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Subject2.6.32.28 - BUG: sleeping function called from invalid context at kernel/mutex.c:94
Hello,
one more problem I've encountered on 2.6.32.28 after upgrading from 2.6.27.x:

[ 173.829570] BUG: sleeping function called from invalid context at kernel/mutex.c:94
[ 173.829575] in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper
[ 173.829580] Pid: 0, comm: swapper Not tainted 2.6.32lb.32 #1
[ 173.829583] Call Trace:
[ 173.829585] <IRQ> [<ffffffff8103a746>] __might_sleep+0xe6/0x100
[ 173.829601] [<ffffffff8133871f>] mutex_lock+0x1f/0x50
[ 173.829607] [<ffffffff81211ca0>] tty_unthrottle+0x20/0x60
[ 173.829614] [<ffffffffa069fd01>] ppp_asynctty_receive+0x1d1/0x510 [ppp_async]
[ 173.829618] [<ffffffff8121409a>] flush_to_ldisc+0x16a/0x1d0
[ 173.829622] [<ffffffff81214155>] tty_flip_buffer_push+0x55/0x80
[ 173.829645] [<ffffffffa02c8c9c>] put_rxbuf_data+0xac/0x160 [hso]
[ 173.829651] [<ffffffffa02c8e01>] put_rxbuf_data_and_resubmit_bulk_urb+0x31/0x70 [hso]
[ 173.829657] [<ffffffffa02c8f5c>] hso_std_serial_read_bulk_callback+0x8c/0x1b0 [hso]
[ 173.829663] [<ffffffff812479be>] usb_hcd_giveback_urb+0x5e/0xe0
[ 173.829680] [<ffffffffa00012db>] ehci_urb_done+0x8b/0xe0 [ehci_hcd]
[ 173.829687] [<ffffffffa00013d4>] qh_completions+0xa4/0x4a0 [ehci_hcd]
[ 173.829694] [<ffffffffa0002272>] ehci_work+0x92/0x9c0 [ehci_hcd]
[ 173.829698] [<ffffffff81339d7c>] ? _spin_unlock_bh+0x1c/0x20
[ 173.829703] [<ffffffffa069f4bc>] ? ppp_async_push+0x23c/0x4c0 [ppp_async]
[ 173.829710] [<ffffffffa00061dc>] ehci_irq+0x15c/0x1f0 [ehci_hcd]
[ 173.829715] [<ffffffff812493d8>] usb_hcd_irq+0x38/0x80
[ 173.829720] [<ffffffff810a5753>] handle_IRQ_event+0x63/0x1c0
[ 173.829725] [<ffffffff810a79b5>] handle_fasteoi_irq+0x85/0x110
[ 173.829729] [<ffffffff8100e1bf>] handle_irq+0x1f/0x30
[ 173.829733] [<ffffffff8100d7ae>] do_IRQ+0x6e/0xf0
[ 173.829738] [<ffffffff8100bc53>] ret_from_intr+0x0/0xa
[ 173.829740] <EOI> [<ffffffff810139ae>] ? mwait_idle+0x6e/0xe0
[ 173.829748] [<ffffffff8101396c>] ? mwait_idle+0x2c/0xe0
[ 173.829752] [<ffffffff8100a18f>] ? cpu_idle+0x4f/0x90
[ 173.829756] [<ffffffff813259d5>] ? rest_init+0x75/0x80
[ 173.829762] [<ffffffff81584d7f>] ? start_kernel+0x2ef/0x390
[ 173.829766] [<ffffffff81584271>] ? x86_64_start_reservations+0x81/0xc0
[ 173.829770] [<ffffffff81584386>] ? x86_64_start_kernel+0xd6/0x100
[ 173.829773] ------------[ cut here ]------------

