diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-15 19:25:03 +0400 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-05-19 01:43:40 +0400 |
| commit | 0bec0bba7a507bdaf07312fcabdc00b5576abb32 (patch) | |
| tree | 5ed654b439d0950e2fce87efe4cf97dc08394814 | |
| parent | 0911810755fc9f15659cc3cb43912633b90027a0 (diff) | |
| download | linux-0bec0bba7a507bdaf07312fcabdc00b5576abb32.tar.xz | |
pcmcia: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | drivers/pcmcia/pcmcia_ioctl.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/pcmcia/pcmcia_ioctl.c b/drivers/pcmcia/pcmcia_ioctl.c index 5f186abca108..138396ef5be9 100644 --- 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 */ /*====================================================================*/ |