frames reception with mismatched RA #26
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twpedersen
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May 22, 2013
This avoids: Apr 12 23:52:16 homeserver kernel: imon:send_packet: task interrupted Apr 12 23:52:16 homeserver kernel: ------------[ cut here ]------------ Apr 12 23:52:16 homeserver kernel: WARNING: at drivers/usb/core/urb.c:327 usb_submit_urb+0x353/0x370() Apr 12 23:52:16 homeserver kernel: Hardware name: Unknow Apr 12 23:52:16 homeserver kernel: URB f64b6f00 submitted while active Apr 12 23:52:16 homeserver kernel: Modules linked in: Apr 12 23:52:16 homeserver kernel: Pid: 3154, comm: LCDd Not tainted 3.8.6-htpc-00005-g9e6fc5e #26 Apr 12 23:52:16 homeserver kernel: Call Trace: Apr 12 23:52:16 homeserver kernel: [<c012d778>] ? warn_slowpath_common+0x78/0xb0 Apr 12 23:52:16 homeserver kernel: [<c04136c3>] ? usb_submit_urb+0x353/0x370 Apr 12 23:52:16 homeserver kernel: [<c04136c3>] ? usb_submit_urb+0x353/0x370 Apr 12 23:52:16 homeserver kernel: [<c0447010>] ? imon_ir_change_protocol+0x150/0x150 Apr 12 23:52:16 homeserver kernel: [<c012d843>] ? warn_slowpath_fmt+0x33/0x40 Apr 12 23:52:16 homeserver kernel: [<c04136c3>] ? usb_submit_urb+0x353/0x370 Apr 12 23:52:16 homeserver kernel: [<c0446c67>] ? send_packet+0x97/0x270 Apr 12 23:52:16 homeserver kernel: [<c0446cfe>] ? send_packet+0x12e/0x270 Apr 12 23:52:16 homeserver kernel: [<c05c5743>] ? do_nanosleep+0xa3/0xd0 Apr 12 23:52:16 homeserver kernel: [<c044760e>] ? vfd_write+0xae/0x250 Apr 12 23:52:16 homeserver kernel: [<c0447560>] ? lcd_write+0x180/0x180 Apr 12 23:52:16 homeserver kernel: [<c01b2b19>] ? vfs_write+0x89/0x140 Apr 12 23:52:16 homeserver kernel: [<c01b2dda>] ? sys_write+0x4a/0x90 Apr 12 23:52:16 homeserver kernel: [<c05c7c45>] ? sysenter_do_call+0x12/0x26 Apr 12 23:52:16 homeserver kernel: ---[ end trace a0b6f0fcfd2f9a1d ]--- Apr 12 23:52:16 homeserver kernel: imon:send_packet: error submitting urb(-16) Apr 12 23:52:16 homeserver kernel: imon:vfd_write: send packet #3 failed Apr 12 23:52:16 homeserver kernel: imon:send_packet: error submitting urb(-16) Apr 12 23:52:16 homeserver kernel: imon:vfd_write: send packet #0 failed Signed-off-by: Kevin Baradon <kevin.baradon@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
twpedersen
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May 22, 2013
em28xx is oopsing with some DVB devices: [10856.061884] general protection fault: 0000 [#1] SMP [10856.067041] Modules linked in: rc_hauppauge em28xx_rc xc5000 drxk em28xx_dvb dvb_core em28xx videobuf2_vmalloc videobuf2_memops videobuf2_core rc_pixelview_new tuner_xc2028 tuner cx8800 cx88xx tveeprom btcx_risc videobuf_dma_sg videobuf_core rc_core v4l2_common videodev ebtable_nat ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_CHECKSUM be2iscsi iscsi_boot_sysfs iptable_mangle bnx2i cnic uio cxgb4i cxgb4 tun bridge cxgb3i cxgb3 stp ip6t_REJECT mdio libcxgbi nf_conntrack_ipv6 llc nf_defrag_ipv6 ib_iser rdma_cm ib_addr xt_conntrack iw_cm ib_cm ib_sa nf_conntrack ib_mad ib_core bnep bluetooth iscsi_tcp libiscsi_tcp ip6table_filter libiscsi ip6_tables scsi_transport_iscsi xfs libcrc32c snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm tg3 snd_page_alloc snd_timer [10856.139176] snd ptp iTCO_wdt soundcore pps_core iTCO_vendor_support lpc_ich mfd_core coretemp nfsd hp_wmi crc32c_intel microcode serio_raw rfkill sparse_keymap nfs_acl lockd sunrpc kvm_intel kvm uinput binfmt_misc firewire_ohci nouveau mxm_wmi i2c_algo_bit drm_kms_helper firewire_core crc_itu_t ttm drm i2c_core wmi [last unloaded: dib0070] [10856.168969] CPU 1 [10856.170799] Pid: 13606, comm: dvbv5-zap Not tainted 3.9.0-rc5+ #26 Hewlett-Packard HP Z400 Workstation/0AE4h [10856.181187] RIP: 0010:[<ffffffffa0459e47>] [<ffffffffa0459e47>] em28xx_write_regs_req+0x37/0x1c0 [em28xx] [10856.191028] RSP: 0018:ffff880118401a58 EFLAGS: 00010282 [10856.196533] RAX: 00020000012d0000 RBX: ffff88010804aec8 RCX: ffff880118401b14 [10856.203852] RDX: 0000000000000048 RSI: 0000000000000000 RDI: ffff88010804aec8 [10856.211174] RBP: ffff880118401ac8 R08: 0000000000000001 R09: 0000000000000000 [10856.218496] R10: 0000000000000000 R11: 0000000000000006 R12: 0000000000000048 [10856.226026] R13: ffff880118401b14 R14: ffff88011752b258 R15: ffff88011752b258 [10856.233352] FS: 00007f26636d2740(0000) GS:ffff88011fc20000(0000) knlGS:0000000000000000 [10856.241626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [10856.247565] CR2: 00007f2663716e20 CR3: 00000000c7eb1000 CR4: 00000000000007e0 [10856.254889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [10856.262215] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [10856.269542] Process dvbv5-zap (pid: 13606, threadinfo ffff880118400000, task ffff8800cd625d40) [10856.278340] Stack: [10856.280564] ffff88011ffe8de8 0000000000000002 0000000000000000 ffff88011ffe9b00 [10856.288191] ffff880118401b14 00ff88011ffe9b08 ffff880100000048 ffffffff8112a52a [10856.295893] 0000000000000001 ffff88010804aec8 0000000000000048 ffff880118401b14 [10856.303521] Call Trace: [10856.306182] [<ffffffff8112a52a>] ? __alloc_pages_nodemask+0x15a/0x960 [10856.312912] [<ffffffffa045a002>] em28xx_write_regs+0x32/0xa0 [em28xx] [10856.319638] [<ffffffffa045a221>] em28xx_write_reg+0x21/0x30 [em28xx] [10856.326279] [<ffffffffa045a2cc>] em28xx_gpio_set+0x9c/0x100 [em28xx] [10856.332919] [<ffffffffa045a3ac>] em28xx_set_mode+0x7c/0x80 [em28xx] [10856.339472] [<ffffffffa03ef032>] em28xx_dvb_bus_ctrl+0x32/0x40 [em28xx_dvb] This is caused by commit c7a45e5, that added support for two I2C buses. A partial fix was applied at 3de09fb, but it doesn't cover all cases, as the DVB core fills fe->dvb->priv with adapter->priv. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
jlopex
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Oct 30, 2013
With DT-based boot, the GPMC OneNAND sync mode setup does not work
correctly. During the async mode setup, sync flags gets incorrectly
set in the onenand_async data and the system crashes during the async
setup. Also, the sync mode never gets set in gpmc_onenand_data->flags, so
even without the crash, the actual sync mode setup would never be called.
The patch fixes this by adjusting the gpmc_onenand_data->flags when the
data is read from the DT. Also while doing this we force the onenand_async
to be always async.
The patch enables to use the following DTS chunk (that should correspond
the arch/arm/mach-omap2/board-rm680.c board file setup) with Nokia N950,
which currently crashes with 3.12-rc1. The crash output can be also
found below.
&gpmc {
ranges = <0 0 0x04000000 0x20000000>;
onenand@0,0 {
#address-cells = <1>;
#size-cells = <1>;
reg = <0 0 0x20000000>;
gpmc,sync-read;
gpmc,sync-write;
gpmc,burst-length = <16>;
gpmc,burst-read;
gpmc,burst-wrap;
gpmc,burst-write;
gpmc,device-width = <2>;
gpmc,mux-add-data = <2>;
gpmc,cs-on-ns = <0>;
gpmc,cs-rd-off-ns = <87>;
gpmc,cs-wr-off-ns = <87>;
gpmc,adv-on-ns = <0>;
gpmc,adv-rd-off-ns = <10>;
gpmc,adv-wr-off-ns = <10>;
gpmc,oe-on-ns = <15>;
gpmc,oe-off-ns = <87>;
gpmc,we-on-ns = <0>;
gpmc,we-off-ns = <87>;
gpmc,rd-cycle-ns = <112>;
gpmc,wr-cycle-ns = <112>;
gpmc,access-ns = <81>;
gpmc,page-burst-access-ns = <15>;
gpmc,bus-turnaround-ns = <0>;
gpmc,cycle2cycle-delay-ns = <0>;
gpmc,wait-monitoring-ns = <0>;
gpmc,clk-activation-ns = <5>;
gpmc,wr-data-mux-bus-ns = <30>;
gpmc,wr-access-ns = <81>;
gpmc,sync-clk-ps = <15000>;
};
};
[ 1.467559] GPMC CS0: cs_on : 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.474822] GPMC CS0: cs_rd_off : 1 ticks, 5 ns (was 24 ticks) 5 ns
[ 1.482116] GPMC CS0: cs_wr_off : 14 ticks, 71 ns (was 24 ticks) 71 ns
[ 1.489349] GPMC CS0: adv_on : 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.496582] GPMC CS0: adv_rd_off: 3 ticks, 15 ns (was 3 ticks) 15 ns
[ 1.503845] GPMC CS0: adv_wr_off: 3 ticks, 15 ns (was 3 ticks) 15 ns
[ 1.511077] GPMC CS0: oe_on : 3 ticks, 15 ns (was 4 ticks) 15 ns
[ 1.518310] GPMC CS0: oe_off : 1 ticks, 5 ns (was 24 ticks) 5 ns
[ 1.525543] GPMC CS0: we_on : 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.532806] GPMC CS0: we_off : 8 ticks, 40 ns (was 24 ticks) 40 ns
[ 1.540039] GPMC CS0: rd_cycle : 4 ticks, 20 ns (was 29 ticks) 20 ns
[ 1.547302] GPMC CS0: wr_cycle : 4 ticks, 20 ns (was 29 ticks) 20 ns
[ 1.554504] GPMC CS0: access : 0 ticks, 0 ns (was 23 ticks) 0 ns
[ 1.561767] GPMC CS0: page_burst_access: 0 ticks, 0 ns (was 3 ticks) 0 ns
[ 1.569641] GPMC CS0: bus_turnaround: 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.577270] GPMC CS0: cycle2cycle_delay: 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.585144] GPMC CS0: wait_monitoring: 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.592834] GPMC CS0: clk_activation: 0 ticks, 0 ns (was 0 ticks) 0 ns
[ 1.600463] GPMC CS0: wr_data_mux_bus: 5 ticks, 25 ns (was 8 ticks) 25 ns
[ 1.608154] GPMC CS0: wr_access : 0 ticks, 0 ns (was 23 ticks) 0 ns
[ 1.615386] GPMC CS0 CLK period is 5 ns (div 1)
[ 1.625122] Unhandled fault: external abort on non-linefetch (0x1008) at 0xf009e442
[ 1.633178] Internal error: : 1008 [#1] ARM
[ 1.637573] Modules linked in:
[ 1.640777] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.0-rc1-n9xx-los.git-5318619-00006-g4baa700-dirty #26
[ 1.651123] task: ef04c000 ti: ef050000 task.ti: ef050000
[ 1.656799] PC is at gpmc_onenand_setup+0x98/0x1e0
[ 1.661865] LR is at gpmc_cs_set_timings+0x494/0x5a4
[ 1.667083] pc : [<c002e040>] lr : [<c001f384>] psr: 60000113
[ 1.667083] sp : ef051d10 ip : ef051ce0 fp : ef051d94
[ 1.679138] r10: c0caaf60 r9 : ef050000 r8 : ef18b32c
[ 1.684631] r7 : f0080000 r6 : c0caaf60 r5 : 00000000 r4 : f009e400
[ 1.691497] r3 : f009e442 r2 : 80050000 r1 : 00000014 r0 : 00000000
[ 1.698333] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 1.706024] Control: 10c5387d Table: af290019 DAC: 00000015
[ 1.712066] Process swapper (pid: 1, stack limit = 0xef050240)
[ 1.718200] Stack: (0xef051d10 to 0xef052000)
[ 1.722778] 1d00: 00004000 00001402 00000000 00000005
[ 1.731384] 1d20: 00000047 00000000 0000000f 0000000f 00000000 00000028 0000000f 00000005
[ 1.739990] 1d40: 00000000 00000000 00000014 00000014 00000000 00000000 00000000 00000000
[ 1.748596] 1d60: 00000000 00000019 00000000 00000000 ef18b000 ef099c50 c0c8cb30 00000000
[ 1.757171] 1d80: c0488074 c048f868 ef051dcc ef051d98 c024447c c002dfb4 00000000 c048f868
[ 1.765777] 1da0: 00000000 00000000 c010e4a4 c0dbbb7c c0c8cb40 00000000 c0ca2500 c0488074
[ 1.774383] 1dc0: ef051ddc ef051dd0 c01fd508 c0244370 ef051dfc ef051de0 c01fc204 c01fd4f4
[ 1.782989] 1de0: c0c8cb40 c0ca2500 c0c8cb74 00000000 ef051e1c ef051e00 c01fc3b0 c01fc104
[ 1.791595] 1e00: ef0983bc 00000000 c0ca2500 c01fc31c ef051e44 ef051e20 c01fa794 c01fc328
[ 1.800201] 1e20: ef03634c ef0983b0 ef27d534 c0ca2500 ef27d500 c0c9a2f8 ef051e54 ef051e48
[ 1.808807] 1e40: c01fbcfc c01fa744 ef051e84 ef051e58 c01fb838 c01fbce4 c0411df8 c0caa040
[ 1.817413] 1e60: ef051e84 c0ca2500 00000006 c0caa040 00000066 c0488074 ef051e9c ef051e88
[ 1.825988] 1e80: c01fca30 c01fb768 c04975b8 00000006 ef051eac ef051ea0 c01fd728 c01fc9bc
[ 1.834594] 1ea0: ef051ebc ef051eb0 c048808c c01fd6e4 ef051f4c ef051ec0 c0008888 c0488080
[ 1.843200] 1ec0: 0000006f c046bae8 00000000 00000000 ef051efc ef051ee0 ef051f04 ef051ee8
[ 1.851806] 1ee0: c046d400 c0181218 c046d410 c18da8d5 c036a8e4 00000066 ef051f4c ef051f08
[ 1.860412] 1f00: c004b9a8 c046d41c c048f840 00000006 00000006 c046b488 00000000 c043ec08
[ 1.869018] 1f20: ef051f4c c04975b8 00000006 c0caa040 00000066 c046d410 c048f85c c048f868
[ 1.877593] 1f40: ef051f94 ef051f50 c046db8c c00087a0 00000006 00000006 c046d410 ffffffff
[ 1.886199] 1f60: ffffffff ffffffff ffffffff 00000000 c0348fd0 00000000 00000000 00000000
[ 1.894805] 1f80: 00000000 00000000 ef051fac ef051f98 c0348fe0 c046daa8 00000000 00000000
[ 1.903411] 1fa0: 00000000 ef051fb0 c000e7f8 c0348fdc 00000000 00000000 00000000 00000000
[ 1.912017] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.920623] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 ffffffff ffffffff
[ 1.929199] Backtrace:
[ 1.931793] [<c002dfa8>] (gpmc_onenand_setup+0x0/0x1e0) from [<c024447c>] (omap2_onenand_probe+0x118/0x49c)
[ 1.942047] [<c0244364>] (omap2_onenand_probe+0x0/0x49c) from [<c01fd508>] (platform_drv_probe+0x20/0x24)
[ 1.952117] r8:c0488074 r7:c0ca2500 r6:00000000 r5:c0c8cb40 r4:c0dbbb7c
[ 1.959197] [<c01fd4e8>] (platform_drv_probe+0x0/0x24) from [<c01fc204>] (driver_probe_device+0x10c/0x224)
[ 1.969360] [<c01fc0f8>] (driver_probe_device+0x0/0x224) from [<c01fc3b0>] (__driver_attach+0x94/0x98)
[ 1.979125] r7:00000000 r6:c0c8cb74 r5:c0ca2500 r4:c0c8cb40
[ 1.985107] [<c01fc31c>] (__driver_attach+0x0/0x98) from [<c01fa794>] (bus_for_each_dev+0x5c/0x90)
[ 1.994506] r6:c01fc31c r5:c0ca2500 r4:00000000 r3:ef0983bc
[ 2.000488] [<c01fa738>] (bus_for_each_dev+0x0/0x90) from [<c01fbcfc>] (driver_attach+0x24/0x28)
[ 2.009735] r6:c0c9a2f8 r5:ef27d500 r4:c0ca2500
[ 2.014587] [<c01fbcd8>] (driver_attach+0x0/0x28) from [<c01fb838>] (bus_add_driver+0xdc/0x260)
[ 2.023742] [<c01fb75c>] (bus_add_driver+0x0/0x260) from [<c01fca30>] (driver_register+0x80/0xfc)
[ 2.033081] r8:c0488074 r7:00000066 r6:c0caa040 r5:00000006 r4:c0ca2500
[ 2.040161] [<c01fc9b0>] (driver_register+0x0/0xfc) from [<c01fd728>] (__platform_driver_register+0x50/0x64)
[ 2.050476] r5:00000006 r4:c04975b8
[ 2.054260] [<c01fd6d8>] (__platform_driver_register+0x0/0x64) from [<c048808c>] (omap2_onenand_driver_init+0x18/0x20)
[ 2.065490] [<c0488074>] (omap2_onenand_driver_init+0x0/0x20) from [<c0008888>] (do_one_initcall+0xf4/0x150)
[ 2.075836] [<c0008794>] (do_one_initcall+0x0/0x150) from [<c046db8c>] (kernel_init_freeable+0xf0/0x1b4)
[ 2.085815] [<c046da9c>] (kernel_init_freeable+0x0/0x1b4) from [<c0348fe0>] (kernel_init+0x10/0xec)
[ 2.095336] [<c0348fd0>] (kernel_init+0x0/0xec) from [<c000e7f8>] (ret_from_fork+0x14/0x3c)
[ 2.104125] r4:00000000 r3:00000000
[ 2.107879] Code: ebffc3ae e2505000 ba00002e e2843042 (e1d320b0)
[ 2.114318] ---[ end trace b8ee3e3e5e002451 ]---
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>
silverjam
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Nov 19, 2013
As the new x86 CPU bootup printout format code maintainer, I am taking immediate action to improve and clean (and thus indulge my OCD) the reporting of the cores when coming up online. Fix padding to a right-hand alignment, cleanup code and bind reporting width to the max number of supported CPUs on the system, like this: [ 0.074509] smpboot: Booting Node 0, Processors: #1 #2 #3 #4 #5 #6 #7 OK [ 0.644008] smpboot: Booting Node 1, Processors: #8 #9 #10 #11 #12 #13 #14 #15 OK [ 1.245006] smpboot: Booting Node 2, Processors: #16 #17 #18 #19 #20 #21 #22 #23 OK [ 1.864005] smpboot: Booting Node 3, Processors: #24 #25 #26 #27 #28 #29 #30 #31 OK [ 2.489005] smpboot: Booting Node 4, Processors: #32 #33 #34 #35 #36 #37 #38 #39 OK [ 3.093005] smpboot: Booting Node 5, Processors: #40 #41 #42 #43 #44 #45 #46 #47 OK [ 3.698005] smpboot: Booting Node 6, Processors: #48 #49 #50 #51 #52 #53 #54 #55 OK [ 4.304005] smpboot: Booting Node 7, Processors: #56 #57 #58 #59 #60 #61 #62 #63 OK [ 4.961413] Brought up 64 CPUs and this: [ 0.072367] smpboot: Booting Node 0, Processors: #1 #2 #3 #4 #5 #6 #7 OK [ 0.686329] Brought up 8 CPUs Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Libin <huawei.libin@huawei.com> Cc: wangyijing@huawei.com Cc: fenghua.yu@intel.com Cc: guohanjun@huawei.com Cc: paul.gortmaker@windriver.com Link: http://lkml.kernel.org/r/20130927143554.GF4422@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>
silverjam
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Nov 19, 2013
