Date: Sun, 24 Jun 2012 04:17:21 GMT From: Adrian Chadd <adrian@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/169362: [ath] AR5416: radar pulse PHY errors sometimes include the CRC Error bit set as well as the PHY errors Message-ID: <201206240417.q5O4HLJo022776@red.freebsd.org> Resent-Message-ID: <201206240420.q5O4KA1V023463@freefall.freebsd.org>
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>Number: 169362 >Category: misc >Synopsis: [ath] AR5416: radar pulse PHY errors sometimes include the CRC Error bit set as well as the PHY errors >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jun 24 04:20:10 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Adrian Chadd >Release: 9.0-STABLE i386, with -HEAD net80211/ath >Organization: >Environment: >Description: Under repetitive pulse generation (from a USRP N200), the AR5416 starts generating PHY errors with the CRC error bit set. Here's an example RX descriptor dump with the error. The payload still contains the pulse length; it's just the "CRC" bit that's throwing things off. Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6ca60 DS.P:0x205a60) L:00205ac0 D:2e4f3800 ! Jun 23 21:02:24 marilyn kernel: 2a9bea20 00000800 00323431 00000001 Jun 23 21:02:24 marilyn kernel: 566a76ed 00000100 3722211f 80808080 80808080 80808080 00000515 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cac0 DS.P:0x205ac0) L:00205b20 D:14ea1800 Jun 23 21:02:24 marilyn kernel: 2a9bea20 00000800 00000000 00000000 Jun 23 21:02:24 marilyn kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cac0 DS.P:0x205ac0) L:00205b20 D:14ea1800 ! Jun 23 21:02:24 marilyn kernel: 2a9bea20 00000800 00323431 00000001 Jun 23 21:02:24 marilyn kernel: 566a7ebe 00000100 3720211e 80808080 80808080 80808080 00000515 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cb20 DS.P:0x205b20) L:00205b80 D:06e38000 Jun 23 21:02:24 marilyn kernel: 2a9beae0 00000800 00000000 00000000 Jun 23 21:02:24 marilyn kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cb20 DS.P:0x205b20) L:00205b80 D:06e38000 ! Jun 23 21:02:24 marilyn kernel: 2a9beae0 00000800 00313431 00000001 Jun 23 21:02:24 marilyn kernel: 566a82a5 00000100 371f211e 80808080 80808080 80808080 00000515 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cb80 DS.P:0x205b80) L:00205be0 D:13a14000 Jun 23 21:02:24 marilyn kernel: 2a9beb40 00000800 00000000 00000000 Jun 23 21:02:24 marilyn kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cb80 DS.P:0x205b80) L:00205be0 D:13a14000 ! Jun 23 21:02:24 marilyn kernel: 2a9beb40 00000800 00323431 00000001 Jun 23 21:02:24 marilyn kernel: 566a868e 00000100 371f201e 80808080 80808080 80808080 00000515 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cbe0 DS.P:0x205be0) L:00205c40 D:2a0c7000 Jun 23 21:02:24 marilyn kernel: 2a9beba0 00000800 00000000 00000000 Jun 23 21:02:24 marilyn kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cbe0 DS.P:0x205be0) L:00205c40 D:2a0c7000 ! Jun 23 21:02:24 marilyn kernel: 2a9beba0 00000800 00323432 00000001 Jun 23 21:02:24 marilyn kernel: 566a8a76 00000100 38282320 80808080 80808080 80808080 00000515 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cc40 DS.P:0x205c40) L:00205ca0 D:2aae6800 Jun 23 21:02:24 marilyn kernel: 2a9bec00 00000800 00000000 00000000 Jun 23 21:02:24 marilyn kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Jun 23 21:02:24 marilyn kernel: R[ 0] (DS.V:0xe9d6cc40 DS.P:0x205c40) L:00205ca0 D:2aae6800 ! Jun 23 21:02:24 marilyn kernel: 2a9bec00 00000800 00323430 00000001 Jun 23 21:02:24 marilyn kernel: 566abadd 00000100 3723231f 80808080 80808080 80808080 00000515 >How-To-Repeat: * Enable radar detection on the AR5416 * Snoop radar frames * Watch radar frames under load eventually start also triggering CRC errors >Fix: Likely just a SW WAR. >Release-Note: >Audit-Trail: >Unformatted:
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