diff options
Diffstat (limited to 'drivers/pci/hotplug/cpqphp_sysfs.c')
| -rw-r--r-- | drivers/pci/hotplug/cpqphp_sysfs.c | 32 |
1 files changed, 8 insertions, 24 deletions
diff --git a/drivers/pci/hotplug/cpqphp_sysfs.c b/drivers/pci/hotplug/cpqphp_sysfs.c index e6089bdb6e5..4a392c44e3d 100644 --- a/drivers/pci/hotplug/cpqphp_sysfs.c +++ b/drivers/pci/hotplug/cpqphp_sysfs.c @@ -28,15 +28,17 @@ #include <linux/module.h> #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/types.h> #include <linux/proc_fs.h> #include <linux/workqueue.h> #include <linux/pci.h> #include <linux/pci_hotplug.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/debugfs.h> #include "cpqphp.h" +static DEFINE_MUTEX(cpqphp_mutex); static int show_ctrl (struct controller *ctrl, char *buf) { char *out = buf; @@ -77,7 +79,7 @@ static int show_ctrl (struct controller *ctrl, char *buf) static int show_dev (struct controller *ctrl, char *buf) { - char * out = buf; + char *out = buf; int index; struct pci_resource *res; struct pci_func *new_slot; @@ -146,7 +148,7 @@ static int open(struct inode *inode, struct file *file) struct ctrl_dbg *dbg; int retval = -ENOMEM; - lock_kernel(); + mutex_lock(&cpqphp_mutex); dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); if (!dbg) goto exit; @@ -159,32 +161,14 @@ static int open(struct inode *inode, struct file *file) file->private_data = dbg; retval = 0; exit: - unlock_kernel(); + mutex_unlock(&cpqphp_mutex); return retval; } static loff_t lseek(struct file *file, loff_t off, int whence) { - struct ctrl_dbg *dbg; - loff_t new = -1; - - lock_kernel(); - dbg = file->private_data; - - switch (whence) { - case 0: - new = off; - break; - case 1: - new = file->f_pos + off; - break; - } - if (new < 0 || new > dbg->size) { - unlock_kernel(); - return -EINVAL; - } - unlock_kernel(); - return (file->f_pos = new); + struct ctrl_dbg *dbg = file->private_data; + return fixed_size_llseek(file, off, whence, dbg->size); } static ssize_t read(struct file *file, char __user *buf, |