diff options
Diffstat (limited to 'drivers/ieee1394/raw1394.c')
-rw-r--r-- | drivers/ieee1394/raw1394.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/ieee1394/raw1394.c b/drivers/ieee1394/raw1394.c index 6fa9e4a2184..975ed7062aa 100644 --- a/drivers/ieee1394/raw1394.c +++ b/drivers/ieee1394/raw1394.c @@ -34,6 +34,7 @@ #include <linux/fs.h> #include <linux/poll.h> #include <linux/module.h> +#include <linux/mutex.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/vmalloc.h> @@ -2541,11 +2542,18 @@ static int raw1394_read_cycle_timer(struct file_info *fi, void __user * uaddr) static int raw1394_mmap(struct file *file, struct vm_area_struct *vma) { struct file_info *fi = file->private_data; + int ret; + + mutex_lock(&fi->state_mutex); if (fi->iso_state == RAW1394_ISO_INACTIVE) - return -EINVAL; + ret = -EINVAL; + else + ret = dma_region_mmap(&fi->iso_handle->data_buf, file, vma); + + mutex_unlock(&fi->state_mutex); - return dma_region_mmap(&fi->iso_handle->data_buf, file, vma); + return ret; } /* ioctl is only used for rawiso operations */ @@ -2659,10 +2667,12 @@ static long do_raw1394_ioctl(struct file *file, unsigned int cmd, static long raw1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { + struct file_info *fi = file->private_data; long ret; - lock_kernel(); + + mutex_lock(&fi->state_mutex); ret = do_raw1394_ioctl(file, cmd, arg); - unlock_kernel(); + mutex_unlock(&fi->state_mutex); return ret; } @@ -2724,7 +2734,7 @@ static long raw1394_compat_ioctl(struct file *file, void __user *argp = (void __user *)arg; long err; - lock_kernel(); + mutex_lock(&fi->state_mutex); switch (cmd) { /* These requests have same format as long as 'int' has same size. */ case RAW1394_IOC_ISO_RECV_INIT: @@ -2757,7 +2767,7 @@ static long raw1394_compat_ioctl(struct file *file, err = -EINVAL; break; } - unlock_kernel(); + mutex_unlock(&fi->state_mutex); return err; } @@ -2791,6 +2801,7 @@ static int raw1394_open(struct inode *inode, struct file *file) fi->notification = (u8) RAW1394_NOTIFY_ON; /* busreset notification */ INIT_LIST_HEAD(&fi->list); + mutex_init(&fi->state_mutex); fi->state = opened; INIT_LIST_HEAD(&fi->req_pending); INIT_LIST_HEAD(&fi->req_complete); |