[ 173.833556] WARNING: at kernel/mutex.c:214 __mutex_lock_slowpath+0x2d9/0x310()
[ 173.833556] Hardware name: PDSMi-LN4
[ 173.833556] Modules linked in: ppp_async crc_ccitt ipmi_si ipmi_devintf ipmi_msghandler ppp_generic slhc ipt_REDIRECT xt_tcpudp xt_conntrack xt_comment ipt_REJECT xt_multiport xt_policy xt_state nf_nat_ftp nf_conntrack_ftp iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables ipt_ULOG x_tables deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic cbc cryptd crypto_wq aes_x86_64 aes_generic xcbc rmd160 sha256_generic sha1_generic md5 hmac cryptomgr aead pcompress crypto_null crypto_blkcipher crypto_hash crypto_algapi af_key autofs4 lockd sunrpc 8021q bonding ipv6 reiserfs video backlight output sbs sbshc fan battery ac parport_pc lp parport nvram container hso rfkill usbhid sg e1000e piix thermal processor button thermal_sys i3000_edac rng_core iTCO_wdt tpm_tis tpm tpm_bios i2c_i801 edac_core i2c_core shpchp pci_hotplug pcspkr ahci pata_acpi ide_pci_generic ide_core ata_piix ata_generic libata sd_mod scsi_mod crc_t10dif raid1 dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: scsi_wait_scan]
[ 173.920445] Pid: 0, comm: swapper Not tainted 2.6.32lb.32 #1
[ 173.920445] Call Trace:
[ 173.920445] <IRQ> [<ffffffff813386c9>] ? __mutex_lock_slowpath+0x2d9/0x310
[ 173.920445] [<ffffffff81050207>] warn_slowpath_common+0x87/0xb0
[ 173.920445] [<ffffffff8105023f>] warn_slowpath_null+0xf/0x20
[ 173.920445] [<ffffffff813386c9>] __mutex_lock_slowpath+0x2d9/0x310
[ 173.920445] [<ffffffff81338727>] mutex_lock+0x27/0x50
[ 173.920445] [<ffffffff81211ca0>] tty_unthrottle+0x20/0x60
[ 173.920445] [<ffffffffa069fd01>] ppp_asynctty_receive+0x1d1/0x510 [ppp_async]
[ 173.920445] [<ffffffff8121409a>] flush_to_ldisc+0x16a/0x1d0
[ 173.920445] [<ffffffff81214155>] tty_flip_buffer_push+0x55/0x80
[ 173.920445] [<ffffffffa02c8c9c>] put_rxbuf_data+0xac/0x160 [hso]
[ 173.920445] [<ffffffffa02c8e01>] put_rxbuf_data_and_resubmit_bulk_urb+0x31/0x70 [hso]
[ 173.920445] [<ffffffffa02c8f5c>] hso_std_serial_read_bulk_callback+0x8c/0x1b0 [hso]
[ 173.920445] [<ffffffff812479be>] usb_hcd_giveback_urb+0x5e/0xe0
[ 173.920445] [<ffffffffa00012db>] ehci_urb_done+0x8b/0xe0 [ehci_hcd]
[ 173.920445] [<ffffffffa00013d4>] qh_completions+0xa4/0x4a0 [ehci_hcd]
[ 173.920445] [<ffffffffa0002272>] ehci_work+0x92/0x9c0 [ehci_hcd]
[ 173.920445] [<ffffffff81339d7c>] ? _spin_unlock_bh+0x1c/0x20
[ 173.920445] [<ffffffffa069f4bc>] ? ppp_async_push+0x23c/0x4c0 [ppp_async]
[ 173.920445] [<ffffffffa00061dc>] ehci_irq+0x15c/0x1f0 [ehci_hcd]
[ 173.920445] [<ffffffff812493d8>] usb_hcd_irq+0x38/0x80
[ 173.920445] [<ffffffff810a5753>] handle_IRQ_event+0x63/0x1c0
[ 173.920445] [<ffffffff810a79b5>] handle_fasteoi_irq+0x85/0x110
[ 173.920445] [<ffffffff8100e1bf>] handle_irq+0x1f/0x30
[ 173.920445] [<ffffffff8100d7ae>] do_IRQ+0x6e/0xf0
[ 173.920445] [<ffffffff8100bc53>] ret_from_intr+0x0/0xa
[ 173.920445] <EOI> [<ffffffff810139ae>] ? mwait_idle+0x6e/0xe0
[ 173.920445] [<ffffffff8101396c>] ? mwait_idle+0x2c/0xe0
[ 173.920445] [<ffffffff8100a18f>] ? cpu_idle+0x4f/0x90
[ 173.920445] [<ffffffff813259d5>] ? rest_init+0x75/0x80
[ 173.920445] [<ffffffff81584d7f>] ? start_kernel+0x2ef/0x390
[ 173.920445] [<ffffffff81584271>] ? x86_64_start_reservations+0x81/0xc0
[ 173.920445] [<ffffffff81584386>] ? x86_64_start_kernel+0xd6/0x100
[ 173.920445] ---[ end trace 21042040f8c942e6 ]---

It doesn't seem to be causing anything horrible, but it would be fine to have it fixed anyway :)
If I could provide further testing or information, I'll be glad to do so.
cheers!
nik


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Ing. Nikola CIPRICH
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