generic: ar8216: add missing locking calls

Fixes the following lockdep warning:

[   19.160000] ------------[ cut here ]------------
[   19.160000] WARNING: at drivers/net/phy/ar8216.c:322 ar8216_rmw+0x54/0xa4()
[   19.170000] Modules linked in: nf_defrag_ipv4 nf_conntrack ehci_hcd
sd_mod pppox ipt_REJECT xt_TCPMSS ipt_LOG xt_comment xt_multip
ort xt_mac xt_limit iptable_mangle iptable_filter ip_tables xt_tcpudp
x_tables ppp_async ppp_generic slhc ath9k(O) ath9k_common(O) at
h9k_hw(O) ath(O) mac80211(O) usbcore usb_common scsi_mod nls_base crc7
crc_itu_t crc_ccitt cfg80211(O) compat(O) arc4 aes_generic cry
pto_blkcipher cryptomgr aead crypto_hash crypto_algapi ledtrig_timer
ledtrig_default_on leds_gpio gpio_button_hotplug(O)
[   19.210000] Call Trace:
[   19.220000] [<8028dc38>] dump_stack+0x8/0x34
[   19.220000] [<80072da0>] warn_slowpath_common+0x78/0xa4
[   19.230000] [<80072de4>] warn_slowpath_null+0x18/0x24
[   19.230000] [<801de820>] ar8216_rmw+0x54/0xa4
[   19.240000] [<801df460>] ar8216_mib_capture+0x70/0xd0
[   19.240000] [<801df944>] ar8xxx_mib_work_func+0x34/0x98
[   19.250000] [<80089a7c>] process_one_work+0x28c/0x460
[   19.250000] [<8008a630>] worker_thread+0x22c/0x334
[   19.260000] [<8008e544>] kthread+0x88/0x90
[   19.260000] [<80065020>] kernel_thread_helper+0x10/0x18
[   19.270000]
[   19.270000] ---[ end trace 22e9d696adfa6a08 ]---

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34281 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: remove an unblanced mutex_unlock call

Fixes the following warning:

[   94.080000]
[   94.080000] =====================================
[   94.080000] [ BUG: bad unlock balance detected! ]
[   94.080000] 3.3.8 #2 Tainted: G           O
[   94.080000] -------------------------------------
[   94.080000] swconfig/1220 is trying to release lock (&priv->mib_lock) at:
[   94.080000] [<801df8f4>] ar8216_sw_get_port_mib+0x138/0x16c
[   94.080000] but there are no more locks to release!
[   94.080000]
[   94.080000] other info that might help us debug this:
[   94.080000] 2 locks held by swconfig/1220:
[   94.080000]  #0:  (genl_mutex){+.+...}, at: [<80222430>] genl_rcv+0x14/0x34
[   94.080000]  #1:  (&dev->sw_mutex){+.+...}, at: [<801da018>] swconfig_get_dev+0x88/0xb4
[   94.080000]
[   94.080000] stack backtrace:
[   94.080000] Call Trace:
[   94.080000] [<8028dc58>] dump_stack+0x8/0x34
[   94.080000] [<800a5128>] print_unlock_inbalance_bug+0xe0/0xfc
[   94.080000] [<800a82c0>] lock_release+0x18c/0x1c8
[   94.080000] [<80292074>] __mutex_unlock_slowpath+0xd8/0x17c
[   94.080000] [<801df8f4>] ar8216_sw_get_port_mib+0x138/0x16c
[   94.080000] [<801db688>] swconfig_get_attr+0xbc/0x394
[   94.080000] [<8022261c>] genl_rcv_msg+0x1cc/0x214
[   94.080000] [<80221a18>] netlink_rcv_skb+0x6c/0xe8
[   94.080000] [<80222440>] genl_rcv+0x24/0x34
[   94.080000] [<80221370>] netlink_unicast+0x15c/0x22c
[   94.080000] [<8022175c>] netlink_sendmsg+0x240/0x2d0
[   94.080000] [<801ef544>] sock_sendmsg+0x84/0x9c
[   94.080000] [<801f0648>] __sys_sendmsg+0x1cc/0x270
[   94.080000] [<801f207c>] sys_sendmsg+0x48/0x7c
[   94.080000] [<8006ad78>] stack_done+0x20/0x40
[   94.080000]

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34282 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: fix port number check in 'ar8xxx_mib_work_func'

Also add a WARN_ON to 'ar8216_mib_fetch_port_stat'

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34283 3c298f89-4303-0410-b956-a3cf2f4a3e73