• Bjørn Mork's avatar
    media: siano: fix divide error on 0 counters · d2310f71
    Bjørn Mork authored
    commit ec532503209053bbee0c7dac410031e50835e01a upstream.
    
    GIT_AUTHOR_DATE=1376465691
    I took a quick look at the code and wonder if the problem is caused by
    an initial zero statistics message?  This is all just a wild guess, but
    if it is correct, then the attached untested patch might fix it...
    Bjørn
    >From d78a0599d5b5d4da384eae08bf7da316389dfbe5 Mon Sep 17 00:00:00 2001
    ts_packets and ets_packets counters can be 0.  Don't fall over
    if they are. Fixes:
    [  846.851711] divide error: 0000 [#1] SMP
    [  846.851806] Modules linked in: smsdvb dvb_core ir_lirc_codec lirc_dev ir_sanyo_decoder ir_mce_kbd_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_rc5_decoder ir_nec_decoder rc_hauppauge smsusb smsmdtv rc_core pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) parport_pc ppdev lp parport cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative rfcomm bnep binfmt_misc uinput nfsd auth_rpcgss oid_registry nfs_acl nfs lockd dns_resolver fscache sunrpc ext4 jbd2 fuse tp_smapi(O) thinkpad_ec(O) loop firewire_sbp2 dm_crypt snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm thinkpad_acpi nvram snd_page_alloc hid_generic snd_seq_midi snd_seq_midi_event arc4 usbhid snd_rawmidi uvcvideo hid iwldvm coretemp kvm_intel mac8021
     1 cdc_wdm
    [  846.853477]  cdc_acm snd_seq videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media kvm radeon r852 ttm joydev cdc_ether usbnet pcmcia mii sm_common nand btusb drm_kms_helper tpm_tis acpi_cpufreq bluetooth iwlwifi nand_ecc drm nand_ids i2c_i801 mtd snd_seq_device iTCO_wdt iTCO_vendor_support r592 memstick lpc_ich mperf tpm yenta_socket pcmcia_rsrc pcmcia_core cfg80211 snd_timer snd pcspkr i2c_algo_bit crc16 i2c_core tpm_bios processor mfd_core wmi psmouse mei_me rfkill mei serio_raw soundcore evdev battery button video ac microcode ext3 mbcache jbd md_mod dm_mirror dm_region_hash dm_log dm_mod sg sr_mod sd_mod cdrom crc_t10dif firewire_ohci sdhci_pci sdhci mmc_core firewire_core crc_itu_t thermal thermal_sys ahci libahci ehci_pci uhci_hcd ehci_hcd libata scsi_mod usbcore e1000
     e usb_common
    [  846.855310]  ptp pps_core
    [  846.855356] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O 3.10-2-amd64 #1 Debian 3.10.5-1
    [  846.855490] Hardware name: LENOVO 4061WFA/4061WFA, BIOS 6FET92WW (3.22 ) 12/14/2011
    [  846.855609] task: ffffffff81613400 ti: ffffffff81600000 task.ti: ffffffff81600000
    [  846.855636] RIP: 0010:[<ffffffffa092be0c>]  [<ffffffffa092be0c>] smsdvb_onresponse+0x264/0xa86 [smsdvb]
    [  846.863906] RSP: 0018:ffff88013bc03cf0  EFLAGS: 00010046
    [  846.863906] RAX: 0000000000000000 RBX: ffff880133bf6000 RCX: 0000000000000000
    [  846.863906] RDX: 0000000000000000 RSI: ffff88005d3b58c0 RDI: ffff880133bf6000
    [  846.863906] RBP: ffff88005d1da000 R08: 0000000000000058 R09: 0000000000000015
    [  846.863906] R10: 0000000000001a0d R11: 000000000000021a R12: ffff88005d3b58c0
    [  846.863906] R13: ffff88005d1da008 R14: 00000000ffffff8d R15: ffff880036cf5060
    [  846.863906] FS:  0000000000000000(0000) GS:ffff88013bc00000(0000) knlGS:0000000000000000
    [  846.863906] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    [  846.863906] CR2: 00007f3a4b69ae50 CR3: 0000000036dac000 CR4: 00000000000407f0
    [  846.863906] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  846.863906] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    [  846.863906] Stack:
    [  846.863906]  ffff88007a102000 ffff88005d1da000 ffff88005d3b58c0 0000000000085824
    [  846.863906]  ffffffffa08c5aa3 ffff88005d1da000 ffff8800a6907390 ffff8800a69073b0
    [  846.863906]  ffff8800a6907000 ffffffffa08b642c 000000000000021a ffff8800a69073b0
    [  846.863906] Call Trace:
    [  846.863906]  <IRQ>
    [  846.863906]
    [  846.863906]  [<ffffffffa08c5aa3>] ? smscore_onresponse+0x1d5/0x353 [smsmdtv]
    [  846.863906]  [<ffffffffa08b642c>] ? smsusb_onresponse+0x146/0x192 [smsusb]
    [  846.863906]  [<ffffffffa004cb1a>] ? usb_hcd_giveback_urb+0x6c/0xac [usbcore]
    [  846.863906]  [<ffffffffa0217be1>] ? ehci_urb_done+0x62/0x72 [ehci_hcd]
    [  846.863906]  [<ffffffffa0217c82>] ? qh_completions+0x91/0x364 [ehci_hcd]
    [  846.863906]  [<ffffffffa0219bba>] ? ehci_work+0x8a/0x68e [ehci_hcd]
    [  846.863906]  [<ffffffff8107336c>] ? timekeeping_get_ns.constprop.10+0xd/0x31
    [  846.863906]  [<ffffffff81064d41>] ? update_cfs_rq_blocked_load+0xde/0xec
    [  846.863906]  [<ffffffff81058ec2>] ? run_posix_cpu_timers+0x25/0x575
    [  846.863906]  [<ffffffffa021aa46>] ? ehci_irq+0x211/0x23d [ehci_hcd]
    [  846.863906]  [<ffffffffa004c0c1>] ? usb_hcd_irq+0x31/0x48 [usbcore]
    [  846.863906]  [<ffffffff810996fd>] ? handle_irq_event_percpu+0x49/0x1a4
    [  846.863906]  [<ffffffff8109988a>] ? handle_irq_event+0x32/0x4b
    [  846.863906]  [<ffffffff8109bd76>] ? handle_fasteoi_irq+0x80/0xb6
    [  846.863906]  [<ffffffff8100e93e>] ? handle_irq+0x18/0x20
    [  846.863906]  [<ffffffff8100e657>] ? do_IRQ+0x40/0x95
    [  846.863906]  [<ffffffff813883ed>] ? common_interrupt+0x6d/0x6d
    [  846.863906]  <EOI>
    [  846.863906]
    [  846.863906]  [<ffffffff812a011c>] ? arch_local_irq_enable+0x4/0x8
    [  846.863906]  [<ffffffff812a04f3>] ? cpuidle_enter_state+0x52/0xc1
    [  846.863906]  [<ffffffff812a0636>] ? cpuidle_idle_call+0xd4/0x143
    [  846.863906]  [<ffffffff8101398c>] ? arch_cpu_idle+0x5/0x17
    [  846.863906]  [<ffffffff81072571>] ? cpu_startup_entry+0x10d/0x187
    [  846.863906]  [<ffffffff816b3d3d>] ? start_kernel+0x3e8/0x3f3
    [  846.863906]  [<ffffffff816b3777>] ? repair_env_string+0x54/0x54
    [  846.863906]  [<ffffffff816b3598>] ? x86_64_start_kernel+0xf2/0xfd
    [  846.863906] Code: 25 09 00 00 c6 83 da 08 00 00 03 8b 45 54 48 01 83 b6 08 00 00 8b 45 50 48 01 83 db 08 00 00 8b 4d 18 69 c1 ff ff 00 00 03 4d 14 <48> f7 f1 89 83 a8 09 00 00 e9 68 fe ff ff 48 8b 7f 10 e8 79 92
    [  846.863906] RIP  [<ffffffffa092be0c>] smsdvb_onresponse+0x264/0xa86 [smsdvb]
    [  846.863906]  RSP <ffff88013bc03cf0>
    Reference: http://bugs.debian.org/719623Reported-by: default avatarJohannes Rohr <jorohr@gmail.com>
    Signed-off-by: default avatarBjørn Mork <bjorn@mork.no>
    Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    d2310f71
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