Thanks for the quick reply Pavel! I've seen this Oops with kernel 2.6.31.6, as well as with the latest linux-wireless that I downloaded on the 18th of november. Also, it's interesting that the card is identified as having a AR9280 chipset, the website for the card (http://www.ubnt.com/products/sr7112.php) says the card has an AR9220 chipset. Could this be causing the problem? I'm going to repost this to the ath9k mailing list you mentioned. Thanks again, Woody > -----Original Message----- > From: Pavel Roskin [mailto:proski@xxxxxxx] > Sent: Thursday, November 19, 2009 10:25 PM > To: Douglass, Woodrow > Cc: linux-wireless@xxxxxxxxxxxxxxx > Subject: Re: Kernel oops in ath9k > > On Thu, 2009-11-19 at 09:54 -0500, Douglass, Woodrow wrote: > > Hi all, > > > > I'm not sure if this is the right place to post this, but I > may have a > > bug report for the ath9k driver. > > You may want to post to ath9k-devel@xxxxxxxxxxxxxxx, as the > problem seems to be specific to the Atheros driver. > > > I'm running a single board computer with a 600Mhz celeron > processor. > > On the minipci bus I have a Ubiquiti SR71-12 802.11n card. > > It would be helpful if you also specified the exact version > of the kernel. > > > Also attached is > > a shell script with the commands I run to cause the oops. Note that > > the first time the ifconfig line in this script is run, a > "SIOCSIFFLAGS: > > Input/Output Error" is triggered, the kernel oops happens about 5 > > seconds after the ifconfig line is run a second time. > > I can reproduce "Input/Output Error" with SR71-12, but not > the oops with the current linux-wireless. > > I know that it's caused by returning false in this code in > file drivers/net/wireless/ath/ath9k/calib.c, function > ath9k_hw_init_cal(): > > /* Poll for offset calibration complete */ > if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, > AR_PHY_AGC_CONTROL_CAL, > 0, AH_WAIT_TIMEOUT)) { > ath_print(common, ATH_DBG_CALIBRATE, > "offset calibration failed to " > "complete in 1ms; noisy > environment?\n"); > return false; > } > > With full debugging (modprobe ath9k debug=0xffffffff), the > kernel messages are (with some context): > > ath: Reset TXQ, inactive queue: 7 > ath: Reset TX queue: 8 > ath: tx ok 0x0 err 0x0 desc 0x10f eol 0x10f urn 0x0 > ath: Reset TX queue: 9 > ath: tx ok 0x0 err 0x0 desc 0x10f eol 0x10f urn 0x0 > ath: ah->misc_mode 0x4 > ath: timeout (100000 us) on reg 0x9860: 0xdeadbeef & > 0x00000001 != 0x00000000 > ath: offset calibration failed to complete in 1ms; noisy environment? > ath: Unable to reset hardware; reset status -5 (freq 2412 MHz) > > I have access to various Ubiquiti cards, but SR71-12 is the > only one that fails. I know that it works in Windows XP with > the Ubiquiti driver for other SR71 cards (the inf file should > be tweaked to recognize the revision of SR71-12). That makes > me think the problem is not in the hardware and not in the > noisy environment. > > ath9k identifies the card as: > > phy0: Atheros AR9280 Rev:2 mem=0xffffc90010da0000, irq=18 > > # lspci -vnn -s 03:01.0 > 03:01.0 Network controller [0280]: Atheros Communications > Inc. AR922X Wireless Network Adapter [168c:0029] (rev 01) > Subsystem: Device [0777:4002] > Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 18 > Memory at fe3f0000 (32-bit, non-prefetchable) [size=64K] > Capabilities: [44] Power Management version 2 > Kernel driver in use: ath9k > Kernel modules: ath9k > > -- > Regards, > Pavel Roskin > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
