dsp56k: BKL pushdown

Push the BKL down into the driver ioctl methods

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 33c466a4888f..19b88504e960 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -36,10 +36,10 @@
 #include <linux/smp_lock.h>
 #include <linux/firmware.h>
 #include <linux/platform_device.h>
+#include <linux/uaccess.h>      /* For put_user and get_user */
 
 #include <asm/atarihw.h>
 #include <asm/traps.h>
-#include <asm/uaccess.h>        /* For put_user and get_user */
 
 #include <asm/dsp56k.h>
 
@@ -303,8 +303,8 @@ static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t co
         }
 }
 
-static int dsp56k_ioctl(struct inode *inode, struct file *file,
-                        unsigned int cmd, unsigned long arg)
+static long dsp56k_ioctl(struct file *file, unsigned int cmd,
+                                                        unsigned long arg)
 {
         int dev = iminor(inode) & 0x0f;
         void __user *argp = (void __user *)arg;
@@ -331,8 +331,9 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
                         if (len > DSP56K_MAX_BINARY_LENGTH) {
                                 return -EINVAL;
                         }
-    
+                        lock_kernel();
                         r = dsp56k_upload(bin, len);
+                        unlock_kernel();
                         if (r < 0) {
                                 return r;
                         }
@@ -342,12 +343,16 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
                 case DSP56K_SET_TX_WSIZE:
                         if (arg > 4 || arg < 1)
                                 return -EINVAL;
+                        lock_kernel();
                         dsp56k.tx_wsize = (int) arg;
+                        unlock_kernel();
                         break;
                 case DSP56K_SET_RX_WSIZE:
                         if (arg > 4 || arg < 1)
                                 return -EINVAL;
+                        lock_kernel();
                         dsp56k.rx_wsize = (int) arg;
+                        unlock_kernel();
                         break;
                 case DSP56K_HOST_FLAGS:
                 {
@@ -359,6 +364,7 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
                         if(get_user(out, &hf->out) < 0)
                                 return -EFAULT;
 
+                        lock_kernel();
                         if ((dir & 0x1) && (out & 0x1))
                                 dsp56k_host_interface.icr |= DSP56K_ICR_HF0;
                         else if (dir & 0x1)
@@ -373,14 +379,16 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
                         if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2;
                         if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4;
                         if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8;
-
+                        unlock_kernel();
                         return put_user(status, &hf->status);
                 }
                 case DSP56K_HOST_CMD:
                         if (arg > 31 || arg < 0)
                                 return -EINVAL;
+                        lock_kernel();
                         dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
                                                              DSP56K_CVR_HC);
+                        unlock_kernel();
                         break;
                 default:
                         return -EINVAL;
@@ -472,7 +480,7 @@ static const struct file_operations dsp56k_fops = {
         .owner          = THIS_MODULE,
         .read           = dsp56k_read,
         .write          = dsp56k_write,
-        .ioctl          = dsp56k_ioctl,
+        .unlocked_ioctl = dsp56k_ioctl,
         .open           = dsp56k_open,
         .release        = dsp56k_release,
 };