kernel/linux.git/drivers/net/wireless/ath, branch v3.4.37

ath9k_hw: improve reset reliability after errors

2013-03-14T18:29:43+00:00

commit 3412f2f086ea7531378fabe756bd4a1109994ae6 upstream. On many different chips, important aspects of the MAC state are not fully cleared by a warm reset. This can show up as tx/rx hangs, those annoying "DMA failed to stop in 10 ms..." messages or other quirks. On AR933x, the chip can occasionally get stuck in a way that only a driver unload/reload or a reboot would bring it back to life. With this patch, a full reset is issued when bringing the chip out of FULL-SLEEP state (after idle), or if either Rx or Tx was not shut down properly. This makes the DMA related error messages disappear completely in my tests on AR933x, and the chip does not get stuck anymore. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k: fix RSSI dummy marker value

2013-03-14T18:29:43+00:00

commit a3d63cadbad97671d740a9698acc2c95d1ca6e79 upstream. RSSI is being stored internally as s8 in several places. The indication of an unset RSSI value, ATH_RSSI_DUMMY_MARKER, was supposed to have been set to 127, but ended up being set to 0x127 because of a code cleanup mistake. This could lead to invalid signal strength values in a few places. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k_hw: fix calibration issues on chainmask that don't include chain 0

2013-03-03T22:06:43+00:00

commit 4a8f199508d79ff8a7d1e22f47b912baaf225336 upstream. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: CAI Qian Reviewed-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k: fix double-free bug on beacon generate failure

2013-02-04T00:24:41+00:00

commit 1adb2e2b5f85023d17eb4f95386a57029df27c88 upstream. When the next beacon is sent, the ath_buf from the previous run is reused. If getting a new beacon from mac80211 fails, bf->bf_mpdu is not reset, yet the skb is freed, leading to a double-free on the next beacon tx attempt, resulting in a system crash. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k: do not link receive buffers during flush

2013-02-04T00:24:41+00:00

commit a3dc48e82bb146ef11cf75676c8410c1df29b0c4 upstream. On AR9300 the rx FIFO needs to be empty during reset to ensure that no further DMA activity is generated, otherwise it might lead to memory corruption issues. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k_htc: Fix memory leak

2013-02-04T00:24:41+00:00

commit 0981c3b24ef664f5611008a6e6d0622fac6d892b upstream. SKBs that are allocated in the HTC layer do not have callbacks registered and hence ended up not being freed, Fix this by freeing them properly in the TX completion routine. Reported-by: Larry Finger Signed-off-by: Sujith Manoharan Tested-by: Larry Finger Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k_hw: Fix signal strength / channel noise reporting

2013-01-17T16:50:43+00:00

commit b7c0c238898d200e80487516e2b67aba2a522cc0 upstream. While AR_PHY_CCA_NOM_VAL_* does contain the expected internal noise floor for a chip measured in clean air, it refers to the lowest expected reading. Depending on the frequency, this measurement can vary by about 6db, thus causing a higher reported channel noise and signal strength. Factor in the 6db offset when converting internal noisefloor to channel noise. This patch makes the reported values more accurate for all chips without affecting NF calibration behavior. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath9k: ar9003: fix OTP register offsets for AR9340

2013-01-17T16:50:43+00:00

commit b3cd8021379306c0be6932e4d3b4b01efc681769 upstream. Trying to access the OTP memory on the AR9340 causes a data bus error like this: Data bus error, epc == 86e84164, ra == 86e84164 Oops[#1]: Cpu 0 $ 0 : 00000000 00000061 deadc0de 00000000 $ 4 : b8115f18 00015f18 00000007 00000004 $ 8 : 00000001 7c7c3c7c 7c7c7c7c 7c7c7c7c $12 : 7c7c3c7c 001f0041 00000000 7c7c7c3c $16 : 86ee0000 00015f18 00000000 00000007 $20 : 00000004 00000064 00000004 86d71c44 $24 : 00000000 86e6ca00 $28 : 86d70000 86d71b20 86ece0c0 86e84164 Hi : 00000000 Lo : 00000064 epc : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw] Tainted: G O ra : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw] Status: 1100d403 KERNEL EXL IE Cause : 4080801c PrId : 0001974c (MIPS 74Kc) Modules linked in: ath9k(O+) ath9k_common(O) ath9k_hw(O) ath(O) ar934x_nfc mac80211(O) usbcore usb_common scsi_mod nls_base nand nand_ecc nand_ids crc_ccitt cfg80211(O) compat(O) arc4 aes_generic crypto_blkcipher cryptomgr aead crypto_hash crypto_algapi ledtrig_timer ledtrig_default_on leds_gpio Process insmod (pid: 459, threadinfo=86d70000, task=87942140, tls=779ac440) Stack : 802fb500 000200da 804db150 804e0000 87816130 86ee0000 00010000 86d71b88 86d71bc0 00000004 00000003 86e9fcd0 80305300 0002c0d0 86e74c50 800b4c20 000003e8 00000001 00000000 86ee0000 000003ff 86e9fd64 80305300 80123938 fffffffc 00000004 000058bc 00000000 86ea0000 86ee0000 000001ff 878d6000 99999999 86e9fdc0 86ee0fcc 86e9e664 0000c0d0 86ee0000 0000700000007000 ... Call Trace: [<86e84164>] ath9k_hw_wait+0x58/0xb0 [ath9k_hw] [<86e9fcd0>] ath9k_hw_setup_statusring+0x16b8/0x1c7c [ath9k_hw] Code: 0000a812 0040f809 00000000 <00531024> 1054000b 24020001 0c05b5dc 2404000a 26520001 The cause of the error is that the OTP register offsets are different on the AR9340 than the actually used values. Signed-off-by: Gabor Juhos Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

Revert "ath9k_hw: Update AR9003 high_power tx gain table"

2013-01-17T16:50:43+00:00

commit 9c170e068636deb3e3f96114034bb711675f0faa upstream. This reverts commit f74b9d365ddd33a375802b064f96a5d0e99af7c0. Turns out reverting commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd "ath9k_hw: Updated AR9003 tx gain table for 5GHz" was not enough to bring the tx power back to normal levels on devices like the Buffalo WZR-HP-G450H, this one needs to be reverted as well. This revert improves tx power by ~10 db on that device Signed-off-by: Felix Fietkau Cc: rmanohar@qca.qualcomm.com Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

ath5k: fix tx path skb leaks

2013-01-17T16:50:41+00:00

commit 596ab5ec3bf10a22be30d7cb1d903a4b83fd607c upstream. ieee80211_free_txskb() needs to be used instead of dev_kfree_skb_any for tx packets passed to the driver from mac80211 Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman