The patch titled
watchdog: cpu5_wdt: switch to unlocked_ioctl
has been added to the -mm tree. Its filename is
watchdog-cpu5_wdt-switch-to-unlocked_ioctl.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: watchdog: cpu5_wdt: switch to unlocked_ioctl
From: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/watchdog/cpu5wdt.c | 144 +++++++++++++++++------------------
1 file changed, 70 insertions(+), 74 deletions(-)
diff -puN drivers/watchdog/cpu5wdt.c~watchdog-cpu5_wdt-switch-to-unlocked_ioctl drivers/watchdog/cpu5wdt.c
--- a/drivers/watchdog/cpu5wdt.c~watchdog-cpu5_wdt-switch-to-unlocked_ioctl
+++ a/drivers/watchdog/cpu5wdt.c
@@ -30,16 +30,16 @@
#include <linux/timer.h>
#include <linux/completion.h>
#include <linux/jiffies.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <linux/watchdog.h>
/* adjustable parameters */
-static int verbose = 0;
+static int verbose;
static int port = 0x91;
static int ticks = 10000;
+static spinlock_t cpu5wdt_lock;
#define PFX "cpu5wdt: "
@@ -70,12 +70,13 @@ static struct {
static void cpu5wdt_trigger(unsigned long unused)
{
- if ( verbose > 2 )
+ if (verbose > 2)
printk(KERN_DEBUG PFX "trigger at %i ticks\n", ticks);
- if( cpu5wdt_device.running )
+ if (cpu5wdt_device.running)
ticks--;
+ spin_lock(&cpu5wdt_lock);
/* keep watchdog alive */
outb(1, port + CPU5WDT_TRIGGER_REG);
@@ -86,6 +87,7 @@ static void cpu5wdt_trigger(unsigned lon
/* ticks doesn't matter anyway */
complete(&cpu5wdt_device.stop);
}
+ spin_unlock(&cpu5wdt_lock);
}
@@ -93,14 +95,17 @@ static void cpu5wdt_reset(void)
{
ticks = cpu5wdt_device.default_ticks;
- if ( verbose )
+ if (verbose)
printk(KERN_DEBUG PFX "reset (%i ticks)\n", (int) ticks);
}
static void cpu5wdt_start(void)
{
- if ( !cpu5wdt_device.queue ) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&cpu5wdt_lock, flags);
+ if (!cpu5wdt_device.queue) {
cpu5wdt_device.queue = 1;
outb(0, port + CPU5WDT_TIME_A_REG);
outb(0, port + CPU5WDT_TIME_B_REG);
@@ -111,18 +116,20 @@ static void cpu5wdt_start(void)
}
/* if process dies, counter is not decremented */
cpu5wdt_device.running++;
+ spin_unlock_irqrestore(&cpu5wdt_lock, flags);
}
static int cpu5wdt_stop(void)
{
- if ( cpu5wdt_device.running )
- cpu5wdt_device.running = 0;
+ unsigned long flags;
+ spin_lock_irqsave(&cpu5wdt_lock, flags);
+ if (cpu5wdt_device.running)
+ cpu5wdt_device.running = 0;
ticks = cpu5wdt_device.default_ticks;
-
- if ( verbose )
+ spin_unlock_irqrestore(&cpu5wdt_lock, flags);
+ if (verbose)
printk(KERN_CRIT PFX "stop not possible\n");
-
return -EIO;
}
@@ -130,9 +137,8 @@ static int cpu5wdt_stop(void)
static int cpu5wdt_open(struct inode *inode, struct file *file)
{
- if ( test_and_set_bit(0, &cpu5wdt_device.inuse) )
+ if (test_and_set_bit(0, &cpu5wdt_device.inuse))
return -EBUSY;
-
return nonseekable_open(inode, file);
}
@@ -142,67 +148,58 @@ static int cpu5wdt_release(struct inode
return 0;
}
-static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long cpu5wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
+ int __user *p = argp;
unsigned int value;
- static struct watchdog_info ident =
- {
+ static struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "CPU5 WDT",
};
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- cpu5wdt_reset();
