redonkable/remarkable-linux
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Stefan Richter 105e53f863 firewire: sbp2: parallelize login, reconnect, logout 
The struct sbp2_logical_unit.work items can all be executed in parallel
but are not reentrant.  Furthermore, reconnect or re-login work must be
executed in a WQ_MEM_RECLAIM workqueue.

Hence replace the old single-threaded firewire-sbp2 workqueue by a
concurrency-managed but non-reentrant workqueue with rescuer.
firewire-core already maintains one, hence use this one.

In earlier versions of this change, I observed occasional failures of
parallel INQUIRY to an Initio INIC-2430 FireWire 800 to dual IDE bridge.
More testing indicates that parallel INQUIRY is not actually a problem,
but too quick successions of logout and login + INQUIRY, e.g. a quick
sequence of cable plugout and plugin, can result in failed INQUIRY.
This does not seem to be something that should or could be addressed by
serialization.

Another dual-LU device to which I currently have access to, an
OXUF924DSB FireWire 800 to dual SATA bridge with firmware from MacPower,
has been successfully tested with this too.

This change is beneficial to environments with two or more FireWire
storage devices, especially if they are located on the same bus.
Management tasks that should be performed as soon and as quickly as
possible, especially reconnect, are no longer held up by tasks on other
devices that may take a long time, especially login with INQUIRY and sd
or sr driver probe.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2011-05-10 22:53:46 +02:00
..
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acpi ACPI / PM: Avoid infinite recurrence while registering power resources 2011-04-26 11:33:18 +02:00
amba PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS 2011-04-11 22:54:42 +02:00
ata libata: ahci_start_engine compliant to AHCI spec 2011-04-24 11:35:40 -04:00
atm Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
auxdisplay Fix common misspellings 2011-03-31 11:26:23 -03:00
base PM / Wakeup: Fix initialization of wakeup-related device sysfs files 2011-04-26 11:33:09 +02:00
block libceph: fix ceph_osdc_alloc_request error checks 2011-05-03 09:28:13 -07:00
bluetooth Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
cdrom Fix common misspellings 2011-03-31 11:26:23 -03:00
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2011-04-21 09:58:42 -07:00
clk CLKDEV: Fix clkdev return value for NULL clk case 2011-04-30 10:14:08 +01:00
clocksource
connector connector: fix skb double free in cn_rx_skb() 2011-04-12 14:38:57 -07:00
cpufreq Fix common misspellings 2011-03-31 11:26:23 -03:00
cpuidle
crypto Fix common misspellings 2011-03-31 11:26:23 -03:00
dca drivers/dca/dca-core.c: use list_move() instead of list_del()/list_add() combination 2011-03-22 17:44:12 -07:00
dio
dma Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
edac amd64_edac: Erratum #637 workaround 2011-04-26 16:18:56 +02:00
eisa
firewire firewire: sbp2: parallelize login, reconnect, logout 2011-05-10 22:53:46 +02:00
firmware sigma-firmware: loader for Analog Devices' SigmaStudio 2011-03-22 17:44:15 -07:00
gpio Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-05-09 16:59:51 -07:00
hid Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
hwmon hwmon: (twl4030-madc-hwmon) Return proper error if hwmon_device_register fails 2011-05-01 09:06:35 -07:00
hwspinlock hwspinlock: depend on OMAP4 2011-03-18 17:15:11 -07:00
i2c i2c-parport: Fix adapter list handling 2011-05-01 18:18:49 +02:00
