scsi: Push down BKL into ioctl functions

Push down the bkl into ioctl functions on the scsi layer.

[jkacur: Forward declaration missing ';'.
Conflicting declaraction in megaraid.h changed
Fixed missing inodes declarations]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
index 54c5ffb1eaa1..8af380951f17 100644
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -750,19 +750,22 @@ static void twl_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_comm
 
 /* This function handles ioctl for the character device
    This interface is used by smartmontools open source software */
-static int twl_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         long timeout;
         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
         dma_addr_t dma_handle;
         int request_id = 0;
         TW_Ioctl_Driver_Command driver_command;
+        struct inode *inode = file->f_dentry->d_inode;
         TW_Ioctl_Buf_Apache *tw_ioctl;
         TW_Command_Full *full_command_packet;
         TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
         int retval = -EFAULT;
         void __user *argp = (void __user *)arg;
 
+        lock_kernel();
+
         /* Only let one of these through at a time */
         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
                 retval = -EINTR;
@@ -858,6 +861,7 @@ out3:
 out2:
         mutex_unlock(&tw_dev->ioctl_lock);
 out:
+        unlock_kernel();
         return retval;
 } /* End twl_chrdev_ioctl() */
 
@@ -884,7 +888,7 @@ out:
 /* File operations struct for character device */
 static const struct file_operations twl_fops = {
         .owner          = THIS_MODULE,
-        .ioctl          = twl_chrdev_ioctl,
+        .unlocked_ioctl = twl_chrdev_ioctl,
         .open           = twl_chrdev_open,
         .release        = NULL
 };