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Wayne Boyer 7dacb64f49 [SCSI] ipr: improve interrupt service routine performance 
During performance testing on P7 machines it was observed that the interrupt
service routine was doing unnecessary MMIO operations.

This patch rearranges the logic of the routine and moves some of the code out
of the main routine.  The result is that there are now fewer MMIO operations in
the performance path of the code.

As a result of the above change, an existing condition was exposed where the
driver could get an "unexpected" hrrq interrupt.  The original code would flag
the interrupt as unexpected and then reset the adapter.  After further analysis
it was confirmed that this condition can occasionally occur and that the
interrupt can safely be ignored.  Additional code in this patch detects this
condition, clears the interrupt and allows the driver to continue without
resetting the adapter.

Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
 		2011-05-01 10:48:53 -05:00
..
aacraid Fix common misspellings 2011-03-31 11:26:23 -03:00
aic7xxx Fix common misspellings 2011-03-31 11:26:23 -03:00
aic7xxx_old Fix common misspellings 2011-03-31 11:26:23 -03:00
aic94xx Fix common misspellings 2011-03-31 11:26:23 -03:00
arcmsr Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-03-17 17:54:40 -07:00
arm Fix common misspellings 2011-03-31 11:26:23 -03:00
be2iscsi [SCSI] be2iscsi: Fix for proper setting of FW 2011-04-15 16:46:17 -05:00
bfa Fix common misspellings 2011-03-31 11:26:23 -03:00
bnx2fc [SCSI] bnx2fc: introduce missing kfree 2011-05-01 10:18:31 -05:00
bnx2i Fix common misspellings 2011-03-31 11:26:23 -03:00
cxgbi Fix common misspellings 2011-03-31 11:26:23 -03:00
device_handler [SCSI] scsi_dh_rdac : decide whether to send mode select based on operating mode 2011-05-01 10:47:41 -05:00
dpt Fix common misspellings 2011-03-31 11:26:23 -03:00
fcoe [SCSI] fcoe: have fcoe log off and lport destroy before ndo_fcoe_disable 2011-05-01 10:20:59 -05:00
fnic Fix common misspellings 2011-03-31 11:26:23 -03:00
ibmvscsi [SCSI] ibmvfc: Improve ibmvfc_async_desc memory layout 2010-12-21 12:24:49 -06:00
libfc [SCSI] libfc: rec tov value and REC_TOV_CONST units usages is incorrect 2011-05-01 10:20:56 -05:00
libsas Fix common misspellings 2011-03-31 11:26:23 -03:00
lpfc [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
megaraid [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
mpt2sas [SCSI] mpt2sas : WarpDrive New product SSS6200 support added 2011-05-01 10:36:54 -05:00
mvsas [SCSI] mvsas: Add support for HighPoint RR27xx series HBA 2011-03-23 11:35:59 -05:00
osd [SCSI] libosd: osd_req_read_sg, optimize the single entry case 2011-01-24 12:06:31 -06:00
pcmcia Fix common misspellings 2011-03-31 11:26:23 -03:00
pm8001 Fix common misspellings 2011-03-31 11:26:23 -03:00
qla2xxx [SCSI] qla2xxx: Update version number to 8.03.07.03-k. 2011-05-01 10:15:51 -05:00
qla4xxx [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
sym53c8xx_2 Fix common misspellings 2011-03-31 11:26:23 -03:00
.gitignore
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3w-9xxx.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
3w-9xxx.h Fix common misspellings 2011-03-31 11:26:23 -03:00
3w-sas.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
3w-sas.h [SCSI] 3w-sas: Add new driver for LSI 3ware 9750 2009-12-04 12:00:51 -06:00
3w-xxxx.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
3w-xxxx.h Fix common misspellings 2011-03-31 11:26:23 -03:00
53c700.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
53c700.h
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53c700.scr Fix common misspellings 2011-03-31 11:26:23 -03:00
53c700_d.h_shipped Fix common misspellings 2011-03-31 11:26:23 -03:00
BusLogic.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
BusLogic.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
FlashPoint.c Fix common misspellings 2011-03-31 11:26:23 -03:00
Kconfig [SCSI] bnx2fc: Broadcom FCoE offload driver 2011-02-28 18:40:27 -06:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-03-17 17:54:40 -07:00
NCR53c406a.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
NCR5380.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
NCR_D700.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
NCR_D700.h
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NCR_Q720.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
NCR_Q720.h
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a100u2w.c Merge branch 'master' into for-next 2010-12-22 18:57:02 +01:00
a100u2w.h
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a2091.c m68k/scsi: a2091 - Do not use legacy Scsi_Host.base 2010-05-26 19:51:08 +02:00
a2091.h m68k/scsi: a2091 - Kill a2091_scsiregs typedef 2010-05-26 19:51:07 +02:00
a3000.c m68k/scsi: a3000 - Do not use legacy Scsi_Host.base 2010-05-26 19:51:08 +02:00
a3000.h m68k/scsi: a3000 - Kill a3000_scsiregs typedef 2010-05-26 19:51:07 +02:00
a4000t.c m68k: amiga - A4000T SCSI platform device conversion 2010-05-26 19:51:09 +02:00
advansys.c Fix common misspellings 2011-03-31 11:26:23 -03:00
aha152x.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aha152x.h
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aha1542.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aha1542.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aha1740.c Fix common misspellings 2011-03-31 11:26:23 -03:00
aha1740.h
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aic7xxx_old.c Fix common misspellings 2011-03-31 11:26:23 -03:00
atari_NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
atari_scsi.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
atari_scsi.h
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atp870u.c Fix common misspellings 2011-03-31 11:26:23 -03:00
atp870u.h
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bvme6000_scsi.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ch.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
constants.c [SCSI] Log thin provisioning threshold event 2011-04-15 16:29:25 -05:00
dc395x.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
dc395x.h Fix common misspellings 2011-03-31 11:26:23 -03:00
dmx3191d.c tree-wide: fix misspelling of "definition" in comments 2009-12-04 23:41:47 +01:00
dpt_i2o.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
dpti.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
dtc.c
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dtc.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
eata.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
eata_generic.h
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eata_pio.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
eata_pio.h
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esp_scsi.c [SCSI] esp, scsi_tgt_lib, fcoe: use list_move() instead of list_del()/list_add() combination 2011-05-01 10:20:10 -05:00
esp_scsi.h
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fd_mcs.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
fdomain.c Fix common misspellings 2011-03-31 11:26:23 -03:00
fdomain.h
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g_NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
g_NCR5380.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
g_NCR5380_mmio.c
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gdth.c [SCSI] gdth: Add missing call to gdth_ioctl_free 2010-12-31 09:50:09 -06:00
gdth.h Fix common misspellings 2011-03-31 11:26:23 -03:00
gdth_ioctl.h [SCSI] gdth: Convert to use regular kernel types. 2010-01-18 10:48:16 -06:00
gdth_proc.c [SCSI] gdth: Add missing call to gdth_ioctl_free 2010-12-31 09:50:09 -06:00
gdth_proc.h [SCSI] gdth: Convert to use regular kernel types. 2010-01-18 10:48:16 -06:00
gvp11.c Fix common misspellings 2011-03-31 11:26:23 -03:00
gvp11.h m68k: amiga - GVP Series II SCSI zorro_driver conversion 2010-05-26 19:51:08 +02:00
hosts.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-10-22 19:36:42 -07:00
hpsa.c [SCSI] hpsa: export resettable host attribute 2011-03-14 18:44:41 -05:00
hpsa.h [SCSI] hpsa: make hpsa.hpsa_simple_mode=1 module parameter actually work 2011-02-18 12:32:30 -06:00
hpsa_cmd.h [SCSI] hpsa: Inform controller we are using 32-bit tags. 2011-02-18 12:33:52 -06:00
hptiop.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
hptiop.h [SCSI] hptiop: Add RR44xx adapter support 2009-10-02 09:45:22 -05:00
ibmmca.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
imm.c Fix common misspellings 2011-03-31 11:26:23 -03:00
imm.h
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in2000.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
in2000.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
initio.c Fix common misspellings 2011-03-31 11:26:23 -03:00
initio.h Fix common misspellings 2011-03-31 11:26:23 -03:00
ipr.c [SCSI] ipr: improve interrupt service routine performance 2011-05-01 10:48:53 -05:00
ipr.h [SCSI] ipr: fix synchronous request flags for better performance 2011-05-01 10:16:44 -05:00
ips.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ips.h Fix common misspellings 2011-03-31 11:26:23 -03:00
iscsi_boot_sysfs.c [SCSI] iscsi boot: mv iscsi_boot_sysfs to drivers/scsi 2010-08-06 10:45:07 -05:00
iscsi_tcp.c Fix common misspellings 2011-03-31 11:26:23 -03:00
iscsi_tcp.h [SCSI] iscsi_tcp: use iscsi_conn_get_addr_param libiscsi function 2011-02-24 12:41:10 -05:00
jazz_esp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
lasi700.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
libiscsi.c [SCSI] libiscsi: add helper to convert addr to string 2011-02-24 12:41:08 -05:00
libiscsi_tcp.c [SCSI] libiscsi_tcp: use kmap in xmit path 2011-03-23 11:36:58 -05:00
libsrp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mac53c94.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
mac53c94.h
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mac_esp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mac_scsi.c
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mac_scsi.h
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megaraid.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
megaraid.h Fix common misspellings 2011-03-31 11:26:23 -03:00
mesh.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
mesh.h
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mvme16x_scsi.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mvme147.c m68k/scsi: mvme147 - Kill obsolete HOSTS_C logic 2010-05-26 19:51:07 +02:00
mvme147.h [SCSI] mvme147: Reindentation 2010-05-02 15:55:03 -04:00
ncr53c8xx.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
ncr53c8xx.h
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nsp32.c Fix common misspellings 2011-03-31 11:26:23 -03:00
nsp32.h Fix common misspellings 2011-03-31 11:26:23 -03:00
nsp32_debug.c
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nsp32_io.h
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osst.c Fix common misspellings 2011-03-31 11:26:23 -03:00
osst.h Fix common misspellings 2011-03-31 11:26:23 -03:00
osst_detect.h
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osst_options.h
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pas16.c
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pas16.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
pmcraid.c Fix common misspellings 2011-03-31 11:26:23 -03:00
pmcraid.h Fix common misspellings 2011-03-31 11:26:23 -03:00
ppa.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
ppa.h
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ps3rom.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
qla1280.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
qla1280.h
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qlogicfas.c
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qlogicfas408.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
qlogicfas408.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
qlogicpti.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
qlogicpti.h of/device: Replace struct of_device with struct platform_device 2010-08-06 09:25:50 -06:00
raid_class.c [SCSI] raid_attrs: fix dependency problems 2010-03-03 21:17:06 +05:30
script_asm.pl
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scsi.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
scsi.h
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scsi_debug.c Fix common misspellings 2011-03-31 11:26:23 -03:00
scsi_devinfo.c [SCSI] Add scsi_dev_info_list_del_keyed() 2011-01-24 12:01:07 -06:00
scsi_error.c [SCSI] Log thin provisioning threshold event 2011-04-15 16:29:25 -05:00
scsi_ioctl.c [SCSI] add scsi target reset support to scsi ioctl 2009-12-04 12:01:33 -06:00
scsi_lib.c Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block 2011-03-24 10:16:26 -07:00
scsi_lib_dma.c [SCSI] scsi_lib_dma: fix bug with dma maps on nested scsi objects 2009-12-04 12:01:30 -06:00
scsi_logging.h
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scsi_module.c
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scsi_netlink.c Fix common misspellings 2011-03-31 11:26:23 -03:00
scsi_pm.c [SCSI] implement runtime Power Management 2010-07-28 09:07:50 -05:00
