEX(osst_int_mutex);
static int max_dev = 0;
static int write_threshold_kbs = 0;
static int max_sg_segs = 0;
@ -4807,9 +4808,9 @@ static int os_scsi_tape_open(struct inode * inode, struct file * filp)
{
int ret;
lock_kernel();
mutex_lock(&osst_int_mutex);
ret = __os_scsi_tape_open(inode, filp);
unlock_kernel();
mutex_unlock(&osst_int_mutex);
return ret;
}
@ -4943,9 +4944,9 @@ static long osst_ioctl(struct file * file,
char * name = tape_name(STp);
void __user * p = (void __user *)arg;
lock_kernel();
mutex_lock(&osst_int_mutex);
if (mutex_lock_interruptible(&STp->lock)) {
unlock_kernel();
mutex_unlock(&osst_int_mutex);
return -ERESTARTSYS;
}
@ -5260,14 +5261,14 @@ static long osst_ioctl(struct file * file,
mutex_unlock(&STp->lock);
retval = scsi_ioctl(STp->device, cmd_in, p);
unlock_kernel();
mutex_unlock(&osst_int_mutex);
return retval;
out:
if (SRpnt) osst_release_request(SRpnt);
mutex_unlock(&STp->lock);
unlock_kernel();
mutex_unlock(&osst_int_mutex);
return retval;
}

2
drivers/scsi/scsi_tgt_if.c
View File

@ -22,7 +22,6 @@
#include <linux/miscdevice.h>
#include <linux/gfp.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@ -323,7 +322,6 @@ static int tgt_open(struct inode *inode, struct file *file)
{
tx_ring.tr_idx = rx_ring.tr_idx = 0;
cycle_kernel_lock();
return 0;
}

12
drivers/scsi/sg.c
View File

@ -49,7 +49,7 @@ static int sg_version_num = 30534; /* 2 digits for each component */
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/blktrace_api.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include "scsi.h"
#include <scsi/scsi_dbg.h>
@ -103,6 +103,8 @@ static int scatter_elem_sz_prev = SG_SCATTER_SZ;
static int sg_add(struct device *, struct class_interface *);
static void sg_remove(struct device *, struct class_interface *);
static DEFINE_MUTEX(sg_mutex);
static DEFINE_IDR(sg_index_idr);
static DEFINE_RWLOCK(sg_index_lock); /* Also used to lock
file descriptor list for device */
@ -229,7 +231,7 @@ sg_open(struct inode *inode, struct file *filp)
int res;
int retval;
lock_kernel();
mutex_lock(&sg_mutex);
nonseekable_open(inode, filp);
SCSI_LOG_TIMEOUT(3, printk("sg_open: dev=%d, flags=0x%x\n", dev, flags));
sdp = sg_get_dev(dev);
@ -314,7 +316,7 @@ sdp_put:
sg_put:
if (sdp)
sg_put_dev(sdp);
unlock_kernel();
mutex_unlock(&sg_mutex);
return retval;
}
@ -1092,9 +1094,9 @@ sg_unlocked_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
{
int ret;
lock_kernel();
mutex_lock(&sg_mutex);
ret = sg_ioctl(filp, cmd_in, arg);
unlock_kernel();
mutex_unlock(&sg_mutex);
return ret;
}