diff options
author | Hemant Kumar <hemantk@codeaurora.org> | 2012-10-25 20:17:54 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-10-26 09:43:15 +0200 |
commit | 39707c2a3ba5011038b363f84d37c8a98d2d9db1 (patch) | |
tree | f1d0eea410e1da545fcc7230386810ed7969787b /drivers/net/usb/cdc_ether.c | |
parent | net/mlx4_core: Unmap UAR also in the case of error flow (diff) | |
download | linux-39707c2a3ba5011038b363f84d37c8a98d2d9db1.tar.xz linux-39707c2a3ba5011038b363f84d37c8a98d2d9db1.zip |
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>
Diffstat (limited to 'drivers/net/usb/cdc_ether.c')
0 files changed, 0 insertions, 0 deletions