Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[cascardo/linux.git] / drivers / char / mbcs.c

diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index f4716ad..87c67b4 100644 (file)
--- a/drivers/char/mbcs.c
+++ b/drivers/char/mbcs.c
@@ -15,6 +15,7 @@
 #include <linux/moduleparam.h>
 #include <linux/types.h>
 #include <linux/ioport.h>
+#include <linux/kernel.h>
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
@@ -24,6 +25,7 @@
 #include <linux/mm.h>
 #include <linux/uio.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -382,15 +384,19 @@ static int mbcs_open(struct inode *ip, struct file *fp)
        struct mbcs_soft *soft;
        int minor;
 
+       lock_kernel();
        minor = iminor(ip);
 
+       /* Nothing protects access to this list... */
        list_for_each_entry(soft, &soft_list, list) {
                if (soft->nasid == minor) {
                        fp->private_data = soft->cxdev;
+                       unlock_kernel();
                        return 0;
                }
        }
 
+       unlock_kernel();
        return -ENODEV;
 }
 
@@ -710,8 +716,8 @@ static ssize_t show_algo(struct device *dev, struct device_attribute *attr, char
         */
        debug0 = *(uint64_t *) soft->debug_addr;
 
-       return sprintf(buf, "0x%lx 0x%lx\n",
-                      (debug0 >> 32), (debug0 & 0xffffffff));
+       return sprintf(buf, "0x%x 0x%x\n",
+                      upper_32_bits(debug0), lower_32_bits(debug0));
 }
 
 static ssize_t store_algo(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)