linux-stable.git/drivers/net, branch v3.0.38

e1000e: Correct link check logic for 82571 serdes

2012-07-19T15:58:21+00:00

commit d0efa8f23a644f7cb7d1f8e78dd9a223efa412a3 upstream.

SYNCH bit and IV bit of RXCW register are sticky. Before examining these bits,
RXCW should be read twice to filter out one-time false events and have correct
values for these bits. Incorrect values of these bits in link check logic can
cause weird link stability issues if auto-negotiation fails.

Reported-by: Dean Nelson 
Signed-off-by: Tushar Dave 
Reviewed-by: Bruce Allan 
Tested-by: Jeff Pieper 
Signed-off-by: Jeff Kirsher 
Signed-off-by: Greg Kroah-Hartman

rt2x00usb: fix indexes ordering on RX queue kick

2012-07-19T15:58:21+00:00

commit efd821182cec8c92babef6e00a95066d3252fda4 upstream.

On rt2x00_dmastart() we increase index specified by Q_INDEX and on
rt2x00_dmadone() we increase index specified by Q_INDEX_DONE. So entries
between Q_INDEX_DONE and Q_INDEX are those we currently process in the
hardware. Entries between Q_INDEX and Q_INDEX_DONE are those we can
submit to the hardware.

According to that fix rt2x00usb_kick_queue(), as we need to submit RX
entries that are not processed by the hardware. It worked before only
for empty queue, otherwise was broken.

Note that for TX queues indexes ordering are ok. We need to kick entries
that have filled skb, but was not submitted to the hardware, i.e.
started from Q_INDEX_DONE and have ENTRY_DATA_PENDING bit set.

From practical standpoint this fixes RX queue stall, usually reproducible
in AP mode, like for example reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=828824

Reported-and-tested-by: Franco Miceli 
Reported-and-tested-by: Tom Horsley 
Signed-off-by: Stanislaw Gruszka 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

rtl8187: ->brightness_set can not sleep

2012-07-16T15:47:51+00:00

commit 0fde0a8cfd0ede7f310d6a681c8e5a7cb3e32406 upstream.

Fix:

BUG: sleeping function called from invalid context at kernel/workqueue.c:2547
in_atomic(): 1, irqs_disabled(): 0, pid: 629, name: wpa_supplicant
2 locks held by wpa_supplicant/629:
 #0:  (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x14/0x20
 #1:  (&trigger->leddev_list_lock){.+.?..}, at: [] led_trigger_event+0x21/0x80
Pid: 629, comm: wpa_supplicant Not tainted 3.3.0-0.rc3.git5.1.fc17.i686
Call Trace:
 [] __might_sleep+0x126/0x1d0
 [] wait_on_work+0x2c/0x1d0
 [] __cancel_work_timer+0x6a/0x120
 [] cancel_delayed_work_sync+0x10/0x20
 [] rtl8187_led_brightness_set+0x82/0xf0 [rtl8187]
 [] led_trigger_event+0x5c/0x80
 [] ieee80211_led_radio+0x1d/0x40 [mac80211]
 [] ieee80211_stop_device+0x13/0x230 [mac80211]

Removing _sync is ok, because if led_on work is currently running
it will be finished before led_off work start to perform, since
they are always queued on the same mac80211 local->workqueue.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=795176

Signed-off-by: Stanislaw Gruszka 
Acked-by: Larry Finger 
Acked-by: Hin-Tak Leung 
Signed-off-by: John W. Linville 
Cc: Josh Boyer 
Signed-off-by: Greg Kroah-Hartman

ipheth: add support for iPad

2012-07-16T15:47:50+00:00

commit 6de0298ec9c1edaf330b71b57346241ece8f3346 upstream.

This adds support for the iPad to the ipheth driver.
(product id = 0x129a)

Signed-off-by: Davide Gerhard 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

mwifiex: fix 11n rx packet drop issue

2012-07-16T15:47:49+00:00

commit 925839243dc9aa4ef25305f5afd10ed18258a4ac upstream.

Currently we check the sequence number of last packet received
against start_win. If a sequence hole is detected, start_win is
updated to next sequence number.

Since the rx sequence number is initialized to 0, a corner case
exists when BA setup happens immediately after association. As
0 is a valid sequence number, start_win gets increased to 1
incorrectly. This causes the first packet with sequence number 0
being dropped.

Initialize rx sequence number as 0xffff and skip adjusting
start_win if the sequence number remains 0xffff. The sequence
number will be updated once the first packet is received.

Signed-off-by: Stone Piao 
Signed-off-by: Avinash Patil 
Signed-off-by: Kiran Divekar 
Signed-off-by: Bing Zhao 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

can: c_can: precedence error in c_can_chip_config()

2012-07-16T15:47:48+00:00

commit d9cb9bd63eb27ac19f26a8547128c053f43a5da8 upstream.

(CAN_CTRLMODE_LISTENONLY & CAN_CTRLMODE_LOOPBACK) is (0x02 & 0x01) which
is zero so the condition is never true.  The intent here was to test
that both flags were set.

Signed-off-by: Dan Carpenter 
Acked-by: Oliver Hartkopp 
Signed-off-by: Marc Kleine-Budde 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

ath9k: enable serialize_regmode for non-PCIE AR9287

2012-07-16T15:47:39+00:00

commit 7508b657967cf664b5aa0f6367d05016e7e3bc2a upstream.

https://bugzilla.kernel.org/show_bug.cgi?id=42903

Based on the work of 

Signed-off-by: Panayiotis Karabassis 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

ath9k_hw: avoid possible infinite loop in ar9003_get_pll_sqsum_dvc

2012-07-16T15:47:39+00:00

commit f18e3c6b67f448ec47b3a5b242789bd3d5644879 upstream.

"ath9k: Fix softlockup in AR9485" with commit id
64bc1239c790e051ff677e023435d770d2ffa174 fixed the reported
issue, yet its better to avoid the possible infinite loop
in ar9003_get_pll_sqsum_dvc by having a timeout as suggested
by ath9k maintainers.
http://www.spinics.net/lists/linux-wireless/msg92126.html.
Based on my testing PLL's locking measurement is done in
~200us (2 iterations).

Cc: Rolf Offermanns 
Cc: Sujith Manoharan 
Cc: Senthil Balasubramanian 
Signed-off-by: Mohammed Shafi Shajakhan 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

ath9k: Fix softlockup in AR9485

2012-07-16T15:47:38+00:00

commit bcb7ad7bcbef030e6ba71ede1f9866368aca7c99 upstream.

steps to recreate:
load latest ath9k driver with AR9485
stop the network-manager and wpa_supplicant
bring the interface up

	Call Trace:
	[] ? ath_hw_check+0xe0/0xe0 [ath9k]
	[] __const_udelay+0x28/0x30
	[] ar9003_get_pll_sqsum_dvc+0x4a/0x80 [ath9k_hw]
	[] ath_hw_pll_work+0x5b/0xe0 [ath9k]
	[] process_one_work+0x11e/0x470
	[] worker_thread+0x15f/0x360
	[] ? manage_workers+0x230/0x230
	[] kthread+0x93/0xa0
	[] kernel_thread_helper+0x4/0x10
	[] ? kthread_freezable_should_stop+0x70/0x70
	[] ? gs_change+0x13/0x13

ensure that the PLL-WAR for AR9485/AR9340 is executed only if the STA is
associated (or) IBSS/AP mode had started beaconing. Ideally this WAR
is needed to recover from some rare beacon stuck during stress testing.
Before the STA is associated/IBSS had started beaconing, PLL4(0x1618c)
always seem to have zero even though we had configured PLL3(0x16188) to
query about PLL's locking status. When we keep on polling infinitely PLL4's
8th bit(ie check for PLL locking measurements is done), machine hangs
due to softlockup.

fixes https://bugzilla.redhat.com/show_bug.cgi?id=811142

Reported-by: Rolf Offermanns 
Tested-by: Mohammed Shafi Shajakhan 
Signed-off-by: Mohammed Shafi Shajakhan 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

be2net: fix a race in be_xmit()

2012-07-16T15:47:37+00:00

[ Upstream commit cd8f76c0a0c6fce0b2cf23c9bd0123f91453f46d ]

As soon as hardware is notified of a transmit, we no longer can assume
skb can be dereferenced, as TX completion might have freed the packet.

Signed-off-by: Eric Dumazet 
Cc: Sathya Perla 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman