https://bugs.kde.org/show_bug.cgi?id=375811
--- Comment #3 from Mauro Carvalho Chehab <mchehab+...@kernel.org> --- (In reply to Mauro Carvalho Chehab from comment #2) > (In reply to yulinux from comment #1) > > If it stops working after a kernel update, maybe the problem is the kernel > > and not kaffeine. But Mauro Carvalho Chehab maybe knows. > > That sounds more like a Kernel bug. By default, Kernel 4.9 doesn't allow > using a buffer at the stack to be used to send/receive data from USB devices > anymore. Indeed it is a Kernel bug. Tested here with a Siano device. dmesg clearly shows the bug: [ 2758.493225] WARNING: CPU: 3 PID: 12035 at drivers/usb/core/hcd.c:1584 usb_hcd_map_urb_for_dma+0x37c/0x570 [usbcore] [ 2758.493229] transfer buffer not dma capable [ 2758.493233] Modules linked in: smsdvb(+) smsusb(+) smsmdtv sp2 ts2020 dvb_usb_dvbsky dvb_usb_v2 m88ds3103 i2c_mux dvb_core rc_core xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter snd_hda_codec_hdmi cpufreq_powersave cpufreq_conservative cpufreq_userspace cmac bnep arc4 binfmt_misc i915 iwlmvm mac80211 iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp iwlwifi kvm_intel i2c_algo_bit drm_kms_helper kvm btusb btrtl btbcm drm btintel bluetooth cfg80211 pl2303 snd_hda_intel irqbypass usbserial e1000e [ 2758.493340] snd_hda_codec crct10dif_pclmul crc32_pclmul crc32c_intel snd_soc_ssm4567 ghash_clmulni_intel snd_soc_core snd_hwdep aesni_intel snd_hda_core mei_me aes_x86_64 crypto_simd rfkill mei glue_helper ptp cryptd ehci_pci snd_pcm shpchp ehci_hcd pps_core sg lpc_ich mfd_core i2c_i801 pcspkr sdhci_acpi snd_timer sdhci snd mmc_core battery elan_i2c fjes acpi_als soundcore i2c_hid tpm_tis kfifo_buf tpm_tis_core industrialio video dw_dmac i2c_designware_platform tpm i2c_designware_core button acpi_pad parport_pc ppdev lp parport ip_tables x_tables ext4 crc16 jbd2 fscrypto mbcache joydev evdev hid_logitech_hidpp dm_mod hid_logitech_dj usbhid hid sd_mod ahci libahci xhci_pci libata xhci_hcd scsi_mod usbcore fan thermal [ 2758.493457] CPU: 3 PID: 12035 Comm: modprobe Not tainted 4.10.0-rc7 #53 [ 2758.493461] Hardware name: /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015 [ 2758.493466] Call Trace: [ 2758.493479] ? dump_stack+0x5c/0x78 [ 2758.493486] ? __warn+0xbe/0xe0 [ 2758.493492] ? warn_slowpath_fmt+0x5f/0x80 [ 2758.493521] ? usb_hcd_map_urb_for_dma+0x37c/0x570 [usbcore] [ 2758.493530] ? get_device+0x13/0x20 [ 2758.493554] ? usb_hcd_submit_urb+0xca/0xa50 [usbcore] [ 2758.493565] ? device_create_groups_vargs+0xd9/0xf0 [ 2758.493575] ? device_create+0x51/0x70 [ 2758.493602] ? usb_start_wait_urb+0x6d/0x170 [usbcore] [ 2758.493615] ? smsusb_sendrequest+0xbf/0x110 [smsusb] [ 2758.493627] ? smscore_configure_gpio+0xa7/0xe0 [smsmdtv] [ 2758.493637] ? sms_set_gpio+0x59/0xa0 [smsmdtv] [ 2758.493647] ? sms_board_setup+0x4d/0x80 [smsmdtv] [ 2758.493657] ? smsdvb_hotplug+0x29f/0x3d0 [smsdvb] [ 2758.493666] ? smsdvb_hotplug+0x3d0/0x3d0 [smsdvb] [ 2758.493675] ? smsdvb_unregister_client+0x80/0x80 [smsdvb] [ 2758.493683] ? smsdvb_sleep+0x70/0x70 [smsdvb] [ 2758.493694] ? smscore_register_hotplug+0x61/0xe0 [smsmdtv] [ 2758.493700] ? 0xffffffffc0c66000 [ 2758.493710] ? smsdvb_module_init+0x3c/0x1000 [smsdvb] [ 2758.493714] ? 0xffffffffc0c66000 [ 2758.493722] ? do_one_initcall+0x4e/0x1a0 [ 2758.493732] ? kmem_cache_alloc_trace+0x106/0x220 [ 2758.493742] ? do_init_module+0x5b/0x1f6 [ 2758.493751] ? load_module+0x25df/0x2a10 [ 2758.493757] ? __symbol_put+0x60/0x60 [ 2758.493766] ? vfs_read+0x119/0x130 [ 2758.493775] ? SYSC_finit_module+0xc6/0xf0 [ 2758.493785] ? entry_SYSCALL_64_fastpath+0x1e/0xad [ 2758.493791] ---[ end trace d99900d4efea0bfc ]--- -- You are receiving this mail because: You are watching all bug changes.
