On 01/15/2014 11:22 AM, Andrea Merello wrote:
Hello,
Thank you for testing!
This is interesting:
I ever worked on this patch on an older wireless-testing tree, that
gave me no oops after lot of time.
Yesterday, before sending you my patch, I ported it to a newer
wireless-testing, and I did just a quick compile/load test.
But today I got panic me too with the new kernel...
I have a serial console over I could capture the the oops..
I will look at this issue in next days...
86509.384436] divide error: 0000 [#1] PREEMPT SMP
[86509.387743] Modules linked in: rtl8180(O) mac80211 cfbfillrect
cfbimgblt cfbcopyarea drm_kms_helper cfg80211 ttm [last unloaded:
rtl8180]
[86509.399253] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G O
3.13.0-rc7-wl+ #16
[86509.399253] Hardware name: System manufacturer System Product
Name/M3N78 PRO, BIOS ASUS M3N78 PRO ACPI BIOS Revision 1402 12/04/2009
[86509.399253] task: ffffffff81c10460 ti: ffffffff81c00000 task.ti:
ffffffff81c00000
[86509.428032] RIP: 0010:[<ffffffffa00fdac2>] [<ffffffffa00fdac2>]
ieee80211_bss_info_update+0x1c2/0x350 [mac80211]
[86509.433405] RSP: 0018:ffff88006fc03cb8 EFLAGS: 00010202
[86509.441368] RAX: 00000000000003e8 RBX: ffff88006fc03d08 RCX: 0000000000000077
[86509.451441] RDX: 0000000000000000 RSI: ffff880068aa97b0 RDI: 0000000000000000
[86509.451441] RBP: ffff88006fc03cf8 R08: ffff88006fc03d08 R09: 000000000000000a
[86509.464969] R10: ffff88006fc03d08 R11: 0000000000000000 R12: ffff880068a93300
[86509.464969] R13: ffff88006c2db628 R14: ffff880068a93301 R15: ffff880068aa84c0
[86509.478134] FS: 00007f413fab8800(0000) GS:ffff88006fc00000(0000)
knlGS:0000000000000000
[86509.488032] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[86509.489400] CR2: 00007f413eedbfc9 CR3: 0000000001c0b000 CR4: 00000000000007f0
[86509.494704] Stack:
[86509.494704] 0000000000000000 0000000000000000 0000000020000000
ffff88006c2db600
[86509.494704] ffff880068a93300 ffff880068aa84c0 ffff880068a93300
ffff880068aa9ac0
[86509.494704] ffff88006fc03e38 ffffffffa00fdd8e ffff880068a93324
0000000000000053
[86509.494704] Call Trace:
[86509.494704] <IRQ>
[86509.494704] [<ffffffffa00fdd8e>] ieee80211_scan_rx+0x13e/0x1a0 [mac80211]
[86509.494704] [<ffffffffa0114ff0>] ieee80211_rx+0x700/0x7c0 [mac80211]
[86509.494704] [<ffffffffa00f6119>]
ieee80211_tasklet_handler+0xb9/0xc0 [mac80211]
[86509.494704] [<ffffffff8106b3c7>] tasklet_action+0xa7/0xb0
[86509.494704] [<ffffffff8106b7fd>] __do_softirq+0xcd/0x1d0
[86509.494704] [<ffffffff8106bba6>] irq_exit+0x76/0xa0
[86509.494704] [<ffffffff81032dde>] do_IRQ+0x5e/0xd0
[86509.494704] [<ffffffff817210ea>] common_interrupt+0x6a/0x6a
[86509.494704] <EOI>
[86509.494704] [<ffffffff81039198>] ? amd_e400_idle+0x68/0xe0
[86509.494704] [<ffffffff810398c6>] arch_cpu_idle+0x16/0x20
[86509.494704] [<ffffffff810a0d6d>] cpu_startup_entry+0x11d/0x170
[86509.494704] [<ffffffff8171344f>] rest_init+0x7f/0x90
[86509.494704] [<ffffffff81cb0d63>] start_kernel+0x307/0x313
[86509.494704] [<ffffffff81cb0865>] ? repair_env_string+0x5c/0x5c
[86509.494704] [<ffffffff81cb05a3>] x86_64_start_reservations+0x2a/0x2c
[86509.494704] [<ffffffff81cb066c>] x86_64_start_kernel+0xc7/0xca
[86509.494704] Code: 5e 41 5f 5d c3 0f 1f 40 00 45 31 c9 83 e7 20 0f
84 9f fe ff ff 45 0f be 4d 21 bf 64 00 00 00 44 89 c8 0f af c7 41 0f
be 7f 74 99 <f7> ff 41 89 c1 e9 7f fe ff ff 0
[86509.494704] RIP [<ffffffffa00fdac2>]
ieee80211_bss_info_update+0x1c2/0x350 [mac80211]
[86509.494704] RSP <ffff88006fc03cb8>
[86509.654701] ---[ end trace 08e0a7abe35b1caf ]---
[86509.661368] Kernel panic - not syncing: Fatal exception in interrupt
The divide fault occurs because hw.max_signal was not set in line 75 of
net/mac80211/scan.c. The failing line is
signal = (rx_status->signal * 100) / local->hw.max_signal;
I have not yet looked to see where that info comes from in the driver.
Larry
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