Messages in this thread Patch in this message | | | From | Dmitry Torokhov <> | Subject | [RFC/PATCH 3/5] sysfs: (driver/pci) if show/store is missing return -ENOSYS | Date | Thu, 28 Apr 2005 00:42:19 -0500 |
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sysfs: fix drivers/pci so if an attribute does not implement show or store method read/write will return -ENOSYS instead of 0.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru> ---
hotplug/pci_hotplug_core.c | 4 ++-- hotplug/rpadlpar_sysfs.c | 2 +- pci-driver.c | 26 ++++++++++++++------------ 3 files changed, 17 insertions(+), 15 deletions(-)
Index: dtor/drivers/pci/hotplug/rpadlpar_sysfs.c =================================================================== --- dtor.orig/drivers/pci/hotplug/rpadlpar_sysfs.c +++ dtor/drivers/pci/hotplug/rpadlpar_sysfs.c @@ -48,7 +48,7 @@ dlpar_attr_store(struct kobject * kobj, struct dlpar_io_attr *dlpar_attr = container_of(attr, struct dlpar_io_attr, attr); return dlpar_attr->store ? - dlpar_attr->store(dlpar_attr, buf, nbytes) : 0; + dlpar_attr->store(dlpar_attr, buf, nbytes) : -ENOSYS; } static struct sysfs_ops dlpar_attr_sysfs_ops = { Index: dtor/drivers/pci/pci-driver.c =================================================================== --- dtor.orig/drivers/pci/pci-driver.c +++ dtor/drivers/pci/pci-driver.c @@ -327,13 +327,14 @@ pci_driver_attr_show(struct kobject * ko { 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) : -ENOSYS; + + put_driver(driver); return ret; } @@ -343,13 +344,14 @@ pci_driver_attr_store(struct kobject * k { 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) : -ENOSYS; + + put_driver(driver); return ret; } Index: dtor/drivers/pci/hotplug/pci_hotplug_core.c =================================================================== --- dtor.orig/drivers/pci/hotplug/pci_hotplug_core.c +++ dtor/drivers/pci/hotplug/pci_hotplug_core.c @@ -73,7 +73,7 @@ static ssize_t hotplug_slot_attr_show(st { struct hotplug_slot *slot = to_hotplug_slot(kobj); struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); - return attribute->show ? attribute->show(slot, buf) : 0; + return attribute->show ? attribute->show(slot, buf) : -ENOSYS; } static ssize_t hotplug_slot_attr_store(struct kobject *kobj, @@ -81,7 +81,7 @@ static ssize_t hotplug_slot_attr_store(s { struct hotplug_slot *slot = to_hotplug_slot(kobj); struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); - return attribute->store ? attribute->store(slot, buf, len) : 0; + return attribute->store ? attribute->store(slot, buf, len) : -ENOSYS; } static struct sysfs_ops hotplug_slot_sysfs_ops = { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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