I'm not sure if this is the problem, but the tagging changes to
scsi_tcq.h may have altered the 53c700 driver's assumptions.
In one case it sets sdev->current_cmnd and then some of the
tagging calls would return it if the tag was SCSI_NO_TAG.
NCR_700_queuecommand_lck() does:
if ((hostdata->tag_negotiated & (1<<scmd_id(SCp))) &&
SCp->device->simple_tags) {
slot->tag = SCp->request->tag;
CDEBUG(KERN_DEBUG, SCp, "sending out tag %d, slot %p\n",
slot->tag, slot);
} else {
slot->tag = SCSI_NO_TAG;
/* must populate current_cmnd for scsi_host_find_tag to
work */
SCp->device->current_cmnd = SCp;
}
-Ewan
On Fri, 2016-06-10 at 22:25 +0200, Helge Deller wrote:
> On 10.06.2016 00:23, James Bottomley wrote:
> > On Thu, 2016-06-09 at 21:36 +0200, Helge Deller wrote:
> >> Hi James,
> >>
> >> I just tried Debian kernel 4.6.1-1 on my historic 715/64 machine, and it
> >> ran into this BUG() in the LASI scsi driver:
> >>
> >> scsi 0:0:6:0: no saved request for untagged cmd
> >>
> >> Any idea?
> >>
> >> Helge
> >>
> >> [ 0.000000] Linux version 4.6.0-1-parisc (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version 5.4.0 20160603 (Debian 5.4.0-3) ) #1 Debian 4.6.1-1 (2016-06-06)
> >> ...
> >> [ 0.000000] Determining PDC firmware type: Snake.
> >> [ 0.000000] model 000060a0 00000481 00000000 00000000 773c7d2c 00000000 00000004 00000072 00000072
> >> [ 0.000000] vers 0000000c
> >> [ 0.000000] model 9000/715
> >> [ 0.000000] Total Memory: 160 MB
> >> ...
> >> [ 43.180000] SCSI subsystem initialized
> >> [ 45.076000] 53c700: Version 2.8 By James.Bottomley@xxxxxxxxxxxxxxxxxxxxx
> >> [ 45.156000] scsi0: 53c710 rev 2
> >> [ 46.204000] scsi host0: LASI SCSI 53c700
> >> [ 58.268000] scsi 0:0:6:0: no saved request for untagged cmd
> >> [ 58.336000] ------------[ cut here ]------------
> >> [ 58.392000] kernel BUG at /build/linux-XAODSw/linux-4.6.1/drivers/scsi/53c700.c:1129!
> >> [ 58.484000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.6.0-1-parisc #1 Debian 4.6.1-1
> >> [ 58.580000] task: 1083cdd8 ti: 107b1000 task.ti: 107b1000
> >> [ 58.644000]
> >> [ 58.660000] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
> >> [ 58.716000] PSW: 00000000000001001111111100001110 Not tainted
> >> [ 58.788000] r00-03 0004ff0e 0084e388 00a8ea8c 107ba400
> >> [ 58.848000] r04-07 00000000 00000000 15b88cc0 00000006
> >> [ 58.912000] r08-11 198ca400 000000ff 00000020 00000000
> >> [ 58.976000] r12-15 000000ff 00001003 10801020 00000001
> >> [ 59.036000] r16-19 107b1240 00000002 000000ff 00000001
> >> [ 59.100000] r20-23 00000001 0000000e 0084f388 00000000
> >> [ 59.164000] r24-27 107ba500 0083b540 1021a7a4 107b5020
> >> [ 59.224000] r28-31 00000000 00000040 107ba480 104d52bc
> >> [ 59.288000] sr00-03 00000000 00000000 00000000 0000000d
> >> [ 59.352000] sr04-07 00000000 00000000 00000000 00000000
> >> [ 59.416000]
> >> [ 59.432000] IASQ: 00000000 00000000 IAOQ: 00a8ea8c 00a8ea90
> >> [ 59.500000] IIR: 03ffe01f ISR: 0000000d IOR: 00a8ea90
> >> [ 59.564000] CPU: 0 CR30: 107b1000 CR31: f00effff
> >> [ 59.632000] ORIG_R28: 10855e80
> >> [ 59.668000] IAOQ[0]: process_script_interrupt+0x13ec/0x16a4 [53c700]
> >> [ 59.748000] IAOQ[1]: process_script_interrupt+0x13f0/0x16a4 [53c700]
> >> [ 59.824000] RP(r2): process_script_interrupt+0x13ec/0x16a4 [53c700]
> >> [ 59.900000] Backtrace:
> >> [ 59.928000] [<00a8ea8c>] process_script_interrupt+0x13ec/0x16a4 [53c700]
> >> [ 60.012000]
> >> [ 60.028000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.6.0-1-parisc #1 Debian 4.6.1-1
> >> [ 60.120000] Backtrace:
> >> [ 60.148000] [<1015bffc>] show_stack+0x3c/0x50
> >> [ 60.204000] [<10425d40>] dump_stack+0x28/0x38
> >> [ 60.256000] [<1015c180>] die_if_kernel+0x134/0x20c
> >> [ 60.316000] [<1015cd34>] handle_interruption+0x804/0x828
> >> [ 60.380000]
> >> [ 60.400000] Kernel panic - not syncing: Fatal exception in interrupt
> >> [ 60.400000] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
> >
> > It looks like either an unsolicited reselection or possibly a spurious
> > interrupt left over from something. Can you define NCR_700_DEBUG in
> > drivers/scsi/53c700.h and see what it says?
