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HID: Do not discard truncated input reports 

Truncated reports should not be discarded since it prevents buggy
devices from communicating with userspace.

Prior to the regession introduced in 2.6.20, a shorter-than-expected
report in hid_input_report() was passed thru after having the missing
bytes cleared. This behavior was established over a few patches in the
2.6.early-teens days, including commit
cd6104572b.

This patch restores the previous behavior and fixes the regression.

Signed-off-by: Adam Kropelin <akropel1@rochester.rr.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Adam Kropelin 2007-04-05 16:06:30 +02:00 committed by Jiri Kosina
parent e0f2e3a06b
commit 8da7d1bae5
1 changed files with 1 additions and 1 deletions
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2
drivers/hid/hid-core.c
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@ -969,7 +969,7 @@ int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int i
if (size < rsize) {
dbg("report %d is too short, (%d < %d)", report->id, size, rsize);
return -1;
memset(data + size, 0, rsize - size);
}
if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)