ide ide: unexport DISK_EVENT_MEDIA_CHANGE for ide-gd and ide-cd 2011-04-21 19:43:59 +02:00
idle
ieee802154 ieee802154: change to new flag variable 2011-03-17 14:05:34 +01:00
infiniband Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-05-02 20:26:32 -07:00
isdn Fix common misspellings 2011-03-31 11:26:23 -03:00
leds leds/leds-regulator.c: fix handling of already enabled regulators 2011-04-14 16:06:54 -07:00
lguest Fix common misspellings 2011-03-31 11:26:23 -03:00
macintosh Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
mca
md raid5: fix build error, sector_t usage 2011-04-21 10:00:00 -07:00
media firewire: optimize iso queueing by setting wake only after the last packet 2011-05-10 22:53:45 +02:00
memstick Fix common misspellings 2011-03-31 11:26:23 -03:00
message Fix common misspellings 2011-03-31 11:26:23 -03:00
mfd omap:usb: add regulator support for EHCI 2011-05-02 15:29:26 +03:00
misc drivers/misc/sgi-gru/grufile.c: fix the wrong members of gru_chip 2011-04-14 16:06:55 -07:00
mmc mmc: sdhci: Check mrq != NULL in sdhci_tasklet_finish 2011-04-27 19:16:50 -04:00
mtd Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
net Revert: veth: remove unneeded ifname code from veth_newlink() 2011-05-02 15:54:31 -07:00
nfc
nubus
of Fix common misspellings 2011-03-31 11:26:23 -03:00
oprofile
parisc Fix common misspellings 2011-03-31 11:26:23 -03:00
parport parport_pc.c: correctly release the requested region for the IT887x 2011-04-19 16:36:24 -07:00
pci Merge git://git.infradead.org/iommu-2.6 2011-04-21 09:56:35 -07:00
pcmcia Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
platform eeepc-laptop: Use ACPI handle to identify rfkill port 2011-05-09 10:48:47 -04:00
pnp Fix common misspellings 2011-03-31 11:26:23 -03:00
power drivers: Final irq namespace conversion 2011-03-29 14:48:19 +02:00
pps Fix common misspellings 2011-03-31 11:26:23 -03:00
ps3 Fix common misspellings 2011-03-31 11:26:23 -03:00
rapidio RapidIO/mpc85xx: fix possible mport registration problems 2011-04-14 16:06:56 -07:00
regulator Fix common misspellings 2011-03-31 11:26:23 -03:00
rtc rtc: max8925: Call dev_set_drvdata before rtc_device_register 2011-04-28 11:16:21 +02:00
s390 [S390] irqstats: fix counting of pfault, dasd diag and virtio irqs 2011-04-29 10:42:25 +02:00
sbus Fix common misspellings 2011-03-31 11:26:23 -03:00
scsi [SCSI] fix oops in scsi_run_queue() 2011-05-03 15:30:00 -05:00
sfi Fix common misspellings 2011-03-31 11:26:23 -03:00
sh sh: Fix irq cleanup fallout 2011-03-30 00:15:49 +02:00
sn
spi Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
ssb Fix common misspellings 2011-03-31 11:26:23 -03:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-05-04 14:23:41 -07:00
target Fix common misspellings 2011-03-31 11:26:23 -03:00
tc
telephony Fix common misspellings 2011-03-31 11:26:23 -03:00
thermal
tty tty/n_gsm: fix bug in CRC calculation for gsm1 mode 2011-04-19 16:38:50 -07:00
uio Fix common misspellings 2011-03-31 11:26:23 -03:00
usb xHCI: Clear PLC in xhci_bus_resume() 2011-05-03 11:14:32 -07:00
uwb Fix common misspellings 2011-03-31 11:26:23 -03:00
vhost
video ARM: pxafb: Fix access to nonexistent member of pxafb_info 2011-04-12 23:07:42 +08:00
virtio virtio_pci: Prevent double-free of pci regions after device hot-unplug 2011-04-21 22:57:00 +09:30
vlynq vlynq: Convert irq functions 2011-03-28 19:33:04 +02:00
w1 Fix common misspellings 2011-03-31 11:26:23 -03:00
watchdog watchdog: iTCO_wdt: TCO Watchdog patch for Intel Panther Point PCH 2011-04-26 12:50:44 +00:00
xen PM: Add missing syscore_suspend() and syscore_resume() calls 2011-04-20 00:36:11 +02:00
zorro
Kconfig
Makefile