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usb: wusbcore: adjust iterator correctly when searching for ep comp descriptor 

If the endpoint companion descriptor is not the first descriptor in the
extra descriptor buffer of a usb_host_endpoint, the loop in
rpipe_epc_find will get its buffer pointer and remaining size values out
of sync.  The buffer ptr 'itr' is advanced by the descriptor's bLength
field but the remaining size value 'itr_size' is decremented by the
bDescriptorType field which is incorrect.  This patch fixes the loop to
decrement itr_size by bLength as it should.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Pugliese 2014-02-28 15:15:19 -06:00 committed by Greg Kroah-Hartman
parent e500d526f9
commit 4659a2452b
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/wusbcore/wa-rpipe.c
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@ -298,7 +298,7 @@ static struct usb_wireless_ep_comp_descriptor *rpipe_epc_find(
break;
}
itr += hdr->bLength;
itr_size -= hdr->bDescriptorType;
itr_size -= hdr->bLength;
}
out:
return epcd;