Turn it into (for example): [ 0.073380] x86: Booting SMP configuration: [ 0.074005] .... node #0, CPUs: #1 #2 #3 #4 #5 #6 #7 [ 0.603005] .... node #1, CPUs: #8 #9 #10 #11 #12 #13 #14 #15 [ 1.200005] .... node #2, CPUs: #16 #17 #18 #19 #20 #21 #22 #23 [ 1.796005] .... node #3, CPUs: #24 #25 #26 #27 #28 #29 #30 #31 [ 2.393005] .... node #4, CPUs: #32 #33 #34 #35 #36 #37 #38 #39 [ 2.996005] .... node #5, CPUs: #40 #41 #42 #43 #44 #45 #46 #47 [ 3.600005] .... node #6, CPUs: #48 #49 #50 #51 #52 #53 #54 #55 [ 4.202005] .... node #7, CPUs: #56 #57 #58 #59 #60 #61 #62 #63 [ 4.811005] .... node #8, CPUs: #64 #65 #66 #67 #68 #69 #70 #71 [ 5.421006] .... node #9, CPUs: #72 #73 #74 #75 #76 #77 #78 #79 [ 6.032005] .... node #10, CPUs: #80 #81 #82 #83 #84 #85 #86 #87 [ 6.648006] .... node #11, CPUs: #88 #89 #90 #91 #92 #93 #94 #95 [ 7.262005] .... node #12, CPUs: #96 #97 #98 #99 #100 #101 #102 #103 [ 7.865005] .... node #13, CPUs: #104 #105 #106 #107 #108 #109 #110 #111 [ 8.466005] .... node #14, CPUs: #112 #113 #114 #115 #116 #117 #118 #119 [ 9.073006] .... node #15, CPUs: #120 #121 #122 #123 #124 #125 #126 #127 [ 9.679901] x86: Booted up 16 nodes, 128 CPUs and drop useless elements. Change num_digits() to hpa's division-avoiding, cell-phone-typed version which he went at great lengths and pains to submit on a Saturday evening. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: huawei.libin@huawei.com Cc: wangyijing@huawei.com Cc: fenghua.yu@intel.com Cc: guohanjun@huawei.com Cc: paul.gortmaker@windriver.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20130930095624.GB16383@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>
ctwitty
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this issue
Mar 13, 2014
…culation Currently mx53 (CortexA8) running at 1GHz reports: Calibrating delay loop... 663.55 BogoMIPS (lpj=3317760) Tom Evans verified that alignments of 0x0 and 0x8 run the two instructions of __loop_delay in one clock cycle (1 clock/loop), while alignments of 0x4 and 0xc take 3 clocks to run the loop twice. (1.5 clock/loop) The original object code looks like this: 00000010 <__loop_const_udelay>: 10: e3e01000 mvn r1, #0 14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8> 18: e5922000 ldr r2, [r2] 1c: e0800921 add r0, r0, r1, lsr #18 20: e1a00720 lsr r0, r0, #14 24: e0822b21 add r2, r2, r1, lsr #22 28: e1a02522 lsr r2, r2, #10 2c: e0000092 mul r0, r2, r0 30: e0800d21 add r0, r0, r1, lsr #26 34: e1b00320 lsrs r0, r0, #6 38: 01a0f00e moveq pc, lr 0000003c <__loop_delay>: 3c: e2500001 subs r0, r0, #1 40: 8afffffe bhi 3c <__loop_delay> 44: e1a0f00e mov pc, lr After adding the 'align 3' directive to __loop_delay (align to 8 bytes): 00000010 <__loop_const_udelay>: 10: e3e01000 mvn r1, #0 14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8> 18: e5922000 ldr r2, [r2] 1c: e0800921 add r0, r0, r1, lsr #18 20: e1a00720 lsr r0, r0, #14 24: e0822b21 add r2, r2, r1, lsr #22 28: e1a02522 lsr r2, r2, #10 2c: e0000092 mul r0, r2, r0 30: e0800d21 add r0, r0, r1, lsr #26 34: e1b00320 lsrs r0, r0, #6 38: 01a0f00e moveq pc, lr 3c: e320f000 nop {0} 00000040 <__loop_delay>: 