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17 May 2024, 09:02:56 UTC
Revision 39707c2a3ba5011038b363f84d37c8a98d2d9db1 authored by Hemant Kumar on 25 October 2012, 18:17:54 UTC, committed by David S. Miller on 26 October 2012, 07:43:15 UTC 
net: usb: Fix memory leak on Tx data path
 
Driver anchors the tx urbs and defers the urb submission if
a transmit request comes when the interface is suspended.
Anchoring urb increments the urb reference count. These
deferred urbs are later accessed by calling usb_get_from_anchor()
for submission during interface resume. usb_get_from_anchor()
unanchors the urb but urb reference count remains same.
This causes the urb reference count to remain non-zero
after usb_free_urb() gets called and urb never gets freed.
Hence call usb_put_urb() after anchoring the urb to properly
balance the reference count for these deferred urbs. Also,
unanchor these deferred urbs during disconnect, to free them
up.

Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent bfc0d8c
History
Tip revision: 39707c2a3ba5011038b363f84d37c8a98d2d9db1 authored by Hemant Kumar on 25 October 2012, 18:17:54 UTC
net: usb: Fix memory leak on Tx data path
Tip revision: 39707c2
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