>
> I enabled NCR_700_DEBUG and NCR_700_TAG_DEBUG.
> This is from vanilla kernel 4.6:
>
> [ 8.700000] Uniform Multi-Platform E-IDE driver
> [ 8.760000] ide-gd driver 1.18
> [ 8.790000] ide-cd driver 5.00
> [ 8.860000] script, patching MessageLocation at 31 to 0x09f684b0
> [ 8.930000] script, patching StatusAddress at 281 to 0x09f684d0
> [ 9.000000] script, patching ReceiveMsgAddress at 15 to 0x09f684c0
> [ 9.080000] script, patching ReceiveMsgAddress at 19 to 0x09f684c0
> [ 9.150000] script, patching ReceiveMsgAddress at 41 to 0x09f684c0
> [ 9.230000] script, patching ReceiveMsgAddress at 49 to 0x09f684c0
> [ 9.300000] script, patching ReceiveMsgAddress at 55 to 0x09f684c0
> [ 9.370000] script, patching ReceiveMsgAddress at 71 to 0x09f684c0
> [ 9.450000] script, patching ReceiveMsgAddress at 77 to 0x09f684c0
> [ 9.520000] script, patching ReceiveMsgAddress at 83 to 0x09f684c0
> [ 9.600000] script, patching ReceiveMsgAddress at 89 to 0x09f684c0
> [ 9.670000] script, patching ReceiveMsgAddress at 95 to 0x09f684c0
> [ 9.750000] script, patching ReceiveMsgAddress at 137 to 0x09f684c0
> [ 9.830000] script, patching ReceiveMsgAddress at 147 to 0x09f684c0
> [ 9.900000] script, patching ReceiveMsgAddress at 177 to 0x09f684c0
> [ 9.980000] script, patching ReceiveMsgAddress at 215 to 0x09f684c0
> [ 10.050000] script, patching ReceiveMsgAddress at 251 to 0x09f684c0
> [ 10.130000] script, patching ReceiveMsgAddress at 285 to 0x09f684c0
> [ 10.210000] 53c700: Version 2.8 By James.Bottomley@xxxxxxxxxxxxxxxxxxxxx
> [ 10.290000] scsi0: 53c710 rev 2
> [ 11.330000] 53c700: sync 1 async 2
> [ 11.370000] scsi host0: LASI SCSI 53c700
> [ 11.430000] 53c700: scsi0, command
> [ 11.430000] scsi 0:0:0:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 11.430000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 11.430000] SETTING 09f684e8 to 90080000
> [ 11.430000] script, patching short field MessageCount at 30 to 0xe000006
> [ 11.430000] script, patching ID field Device_ID at 0 to 0x41010000
> [ 11.430000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 11.430000] script, patching short field CommandCount at 120 to 0xa000006
> [ 11.430000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 11.430000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 32.090000] scsi 0:0:0:0: tag#0 abort command
> [ 32.140000] scsi 0:0:0:0: tag#0 New error handler wants BUS reset, cmd 19f72d20
> [ 32.140000]
> [ 32.240000] scsi 0:0:0:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 32.320000] scsi0: istat 02 sstat0 02 dstat 00 dsp 0002[09f68008] dsps 0x9f68020
> [ 32.320000] scsi0: Bus Reset detected, executing command 19f72d20, slot 000084e0, dsp 09f68008[0008]
> [ 32.320000] failing command because of reset, slot 000084e0, cmnd 19f72d20
> [ 32.320000] 53c700: sync 1 async 2
> [ 42.670000] 53c700: scsi0, command
> [ 42.670000] scsi 0:0:0:0: tag#0 CDB: opcode=0x0 00 00 00 00 00 00
> [ 42.670000] script, patching short field MessageCount at 30 to 0xe000006
> [ 42.670000] script, patching ID field Device_ID at 0 to 0x41010000
> [ 42.670000] script, patching CommandAddress at 121 to 0x09fa03f4
> [ 42.670000] script, patching short field CommandCount at 120 to 0xa000006
> [ 42.670000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 42.670000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 43.260000] scsi 0:0:0:0: tag#0 abort command
> [ 43.310000] scsi0: istat 02 sstat0 02 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 43.310000] scsi0: Bus Reset detected, executing command 19f72d20, slot 000084e0, dsp 09f68010[0010]
> [ 43.310000] failing command because of reset, slot 000084e0, cmnd 19f72d20
> [ 43.310000] 53c700: sync 1 async 2
> [ 43.650000] scsi 0:0:0:0: tag#0 New error handler wants BUS reset, cmd 19f72d20
> [ 43.650000]
> [ 43.760000] scsi 0:0:0:0: tag#0 CDB: opcode=0x0 00 00 00 00 00 00
> [ 43.830000] scsi0: istat 02 sstat0 02 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 43.830000] scsi0: Bus Reset detected, executing command (null), slot (null), dsp 09f68010[0010]
> [ 43.830000] 53c700: sync 1 async 2
> [ 54.110000] scsi 0:0:0:0: tag#0 New error handler wants HOST reset
> [ 54.110000]
> [ 54.200000] scsi 0:0:0:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 54.270000] 53c700: sync 1 async 2
> [ 54.270000] timer_interrupt(CPU 0): delayed! cycles 3F77F5E rem 20A2 next/now 90731E60/9072FDBE
> [ 65.430000] 53c700: scsi0, command
> [ 65.430000] scsi 0:0:0:0: tag#0 CDB: opcode=0x0 00 00 00 00 00 00
> [ 65.430000] script, patching short field MessageCount at 30 to 0xe000006
> [ 65.430000] script, patching ID field Device_ID at 0 to 0x41010000
> [ 65.430000] script, patching CommandAddress at 121 to 0x09fa03f4
> [ 65.430000] script, patching short field CommandCount at 120 to 0xa000006
> [ 65.430000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 65.430000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 66.020000] scsi 0:0:0:0: tag#0 abort command
> [ 66.070000] scsi0: istat 02 sstat0 02 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 66.070000] scsi0: Bus Reset detected, executing command 19f72d20, slot 000084e0, dsp 09f68010[0010]
> [ 66.070000] failing command because of reset, slot 000084e0, cmnd 19f72d20
> [ 66.070000] 53c700: sync 1 async 2
> [ 66.410000] scsi 0:0:0:0: tag#0 New error handler wants BUS reset, cmd 19f72d20
> [ 66.410000]
> [ 66.520000] scsi 0:0:0:0: tag#0 CDB: opcode=0x0 00 00 00 00 00 00
> [ 66.590000] scsi0: istat 02 sstat0 02 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 66.590000] scsi0: Bus Reset detected, executing command (null), slot (null), dsp 09f68010[0010]
> [ 66.590000] 53c700: sync 1 async 2
> [ 76.870000] scsi 0:0:0:0: Device offlined - not ready after error recovery
> [ 76.950000] 53c700: scsi0, command
> [ 76.950000] scsi 0:0:1:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 76.950000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 76.950000] SETTING 09f684e8 to 90080000
> [ 76.950000] script, patching short field MessageCount at 30 to 0xe000006
> [ 76.950000] script, patching ID field Device_ID at 0 to 0x41020000
> [ 76.950000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 76.950000] script, patching short field CommandCount at 120 to 0xa000006
> [ 76.950000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 76.950000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 77.970000] scsi0: istat 02 sstat0 20 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 77.970000] scsi0: (1:0) selection timeout
> [ 78.110000] 53c700: scsi0, command
> [ 78.110000] scsi 0:0:2:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 78.110000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 78.110000] SETTING 09f684e8 to 90080000
> [ 78.110000] script, patching short field MessageCount at 30 to 0xe000006
> [ 78.110000] script, patching ID field Device_ID at 0 to 0x41040000
> [ 78.110000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 78.110000] script, patching short field CommandCount at 120 to 0xa000006
> [ 78.110000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 78.110000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 79.120000] scsi0: istat 02 sstat0 20 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 79.120000] scsi0: (2:0) selection timeout
> [ 79.270000] 53c700: scsi0, command
> [ 79.270000] scsi 0:0:3:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 79.270000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 79.270000] SETTING 09f684e8 to 90080000
