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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:16:51 +0200
committerJonathan Corbet <corbet@lwn.net>2008-07-02 15:06:25 -0600
commit25368ca579905efe7f7dda43c252eb7b371de98c (patch)
tree084b749627c5087456b26bcb85b48017f5dbf38c /drivers/char/tpm
parent09de36137c3794786bc75682c0e1ce45182c1772 (diff)
downloadlinux-25368ca579905efe7f7dda43c252eb7b371de98c.tar.gz
tpm-tpm: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char/tpm')
-rw-r--r--drivers/char/tpm/tpm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index a5d8bcb4000..e1fc193d939 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -26,6 +26,7 @@
#include <linux/poll.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
#include "tpm.h"
@@ -897,6 +898,7 @@ int tpm_open(struct inode *inode, struct file *file)
int rc = 0, minor = iminor(inode);
struct tpm_chip *chip = NULL, *pos;
+ lock_kernel();
spin_lock(&driver_lock);
list_for_each_entry(pos, &tpm_chip_list, list) {
@@ -926,16 +928,19 @@ int tpm_open(struct inode *inode, struct file *file)
if (chip->data_buffer == NULL) {
chip->num_opens--;
put_device(chip->dev);
+ unlock_kernel();
return -ENOMEM;
}
atomic_set(&chip->data_pending, 0);
file->private_data = chip;
+ unlock_kernel();
return 0;
err_out:
spin_unlock(&driver_lock);
+ unlock_kernel();
return rc;
}
EXPORT_SYMBOL_GPL(tpm_open);