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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 15:44:51 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 15:44:51 +1000 |
| commit | 43d2548bb2ef7e6d753f91468a746784041e522d (patch) | |
| tree | 77d13fcd48fd998393abb825ec36e2b732684a73 /drivers/char/dsp56k.c | |
| parent | 585583d95c5660973bc0cf64add517b040acd8a4 (diff) | |
| parent | 85082fd7cbe3173198aac0eb5e85ab1edcc6352c (diff) | |
| download | op-kernel-dev-43d2548bb2ef7e6d753f91468a746784041e522d.zip op-kernel-dev-43d2548bb2ef7e6d753f91468a746784041e522d.tar.gz | |
Merge commit '85082fd7cbe3173198aac0eb5e85ab1edcc6352c' into test-build
Manual fixup of:
arch/powerpc/Kconfig
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 a69c652..7bf7485 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) |