> [ 79.270000] script, patching short field MessageCount at 30 to 0xe000006
> [ 79.270000] script, patching ID field Device_ID at 0 to 0x41080000
> [ 79.270000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 79.270000] script, patching short field CommandCount at 120 to 0xa000006
> [ 79.270000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 79.270000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 80.280000] scsi0: istat 02 sstat0 20 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 80.280000] scsi0: (3:0) selection timeout
> [ 80.420000] 53c700: scsi0, command
> [ 80.420000] scsi 0:0:4:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 80.420000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 80.420000] SETTING 09f684e8 to 90080000
> [ 80.420000] script, patching short field MessageCount at 30 to 0xe000006
> [ 80.420000] script, patching ID field Device_ID at 0 to 0x41100000
> [ 80.420000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 80.420000] script, patching short field CommandCount at 120 to 0xa000006
> [ 80.420000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 80.420000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 81.440000] scsi0: istat 02 sstat0 20 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 81.440000] scsi0: (4:0) selection timeout
> [ 81.580000] 53c700: scsi0, command
> [ 81.580000] scsi 0:0:5:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 81.580000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 81.580000] SETTING 09f684e8 to 90080000
> [ 81.580000] script, patching short field MessageCount at 30 to 0xe000006
> [ 81.580000] script, patching ID field Device_ID at 0 to 0x41200000
> [ 81.580000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 81.580000] script, patching short field CommandCount at 120 to 0xa000006
> [ 81.580000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 81.580000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 82.590000] scsi0: istat 02 sstat0 20 dstat 00 dsp 0004[09f68010] dsps 0x9f68460
> [ 82.590000] scsi0: (5:0) selection timeout
> [ 82.740000] 53c700: scsi0, command
> [ 82.740000] scsi 0:0:6:0: tag#0 CDB: opcode=0x12 12 00 00 00 24 00
> [ 82.740000] scatter block 0: move 36[09000024] from 0x9d66100
> [ 82.740000] SETTING 09f684e8 to 90080000
> [ 82.740000] script, patching short field MessageCount at 30 to 0xe000006
> [ 82.740000] script, patching ID field Device_ID at 0 to 0x41400000
> [ 82.740000] script, patching CommandAddress at 121 to 0x09c0d3c8
> [ 82.740000] script, patching short field CommandCount at 120 to 0xa000006
> [ 82.740000] script, patching SGScriptStartAddress at 191 to 0x09f684e0
> [ 82.740000] script, patching SGScriptStartAddress at 207 to 0x09f684e0
> [ 83.440000] scsi0: istat 09 sstat0 00 dstat 84 dsp 00ba[09f682e8] dsps 0x250
> [ 83.440000] scsi0: (6:0) ====>SCRIPT INTERRUPT<====
> [ 83.440000] scsi0 (6:0): message before command phase: 01 03 01 00 00
> [ 83.440000] Attempting to resume at 9f682e8
> [ 83.710000] scsi0: istat 01 sstat0 00 dstat 84 dsp 00ac[09f682b0] dsps 0x380
> [ 83.710000] scsi0: (6:0) ====>SCRIPT INTERRUPT<====
> [ 83.710000] scsi0: (6:0), DISCONNECTED (3) after command phase
> [ 83.920000] scsi0: istat 0a sstat0 10 dstat 00 dsp 00ac[09f682b0] dsps 0x380
> [ 83.920000] scsi0: Reselected by 6
> [ 83.920000] Attempting to resume at 9f68038
> [ 84.100000] scsi0: istat 09 sstat0 00 dstat 84 dsp 0012[09f68048] dsps 0x1003
> [ 84.100000] scsi0: (255:255) ====>SCRIPT INTERRUPT<====
> [ 84.100000] scsi0: (6:0) RESELECTED!
> [ 84.100000] scsi 0:0:6:0: no saved request for untagged cmd
> [ 84.360000] ------------[ cut here ]------------
> [ 84.410000] kernel BUG at /home/cvs/parisc/git-kernel/linus-linux-2.6/drivers/scsi/53c700.c:1129!
