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| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-16 13:57:31 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 14:05:51 -0600 |
| commit | 65f37b790bd7ba15413838579470296a709c45e6 (patch) | |
| tree | f6ce51d05304810cc96bc1820fadf371da5b9d8b /drivers/char/dsp56k.c | |
| parent | c0bed680f0ca603864375ed5f9fed4296a53aa62 (diff) | |
| download | linux-65f37b790bd7ba15413838579470296a709c45e6.tar.gz linux-65f37b790bd7ba15413838579470296a709c45e6.tar.bz2 linux-65f37b790bd7ba15413838579470296a709c45e6.zip | |
dsp56k: BKL pushdown
Put explicit lock_kernel calls into dsp56k_open().
[Stupid missing label error fixed]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/char/dsp56k.c')
| -rw-r--r-- | drivers/char/dsp56k.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c index a69c65283260..7bf7485377e6 100644 --- a/drivers/char/dsp56k.c +++ b/drivers/char/dsp56k.c @@ -33,6 +33,7 @@ #include <linux/mm.h> #include <linux/init.h> #include <linux/device.h> +#include <linux/smp_lock.h> #include <asm/atarihw.h> #include <asm/traps.h> @@ -436,13 +437,17 @@ static unsigned int dsp56k_poll(struct file *file, poll_table *wait) static int dsp56k_open(struct inode *inode, struct file *file) { int dev = iminor(inode) & 0x0f; + int ret = 0; + lock_kernel(); switch(dev) { case DSP56K_DEV_56001: - if (test_and_set_bit(0, &dsp56k.in_use)) - return -EBUSY; + if (test_and_set_bit(0, &dsp56k.in_use)) { + ret = -EBUSY; + goto out; + } dsp56k.timeout = TIMEOUT; dsp56k.maxio = MAXIO; @@ -458,10 +463,11 @@ static int dsp56k_open(struct inode *inode, struct file *file) break; default: - return -ENODEV; + ret = -ENODEV; } - - return 0; +out: + unlock_kernel(); + return ret; } static int dsp56k_release(struct inode *inode, struct file *file) |