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| author | Dmitry Torokhov <dtor_core@ameritech.net> | 2005-04-29 01:26:27 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-06-20 15:15:02 -0700 |
| commit | fc7e4828995d8c9e4c9597f8a19179e4ab53f73e (patch) | |
| tree | 0ca83b71052eb241acc64d0152bff21188944b9c /drivers/pci/pci-driver.c | |
| parent | 4a0c20bf8c0fe2116f8fd7d3da6122bf8a01f026 (diff) | |
| download | linux-rpi3-fc7e4828995d8c9e4c9597f8a19179e4ab53f73e.tar.gz linux-rpi3-fc7e4828995d8c9e4c9597f8a19179e4ab53f73e.tar.bz2 linux-rpi3-fc7e4828995d8c9e4c9597f8a19179e4ab53f73e.zip | |
[PATCH] sysfs: (driver/pci) if show/store is missing return -EIO
sysfs: fix drivers/pci so if an attribute does not implement
show or store method read/write will return -EIO
instead of 0.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/pci-driver.c')
| -rw-r--r-- | drivers/pci/pci-driver.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index cf2cff7480f1..e65bf2b395aa 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -335,13 +335,14 @@ pci_driver_attr_show(struct kobject * kobj, struct attribute *attr, char *buf) { struct device_driver *driver = kobj_to_pci_driver(kobj); struct driver_attribute *dattr = attr_to_driver_attribute(attr); - ssize_t ret = 0; + ssize_t ret; - if (get_driver(driver)) { - if (dattr->show) - ret = dattr->show(driver, buf); - put_driver(driver); - } + if (!get_driver(driver)) + return -ENODEV; + + ret = dattr->show ? dattr->show(driver, buf) : -EIO; + + put_driver(driver); return ret; } @@ -351,13 +352,14 @@ pci_driver_attr_store(struct kobject * kobj, struct attribute *attr, { struct device_driver *driver = kobj_to_pci_driver(kobj); struct driver_attribute *dattr = attr_to_driver_attribute(attr); - ssize_t ret = 0; + ssize_t ret; - if (get_driver(driver)) { - if (dattr->store) - ret = dattr->store(driver, buf, count); - put_driver(driver); - } + if (!get_driver(driver)) + return -ENODEV; + + ret = dattr->store ? dattr->store(driver, buf, count) : -EIO; + + put_driver(driver); return ret; } |