> [ 84.520000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.6.0-32bit+ #323
> [ 84.590000] task: 10732288 ti: 1072b000 task.ti: 1072b000
> [ 84.660000]
> [ 84.680000] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
> [ 84.730000] PSW: 00000000000001001111111100001110 Not tainted
> [ 84.800000] r00-03 0004ff0e 1077a24c 10438288 10735940
> [ 84.860000] r04-07 19f63d80 00000000 09f68048 00000006
> [ 84.930000] r08-11 19d5e000 19fa6c00 00000020 10669d30
> [ 84.990000] r12-15 00000084 000000ff 00000000 00200000
> [ 85.050000] r16-19 10735280 00000002 00000000 00000001
> [ 85.110000] r20-23 00000001 0000000e 1077b24c 103cfbac
> [ 85.180000] r24-27 00000000 0000000e 00000000 1072f030
> [ 85.240000] r28-31 00000000 00000119 107359c0 103d2adc
> [ 85.300000] sr00-03 00000000 00000000 00000000 00000000
> [ 85.360000] sr04-07 00000000 00000000 00000000 00000000
> [ 85.430000]
> [ 85.450000] IASQ: 00000000 00000000 IAOQ: 10438288 1043828c
> [ 85.510000] IIR: 03ffe01f ISR: 00000000 IOR: 107359c0
> [ 85.580000] CPU: 0 CR30: 1072b000 CR31: f00effff
> [ 85.640000] ORIG_R28: 00000000
> [ 85.680000] IAOQ[0]: process_script_interrupt+0x7ac/0xdd8
> [ 85.750000] IAOQ[1]: process_script_interrupt+0x7b0/0xdd8
> [ 85.810000] RP(r2): process_script_interrupt+0x7ac/0xdd8
> [ 85.880000] Backtrace:
> [ 85.900000] [<10439f1c>] NCR_700_intr+0xcf8/0x12c0
> [ 85.960000] [<101a2c00>] handle_irq_event_percpu+0x80/0x178
> [ 86.030000] [<101a2d44>] handle_irq_event+0x4c/0x84
> [ 86.090000] [<101a5894>] handle_simple_irq+0x88/0xa8
> [ 86.150000] [<101a23f4>] generic_handle_irq+0x2c/0x44
> [ 86.210000] [<10394924>] gsc_asic_intr+0x80/0xb4
> [ 86.270000] [<101a2c00>] handle_irq_event_percpu+0x80/0x178
> [ 86.340000] [<101a61dc>] handle_percpu_irq+0x5c/0x88
> [ 86.400000] [<101a23f4>] generic_handle_irq+0x2c/0x44
> [ 86.460000] [<10156688>] execute_on_irq_stack+0x40/0x70
> [ 86.520000] [<10156dcc>] do_cpu_irq_mask+0x19c/0x1e4
> [ 86.580000] [<1014a068>] intr_return+0x0/0xc
> [ 86.630000] [<101ac1f8>] hrtimer_run_queues+0x1f4/0x240
> [ 86.700000]
> [ 86.720000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.6.0-32bit+ #323
> [ 86.790000] Backtrace:
> [ 86.820000] [<1015571c>] show_stack+0x18/0x28
> [ 86.870000] [<10351234>] dump_stack+0x28/0x38
> [ 86.930000] [<101558a8>] die_if_kernel+0x160/0x1d4
> [ 86.990000] [<10155e08>] handle_interruption+0x250/0x754
> [ 87.050000] [<103e6c08>] dev_vprintk_emit+0x194/0x1c8
> [ 87.110000] [<1043828c>] process_script_interrupt+0x7b0/0xdd8
> [ 87.180000] [<10438288>] process_script_interrupt+0x7ac/0xdd8
> [ 87.250000] [<10439f1c>] NCR_700_intr+0xcf8/0x12c0
> [ 87.310000] [<101a2c00>] handle_irq_event_percpu+0x80/0x178
> [ 87.380000] [<101a2d44>] handle_irq_event+0x4c/0x84
> [ 87.440000] [<101a5894>] handle_simple_irq+0x88/0xa8
> [ 87.500000] [<101a23f4>] generic_handle_irq+0x2c/0x44
> [ 87.560000] [<10394924>] gsc_asic_intr+0x80/0xb4
> [ 87.620000] [<101a2c00>] handle_irq_event_percpu+0x80/0x178
> [ 87.680000] [<101a61dc>] handle_percpu_irq+0x5c/0x88
> [ 87.740000] [<101a23f4>] generic_handle_irq+0x2c/0x44
> [ 87.800000]
> [ 87.820000] Kernel panic - not syncing: Fatal exception in interrupt
>
>
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