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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:31:12 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 19:31:12 +0200 |
| commit | 3e370b29d35fb01bfb92c2814d6f79bf6a2cb970 (patch) | |
| tree | 3b8fb467d60bfe6a34686f4abdc3a60050ba40a4 /drivers/sbus/char/jsflash.c | |
| parent | 88d1dce3a74367291f65a757fbdcaf17f042f30c (diff) | |
| parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
Merge branch 'linus' into x86/pci-ioapic-boot-irq-quirks
Conflicts:
drivers/pci/quirks.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/sbus/char/jsflash.c')
| -rw-r--r-- | drivers/sbus/char/jsflash.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/sbus/char/jsflash.c b/drivers/sbus/char/jsflash.c index 4b7079fdc10..2bec9ccc029 100644 --- a/drivers/sbus/char/jsflash.c +++ b/drivers/sbus/char/jsflash.c @@ -27,6 +27,7 @@ */ #include <linux/module.h> +#include <linux/smp_lock.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/miscdevice.h> @@ -417,11 +418,17 @@ static int jsf_mmap(struct file * file, struct vm_area_struct * vma) static int jsf_open(struct inode * inode, struct file * filp) { - - if (jsf0.base == 0) return -ENXIO; - if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) + lock_kernel(); + if (jsf0.base == 0) { + unlock_kernel(); + return -ENXIO; + } + if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) { + unlock_kernel(); return -EBUSY; + } + unlock_kernel(); return 0; /* XXX What security? */ } |