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HID: roccat: Fix an error message when reading more data from bin attributes

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Using cat or something to read from binary attributes would try to do an
additional read with offset equal to filesize. This resulted in an invalid
attribute error. This is fixed by giving the right answer instead of EINVAL.

Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Stefan Achatz 2011-01-06 09:00:41 +01:00 committed by Jiri Kosina
parent e68cc603b0
commit fd82be6c0a
1 changed files with 3 additions and 0 deletions
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drivers/hid/hid-roccat-koneplus.c
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@ -258,6 +258,9 @@ static ssize_t koneplus_sysfs_read(struct file *fp, struct kobject *kobj,
struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
int retval;
if (off >= real_size)
return 0;
if (off != 0 || count != real_size)
return -EINVAL;