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| author | Diego Woitasen <diego@woitasen.com.ar> | 2007-11-21 15:07:08 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-01 15:04:21 -0800 |
| commit | 0741a951e8489ef2889d9e3eecf33bb29b779dd0 (patch) | |
| tree | 687ff8648146dcd4e1ea0da71b46eceb3cd19a22 /drivers/pci/syscall.c | |
| parent | 10d7425d201e866ee0c57424860e06118dae2500 (diff) | |
| download | lwn-0741a951e8489ef2889d9e3eecf33bb29b779dd0.tar.gz lwn-0741a951e8489ef2889d9e3eecf33bb29b779dd0.zip | |
PCI: remove unneeded lock_kernel() in drivers/pci/syscall.c.
sys_pciconfig_{read,write}() are protected against PCI removal with the
reference count in struct pci_dev. The concurrency of
pci_user_{read,write}_config_* functions are already protected by pci_lock
in drivers/pci/access.c.
Signed-off-by: Diego Woitasen <diego@woitasen.com.ar>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/syscall.c')
| -rw-r--r-- | drivers/pci/syscall.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/pci/syscall.c b/drivers/pci/syscall.c index 2ac050d7f8cf..645d7a60e412 100644 --- a/drivers/pci/syscall.c +++ b/drivers/pci/syscall.c @@ -34,7 +34,6 @@ sys_pciconfig_read(unsigned long bus, unsigned long dfn, if (!dev) goto error; - lock_kernel(); switch (len) { case 1: cfg_ret = pci_user_read_config_byte(dev, off, &byte); @@ -47,10 +46,8 @@ sys_pciconfig_read(unsigned long bus, unsigned long dfn, break; default: err = -EINVAL; - unlock_kernel(); goto error; }; - unlock_kernel(); err = -EIO; if (cfg_ret != PCIBIOS_SUCCESSFUL) @@ -107,7 +104,6 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn, if (!dev) return -ENODEV; - lock_kernel(); switch(len) { case 1: err = get_user(byte, (u8 __user *)buf); @@ -140,7 +136,6 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn, err = -EINVAL; break; } - unlock_kernel(); pci_dev_put(dev); return err; } |