Hi, Paul Jones <p.jones@xxxxxxxxxx> writes: > On 10 Oct 2015, at 16:32, Paul Jones <p.jones@xxxxxxxxxx> wrote: > >> I came across the following kernel message on the latest 4.3-rc4 whilst performance testing on a USB3380 device connected to a Mac (10.9.5): >> >> [ 51.613838] WARNING: CPU: 2 PID: 0 at drivers/usb/gadget/function/f_mass_storage.c:346 fsg_setup+0x12a/0x170 [usb_f_mass_storage]() >> [ 51.613838] Modules linked in: usb_f_mass_storage libcomposite configfs drbg ansi_cprng ctr ccm arc4 snd_hda_codec_hdmi iwlmvm i915 mac80211 snd_hda_codec_realtek snd_hda_codec_generic hid_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp iwlwifi kvm_intel cfg80211 kvm drm_kms_helper drm snd_hda_intel snd_hda_codec btusb btrtl crct10dif_pclmul crc32_pclmul btbcm snd_hda_core ghash_clmulni_intel btintel bluetooth snd_hwdep e1000e aesni_intel aes_x86_64 lrw snd_pcm gf128mul glue_helper ablk_helper cryptd serio_raw alx mei_me lpc_ich usbhid mei snd_timer snd net2280 i2c_algo_bit ptp udc_core fb_sys_fops mdio syscopyarea pps_core sysfillrect soundcore sysimgblt i2c_hid hid video dw_dmac sdhci_acpi shpchp i2c_designware_platform dw_dmac_core spi_pxa2xx_platform sdhci 8250_dw i2c_designware_core acpi_pad lp mac_hid parport >> [ 51.613858] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G W 4.3.0-rc4+ #4 >> [ 51.613859] Hardware name: Gigabyte Technology Co., Ltd. H97N-WIFI/H97N-WIFI, BIOS F7 04/21/2015 >> [ 51.613860] ffffffffa03e9e10 ffff88021eb03d70 ffffffff81393f5d 0000000000000000 >> [ 51.613861] ffff88021eb03da8 ffffffff81075856 ffff880037be4400 ffff88020b3023c8 >> [ 51.613862] ffff880037be4400 00000000ffffffa1 0000000000000000 ffff88021eb03db8 >> [ 51.613863] Call Trace: >> [ 51.613864] <IRQ> [<ffffffff81393f5d>] dump_stack+0x44/0x57 >> [ 51.613867] [<ffffffff81075856>] warn_slowpath_common+0x86/0xc0 >> [ 51.613868] [<ffffffff8107594a>] warn_slowpath_null+0x1a/0x20 >> [ 51.613870] [<ffffffffa03e4c2a>] fsg_setup+0x12a/0x170 [usb_f_mass_storage] >> [ 51.613872] [<ffffffffa036ebd3>] composite_setup+0x173/0x16b0 [libcomposite] >> [ 51.613873] [<ffffffff810e41da>] ? ktime_get+0x3a/0x90 >> [ 51.613874] [<ffffffff8104dac9>] ? lapic_next_deadline+0x29/0x30 >> [ 51.613875] [<ffffffff810e41da>] ? ktime_get+0x3a/0x90 >> [ 51.613877] [<ffffffffa00e8452>] net2280_irq+0xba2/0x10db [net2280] >> [ 51.613879] [<ffffffff810cb8b9>] handle_irq_event_percpu+0x39/0x180 >> [ 51.613880] [<ffffffff810cba45>] handle_irq_event+0x45/0x70 >> [ 51.613881] [<ffffffff810ceab9>] handle_edge_irq+0x99/0x150 >> [ 51.613883] [<ffffffff810190cd>] handle_irq+0x1d/0x30 >> [ 51.613883] [<ffffffff8177ccbd>] do_IRQ+0x4d/0xd0 >> [ 51.613885] [<ffffffff8177a947>] common_interrupt+0x87/0x87 >> [ 51.613885] <EOI> [<ffffffff81631638>] ? cpuidle_enter_state+0xb8/0x220 >> [ 51.613888] [<ffffffff816317d7>] cpuidle_enter+0x17/0x20 >> [ 51.613889] [<ffffffff810b5b52>] call_cpuidle+0x32/0x60 >> [ 51.613890] [<ffffffff816317b3>] ? cpuidle_select+0x13/0x20 >> [ 51.613891] [<ffffffff810b5d9c>] cpu_startup_entry+0x21c/0x2e0 >> [ 51.613891] [<ffffffff8104c4d4>] start_secondary+0x104/0x130 >> [ 51.613892] ---[ end trace bda1c37ade46c57d ]— >> >> I can also reliable reproduce this by connecting the USB3380 to a USB port on the same Linux machine. >> In that case I also see an error: >> net2280 <pci-id>: net2280_enable: error=-22 >> >> Perhaps unrelated, but there is also a message: >> configfs-gadget gadget: common->fsg is NULL in fsg_setup at 511 > The same crash happens in 4.2 as well but not in 4.1. care to run a git bisect and find offending commit ? -- balbi
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