- break;
- case WDIOC_GETSTATUS:
- value = inb(port + CPU5WDT_STATUS_REG);
- value = (value >> 2) & 1;
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETBOOTSTATUS:
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETSUPPORT:
- if ( copy_to_user(argp, &ident, sizeof(ident)) )
- return -EFAULT;
- break;
- case WDIOC_SETOPTIONS:
- if ( copy_from_user(&value, argp, sizeof(int)) )
- return -EFAULT;
- switch(value) {
- case WDIOS_ENABLECARD:
- cpu5wdt_start();
- break;
- case WDIOS_DISABLECARD:
- return cpu5wdt_stop();
- default:
- return -EINVAL;
- }
- break;
- default:
- return -ENOTTY;
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ cpu5wdt_reset();
+ break;
+ case WDIOC_GETSTATUS:
+ value = inb(port + CPU5WDT_STATUS_REG);
+ value = (value >> 2) & 1;
+ return put_user(value, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if (get_user(value, p))
+ return -EFAULT;
+ if (value & WDIOS_ENABLECARD)
+ cpu5wdt_start();
+ if (value & WDIOS_DISABLECARD)
+ cpu5wdt_stop();
+ break;
+ default:
+ return -ENOTTY;
}
return 0;
}
-static ssize_t cpu5wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t cpu5wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- if ( !count )
+ if (!count)
return -EIO;
-
cpu5wdt_reset();
-
return count;
}
static const struct file_operations cpu5wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = cpu5wdt_ioctl,
+ .unlocked_ioctl = cpu5wdt_ioctl,
.open = cpu5wdt_open,
.write = cpu5wdt_write,
.release = cpu5wdt_release,
@@ -221,37 +218,36 @@ static int __devinit cpu5wdt_init(void)
unsigned int val;
int err;
- if ( verbose )
- printk(KERN_DEBUG PFX "port=0x%x, verbose=%i\n", port, verbose);
+ if (verbose)
+ printk(KERN_DEBUG PFX
+ "port=0x%x, verbose=%i\n", port, verbose);
- if ( !request_region(port, CPU5WDT_EXTENT, PFX) ) {
+ init_completion(&cpu5wdt_device.stop);
+ spin_lock_init(&cpu5wdt_lock);
+ cpu5wdt_device.queue = 0;
+ setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
+ cpu5wdt_device.default_ticks = ticks;
+
+ if (!request_region(port, CPU5WDT_EXTENT, PFX)) {
printk(KERN_ERR PFX "request_region failed\n");
err = -EBUSY;
goto no_port;
}
- if ( (err = misc_register(&cpu5wdt_misc)) < 0 ) {
- printk(KERN_ERR PFX "misc_register failed\n");
- goto no_misc;
- }
-
/* watchdog reboot? */
val = inb(port + CPU5WDT_STATUS_REG);
val = (val >> 2) & 1;
- if ( !val )
+ if (!val)
printk(KERN_INFO PFX "sorry, was my fault\n");
- init_completion(&cpu5wdt_device.stop);
- cpu5wdt_device.queue = 0;
-
- clear_bit(0, &cpu5wdt_device.inuse);
-
- setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
+ err = misc_register(&cpu5wdt_misc);
+ if (err < 0) {
+ printk(KERN_ERR PFX "misc_register failed\n");
+ goto no_misc;
+ }
- cpu5wdt_device.default_ticks = ticks;
printk(KERN_INFO PFX "init success\n");
-
return 0;
no_misc:
@@ -267,7 +263,7 @@ static int __devinit cpu5wdt_init_module
static void __devexit cpu5wdt_exit(void)
{
- if ( cpu5wdt_device.queue ) {
+ if (cpu5wdt_device.queue) {
cpu5wdt_device.queue = 0;
wait_for_completion(&cpu5wdt_device.stop);
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxx are
linux-next.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch
watchdog-clean-acquirewdt-and-check-for-bkl-dependancies.patch
