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Diffstat (limited to 'drivers/sbus/char/flash.c')
| -rw-r--r-- | drivers/sbus/char/flash.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c index 44e039865aa..7d95e151513 100644 --- a/drivers/sbus/char/flash.c +++ b/drivers/sbus/char/flash.c @@ -127,9 +127,13 @@ flash_read(struct file * file, char __user * buf, static int flash_open(struct inode *inode, struct file *file) { - if (test_and_set_bit(0, (void *)&flash.busy) != 0) + lock_kernel(); + if (test_and_set_bit(0, (void *)&flash.busy) != 0) { + unlock_kernel(); return -EBUSY; + } + unlock_kernel(); return 0; } |