pcmcia: cdev lock_kernel() pushdown

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/drivers/pcmcia/pcmcia_ioctl.c b/drivers/pcmcia/pcmcia_ioctl.c
index 5f186ab..138396e 100644 (file)
--- a/drivers/pcmcia/pcmcia_ioctl.c
+++ b/drivers/pcmcia/pcmcia_ioctl.c
@@ -27,6 +27,7 @@
 #include <linux/proc_fs.h>
 #include <linux/poll.h>
 #include <linux/pci.h>
+#include <linux/smp_lock.h>
 #include <linux/workqueue.h>
 
 #define IN_CARD_SERVICES
@@ -397,20 +398,27 @@ static int ds_open(struct inode *inode, struct file *file)
     struct pcmcia_socket *s;
     user_info_t *user;
     static int warning_printed = 0;
+    int ret = 0;
 
     ds_dbg(0, "ds_open(socket %d)\n", i);
 
+    lock_kernel();
     s = pcmcia_get_socket_by_nr(i);
-    if (!s)
-           return -ENODEV;
+    if (!s) {
+           ret = -ENODEV;
+           goto out;
+    }
     s = pcmcia_get_socket(s);
-    if (!s)
-           return -ENODEV;
+    if (!s) {
+           ret = -ENODEV;
+           goto out;
+    }
 
     if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
            if (s->pcmcia_state.busy) {
                    pcmcia_put_socket(s);
-                   return -EBUSY;
+                   ret = -EBUSY;
+                   goto out;
            }
        else
            s->pcmcia_state.busy = 1;
@@ -419,7 +427,8 @@ static int ds_open(struct inode *inode, struct file *file)
     user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
     if (!user) {
            pcmcia_put_socket(s);
-           return -ENOMEM;
+           ret = -ENOMEM;
+           goto out;
     }
     user->event_tail = user->event_head = 0;
     user->next = s->user;
@@ -441,7 +450,9 @@ static int ds_open(struct inode *inode, struct file *file)
 
     if (s->pcmcia_state.present)
        queue_event(user, CS_EVENT_CARD_INSERTION);
-    return 0;
+out:
+    unlock_kernel();
+    return ret;
 } /* ds_open */
 
 /*====================================================================*/