40: e2500001 subs r0, r0, #1 44: 8afffffe bhi 40 <__loop_delay> 48: e1a0f00e mov pc, lr 4c: e320f000 nop {0} , which now reports: Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736) Some more test results: On mx31 (ARM1136) running at 532 MHz, before the patch: Calibrating delay loop... 351.43 BogoMIPS (lpj=1757184) On mx31 (ARM1136) running at 532 MHz after the patch: Calibrating delay loop... 528.79 BogoMIPS (lpj=2643968) Also tested on mx6 (CortexA9) and on mx27 (ARM926), which shows the same BogoMIPS value before and after this patch. Reported-by: Tom Evans <tom_usenet@optusnet.com.au> Suggested-by: Tom Evans <tom_usenet@optusnet.com.au> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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…d problems with booting Without that change booting leads to crash with more warnings like below: [ 0.284454] omap_hwmod: uart4: cannot clk_get main_clk uart4_fck [ 0.284484] omap_hwmod: uart4: cannot _init_clocks [ 0.284484] ------------[ cut here ]------------ [ 0.284545] WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_hwmod.c:2543 _init+0x300/0x3e4() [ 0.284545] omap_hwmod: uart4: couldn't init clocks [ 0.284576] Modules linked in: [ 0.284606] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-next-20140124-00020-gd2aefec-dirty #26 [ 0.284637] [<c00151c0>] (unwind_backtrace) from [<c0011e20>] (show_stack+0x10/0x14) [ 0.284667] [<c0011e20>] (show_stack) from [<c0568544>] (dump_stack+0x7c/0x94) [ 0.284729] [<c0568544>] (dump_stack) from [<c003ff94>] (warn_slowpath_common+0x6c/0x90) [ 0.284729] [<c003ff94>] (warn_slowpath_common) from [<c003ffe8>] (warn_slowpath_fmt+0x30/0x40) [ 0.284759] [<c003ffe8>] (warn_slowpath_fmt) from [<c07d1be8>] (_init+0x300/0x3e4) [ 0.284790] [<c07d1be8>] (_init) from [<c07d217c>] (__omap_hwmod_setup_all+0x40/0x8c) [ 0.284820] [<c07d217c>] (__omap_hwmod_setup_all) from [<c0008918>] (do_one_initcall+0xe8/0x14c) [ 0.284851] [<c0008918>] (do_one_initcall) from [<c07c5c18>] (kernel_init_freeable+0x104/0x1c8) [ 0.284881] [<c07c5c18>] (kernel_init_freeable) from [<c0563524>] (kernel_init+0x8/0x118) [ 0.284912] [<c0563524>] (kernel_init) from [<c000e368>] (ret_from_fork+0x14/0x2c) [ 0.285064] ---[ end trace 63de210ad43b627d ]--- Reference: https://lkml.org/lkml/2013/10/8/553 Signed-off-by: Marek Belisko <marek@goldelico.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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Ming Ann reported an issue with ping duplication at: http://lists.open80211s.org/pipermail/devel/2013-March/004193.html
Apparently AR9160 cards and older can't actually implement the FIF_OTHER_BSS filter and just enables promiscuous mode. This causes duplicate frames to be received in a 3 node mesh when / if the hwmp code switches to a multihop path.
See http://lists.open80211s.org/pipermail/devel/attachments/20130313/38b4ad3f/attachment.obj for a patch which ignores frames with mismatched RA even though the HW should do this for us.
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