[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: NDmitry Torokhov <dtor@mail.ru> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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