[BUG] Kernel Panic from AHD when power cycling external Disk/Array

[Sean Bruno]

Running a 29320R with CentOS 4.3 and 2.6.17.8 installed.  


Got this interesting BUG from 2.6.17.8 today.  Each time I reset my
external SCSI Disk connected to my 29320R the kernel throws this error
and locks up:

scsi0: Someone reset channel A
BUG: soft lockup detected on CPU#0!
 <c013258b> softlockup_tick+0x7f/0x8e  <c011e6e4> update_process_times
+0x35/0x57 <c0104eda> timer_interrupt+0x3d/0x60  <c0132698>
handle_IRQ_event+0x21/0x4a
 <c0132739> __do_IRQ+0x78/0xcb  <c0103eb5> do_IRQ+0x6b/0x7a
 <c0102c4a> common_interrupt+0x1a/0x20  <c02d3a2a>
_spin_unlock_irqrestore+0xa/c <e08d0481> ahd_linux_isr+0x173/0x17f
[aic79xx]  <c0132698> handle_IRQ_event+0xa <c0132739> __do_IRQ+0x78/0xcb
<c0103ea8> do_IRQ+0x5e/0x7a
 =======================
 <c0102c4a> common_interrupt+0x1a/0x20  <c011b5bc> __do_softirq
+0x2c/0x7d
 <c0103f8c> do_softirq+0x38/0x3f
 =======================
 <c0103eba> do_IRQ+0x70/0x7a  <c0102c4a> common_interrupt+0x1a/0x20
 <c0101150> mwait_idle+0x1a/0x2a  <c01010bf> cpu_idle+0x40/0x5c
 <c038c618> start_kernel+0x184/0x186



H/W specs:
(lspci)
00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM
Controller/Host-Hub Interface (rev 02)
00:01.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to AGP Controller
(rev 02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2
EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC
Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE
Controller (rev 02)
02:05.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001
Gigabit Ethernet Controller (rev 13)
02:09.0 VGA compatible controller: Silicon Integrated Systems [SiS]
315PRO PCI/AGP VGA Display Adapter
02:0c.0 SCSI storage controller: Adaptec ASC-29320A U320 (rev 10)



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