Kernel panic with 2.6.15-rc7 + libata1 patch

[Ralf Müller <ralf@bj-ig.de>]

Had the following kernel panic with 2.6.15-rc7 + libata1 2.6.15-rc6 
patch (http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/).
Ocurred when calling "hddtemp" on a SATA device which has been in 
standby. Maybe someone is interesed:
Dec 31 12:45:08 DatenGrab kernel: ATA: abnormal status 0xFF on port 
0xE02A821CDec 31 12:45:11 DatenGrab kernel: ata3: unknown timeout, cmd 
0xb0 stat 0xffDec 31 12:45:11 DatenGrab kernel: ata3: translated ATA 
stat/err 0xff/00 to SCSI SK/ASC/ASCQ 0xb/47/00Dec 31 12:45:11 DatenGrab 
kernel: ata3: status=0xff { Busy }Dec 31 12:45:11 DatenGrab kernel: 
Assertion failed! qc != 
NULL,drivers/scsi/libata-core.c,ata_pio_block,line=3216Dec 31 12:45:11 
DatenGrab kernel: e02d9a3e
Dec 31 12:45:11 DatenGrab kernel: Modules linked in: iptable_filter 
ip_tables w83627hf hwmon_vid hwmon eeprom i2c_isa nfsd edd ipv6 button 
battery ac af_packet xfs exportfs reiserfs ohci1394 ieee1394 sk98lin 
generic i2c_i801 i2c_core i8xx_tco shpchp pci_hotplug intel_agp agpgart 
uhci_hcd raid5 xor parport_pc lp parport sata_promise libata dm_mod sg 
skge ohci_hcd ehci_hcd usb_storage usbcore fan thermal processor piix 
sd_mod scsi_mod ide_disk ide_core
Dec 31 12:45:11 DatenGrab kernel: CPU:    0Dec 31 12:45:11 DatenGrab 
kernel: EIP:    0060:[<e02d9a3e>]    Not tainted VLI
Dec 31 12:45:11 DatenGrab kernel: EFLAGS: 00010292 
(2.6.15-rc6-default) Dec 31 12:45:11 DatenGrab kernel: EIP is at 
ata_pio_block+0xb9/0xfd [libata]
Dec 31 12:45:11 DatenGrab kernel: eax: 00000056   ebx: c14b5284   ecx: 
00000000   edx: 00000000
Dec 31 12:45:11 DatenGrab kernel: esi: 58894f50   edi: 00000000   ebp: 
c14b5284   esp: de3a7f70
Dec 31 12:45:11 DatenGrab kernel: ds: 007b   es: 007b   ss: 0068
Dec 31 12:45:11 DatenGrab kernel: Process ata/0 (pid: 2181, 
threadinfo=de3a6000 task=de371a90)
Dec 31 12:45:11 DatenGrab kernel: Stack: c14b5284 def063c0 00000287 
e02d9b00 c14b583c c01230a6 e02d9ae3 00000001
Dec 31 12:45:11 DatenGrab kernel:        00000000 00000000 00010000 
00000000 00000000 de371a90 c01150bc 00100100
Dec 31 12:45:11 DatenGrab kernel:        00200200 ffffffff ffffffff 
de3a6000 de0dbf54 def063c0 c0122f67 c0125c8f
Dec 31 12:45:11 DatenGrab kernel: Call Trace:
Dec 31 12:45:11 DatenGrab kernel:  [<e02d9b00>] ata_pio_task+0x1d/0x54 
[libata]
Dec 31 12:45:11 DatenGrab kernel:  [<c01230a6>] worker_thread+0x13f/0x19d
Dec 31 12:45:11 DatenGrab kernel:  [<e02d9ae3>] ata_pio_task+0x0/0x54 
[libata]
Dec 31 12:45:11 DatenGrab kernel:  [<c01150bc>] 
default_wake_function+0x0/0xc
Dec 31 12:45:11 DatenGrab kernel:  [<c0122f67>] worker_thread+0x0/0x19d
Dec 31 12:45:11 DatenGrab kernel:  [<c0125c8f>] kthread+0x63/0x8f
Dec 31 12:45:11 DatenGrab kernel:  [<c0125c2c>] kthread+0x0/0x8f
Dec 31 12:45:11 DatenGrab kernel:  [<c0101281>] kernel_thread_helper+0x5/0xb
Dec 31 12:45:11 DatenGrab kernel: Code: 89 df 81 c7 d4 04 00 00 75 21 68 
90 0c 00 00 68 fb cd 2d e0 68 ef cf 2d e0 68 b0 d5 2d e0 68 61 d0 2d e0 
e8 19 e1 e3 df 83 c4 14 <8a> 47 14 83 e8 05 3c 02 77 1b 83 e6 08 75 0c 
c7 83 e4 05 00 00
Dec 31 12:45:14 DatenGrab kernel:  <3>ata5: unknown timeout, cmd 0xb0 
stat 0x58
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