watchdog-clean-up-and-check-advantech-watchdog.patch
watchdog-ali-watchdog-locking-and-style.patch
watchdog-ar7-watchdog.patch
watchdog-atp-watchdog.patch
watchdog-at91-watchdog-to-unlocked_ioctl.patch
watchdog-cpu5_wdt-switch-to-unlocked_ioctl.patch
watchdog-davinci_wdt-unlocked_ioctl-and-check-locking.patch
watchdog-ep93xx_wdt-unlocked_ioctl.patch
watchdog-eurotechwdt-unlocked_ioctl-code-lock-check-and-tidy.patch
watchdog-hpwdt-couple-of-include-cleanups.patch
watchdog-ib700wdt-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-i6300esb-style-unlocked_ioctl-cleanup.patch
watchdog-ibmasr-coding-style-locking-verify.patch
watchdog-indydog-clean-up-and-tidy.patch
watchdog-iop-watchdog-switch-to-unlocked_ioctl.patch
watchdog-it8712f-unlocked_ioctl.patch
watchdog-bfin-watchdog-cleanup-and-unlocked_ioctl.patch
watchdog-ixp2000_wdt-clean-up-and-unlocked_ioctl.patch
watchdog-ixp4xx_wdt-unlocked_ioctl.patch
watchdog-ks8695_wdt-clean-up-coding-style-unlocked_ioctl.patch
watchdog-machzwd-clean-up-coding-style-unlocked_ioctl.patch
watchdog-mixcomwd-coding-style-locking-unlocked_ioctl.patch
watchdog-mpc-watchdog-clean-up-and-locking.patch
watchdog-mpcore-watchdog-unlocked_ioctl-and-bkl-work.patch
watchdog-mtx-1_wdt-clean-up-coding-style-unlocked-ioctl.patch
watchdog-mv64x60_wdt-clean-up-and-locking-checks.patch
watchdog-omap_wdt-locking-unlocked_ioctl-tidy.patch
watchdog-pc87413_wdt-clean-up-coding-style-unlocked_ioctl.patch
watchdog-pcwd-clean-up-unlocked_ioctl-usage.patch
watchdog-pnx4008_wdt-unlocked_ioctl-setup.patch
watchdog-rm9k_wdt-clean-up.patch
watchdog-s3c2410-watchdog-cleanup-and-switch-to-unlocked_ioctl.patch
watchdog-sa1100_wdt-switch-to-unlocked_ioctl.patch
watchdog-sbc60xxwdt-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-stg7240_wdt-unlocked_ioctl.patch
watchdog-sbc8360-clean-up.patch
watchdog-sbc_epx_c3_wdt-switch-to-unlocked_ioctl.patch
watchdog-sb_wdog-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-sc1200_wdt-clean-up-fix-locking-and-use-unlocked_ioctl.patch
watchdog-sc520_wdt-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-scx200_wdt-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-shwdt-coding-style-cleanup-switch-to-unlocked_ioctl.patch
watchdog-smsc37b787_wdt-coding-style-switch-to-unlocked_ioctl.patch
watchdog-softdog-clean-up-coding-style-and-switch-to-unlocked_ioctl.patch
watchdog-txx9-fix-locking-switch-to-unlocked_ioctl.patch
watchdog-w83627hf-coding-style-clean-up-and-switch-to-unlocked_ioctl.patch
watchdog-w83877f_wdt-clean-up-code-coding-style-switch-to-unlocked_ioctl.patch
watchdog-w83977f_wdt-clean-up-coding-style-and-switch-to-unlocked_ioctl.patch
watchdog-wafer5823wdt-clean-up-coding-style-switch-to-unlocked_ioctl.patch
watchdog-wdrtas-clean-up-coding-style-switch-to-unlocked_ioctl.patch
watchdog-wdt285-switch-to-unlocked_ioctl-and-tidy-up-oddments-of-coding-style.patch
watchdog-wdt977-clean-up-coding-style-and-switch-to-unlocked_ioctl.patch
watchdog-wdt501-pci-clean-up-coding-style-and-switch-to-unlocked_ioctl.patch
mm-fix-atomic_t-overflow-in-vm.patch
serial-8250_gscc-add-module_license.patch
remove-is_tty.patch
riscom8-remove-redundant-null-pointer-test.patch
unexport-proc_clear_tty.patch
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