scsi_priv.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-03-17 17:54:40 -07:00
scsi_proc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
scsi_sas_internal.h [SCSI] scsi_transport_sas: add support for transport layer retries (TLR) 2010-02-08 17:15:19 -06:00
scsi_scan.c driver core: remove CONFIG_SYSFS_DEPRECATED_V2 but keep it for block devices 2010-10-22 10:16:43 -07:00
scsi_sysctl.c sysctl: Drop & in front of every proc_handler. 2009-11-18 08:37:40 -08:00
scsi_sysfs.c PM: Remove CONFIG_PM_OPS 2011-03-15 00:43:15 +01:00
scsi_tgt_if.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
scsi_tgt_lib.c [SCSI] esp, scsi_tgt_lib, fcoe: use list_move() instead of list_del()/list_add() combination 2011-05-01 10:20:10 -05:00
scsi_tgt_priv.h
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scsi_trace.c [SCSI] scsi_trace: Enhance SCSI command tracing 2010-04-30 12:52:08 -05:00
scsi_transport_api.h
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scsi_transport_fc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
scsi_transport_fc_internal.h
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scsi_transport_iscsi.c [SCSI] scsi_transport_iscsi: make priv_sess file writeable only by root 2011-03-23 11:35:58 -05:00
scsi_transport_sas.c block: remove per-queue plugging 2011-03-10 08:52:07 +01:00
scsi_transport_spi.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
scsi_transport_srp.c
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scsi_transport_srp_internal.h
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scsi_typedefs.h
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scsi_wait_scan.c
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scsicam.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sd.h [SCSI] sd: Logical Block Provisioning update 2011-03-14 18:37:34 -05:00
sd_dif.c block: Make the integrity mapped property a bio flag 2010-10-15 15:49:20 +02:00
ses.c [SCSI] ses: add subenclosure support 2011-03-23 11:37:09 -05:00
sg.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
sgiwd93.c platform-drivers: move probe to .devinit.text in drivers/scsi 2010-03-07 17:04:50 -08:00
sim710.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sni_53c710.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sr.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sr.h sr: implement sr_check_events() 2010-12-16 17:53:39 +01:00
sr_ioctl.c scsi: replace sr_test_unit_ready() with scsi_test_unit_ready() 2010-12-16 17:53:39 +01:00
sr_vendor.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
st.c [SCSI] st: Increase success probability in driver buffer allocation 2010-12-22 23:26:50 -06:00
st.h [SCSI] st: fix mdata->page_order handling 2009-12-10 08:54:13 -06:00
st_options.h
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stex.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
sun3_NCR5380.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sun3_scsi.c block: remove wrappers for request type/flags 2010-08-07 18:17:56 +02:00
sun3_scsi.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
sun3_scsi_vme.c block: remove wrappers for request type/flags 2010-08-07 18:17:56 +02:00
sun3x_esp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sun_esp.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
sym53c416.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sym53c416.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
t128.c
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t128.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
tmscsim.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
tmscsim.h
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u14-34f.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
ultrastor.c x86: Stop including <linux/delay.h> in two asm header files 2011-03-29 09:37:42 +02:00
ultrastor.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
vmw_pvscsi.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
vmw_pvscsi.h [SCSI] vmw_pvscsi: SCSI driver for VMware's virtual HBA. 2009-12-04 12:00:49 -06:00
wd33c93.c [SCSI] remove cmd->serial_number litter 2011-05-01 10:22:40 -05:00
wd33c93.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
wd7000.c Fix common misspellings 2011-03-31 11:26:23 -03:00
zalon.c [SCSI] zalon: fix oops on attach failure 2009-06-25 11:37:23 -05:00
zorro7xx.c m68k: amiga - Zorro bus modalias support 2010-05-17 21:37:41 +02:00