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Tejun Heo 8ea7645c5a libata: leave port thawed after reset failure 
libata EH intentionally left a port frozen if it failed
ata_eh_reset().  The intention was avoiding continuous loop of resets
when the controller or attached device is flaky and reporting spurious
hotplug events.  Once port enters this state, it can be recovered with
manual rescan, which seemed reasonable.

However, outside of my convoluted test setup, there have been very few
reports justifying this choice while there have been more cases where
the automatic freezing of the port after hotplug attempt of a faulty
device caused confusion and led to unnecessary resets.

This patch changes the behavior so that the port is thawed after reset
failure.  This change doesn't necessarily solve but makes it easier
and more intuitive to work around hotplug related problems
(ie. re-pluggin or power cycling the device) as reported in the
followings.

  https://bugzilla.kernel.org/show_bug.cgi?id=34712
  http://thread.gmane.org/gmane.linux.kernel/1123265/focus=49548

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Reartes Guillermo <rtguille@gmail.com>
Reported-by: Bruce Stenning <b.stenning@indigovision.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
 		2011-07-23 17:57:36 -04:00
..
Kconfig pata_arasan_cf: Adding support for arasan compact flash host controller 2011-03-14 02:52:46 -04:00
Makefile pata_arasan_cf: Adding support for arasan compact flash host controller 2011-03-14 02:52:46 -04:00
acard-ahci.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
ahci.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
ahci.h ahci: EM supported message type sysfs attribute 2011-04-24 11:31:31 -04:00
ahci_platform.c libata: reimplement link power management 2010-10-21 20:21:04 -04:00
ata_generic.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
ata_piix.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
libahci.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
libata-acpi.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
libata-core.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
libata-eh.c libata: leave port thawed after reset failure 2011-07-23 17:57:36 -04:00
libata-pmp.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
libata-scsi.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
libata-sff.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
libata-transport.c drivers/ata/libata-transport.c: include linux/slab.h 2010-10-21 20:21:04 -04:00
libata-transport.h [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
libata.h libata: plumb sas port scan into standard libata paths 2011-03-02 02:36:45 -05:00
pata_acpi.c libata: remove ATA_FLAG_{SRST|SATA_RESET} 2011-03-02 02:36:46 -05:00
pata_ali.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_amd.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_arasan_cf.c Fix common misspellings 2011-03-31 11:26:23 -03:00
pata_artop.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_at32.c libata: remove ATA_FLAG_MMIO 2011-03-02 02:36:46 -05:00
pata_at91.c pata_at91: SMC settings calculation bugfixes, support for t6z and IORDY 2011-05-14 15:00:13 -04:00
pata_atiixp.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_atp867x.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_bf54x.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_cmd64x.c pata_cm64x: fix boot crash on parisc 2011-05-14 14:59:15 -04:00
pata_cmd640.c pata_cmd640: implement sff_irq_check() method 2010-10-21 20:21:05 -04:00
pata_cs5520.c ata: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2011-07-23 17:57:36 -04:00
pata_cs5530.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_cs5535.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_cs5536.c pata_cs5536: avoid implicit MSR API inclusion on x86-64 2010-12-26 19:42:15 -05:00
pata_cypress.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_efar.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_hpt3x2n.c ata: pata: Convert pr_*(DRV_NAME ...) to pr_fmt/pr_<level> 2011-03-14 02:56:31 -04:00
pata_hpt3x3.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_hpt37x.c ata: pata: Convert pr_*(DRV_NAME ...) to pr_fmt/pr_<level> 2011-03-14 02:56:31 -04:00
pata_hpt366.c ata: pata: Convert pr_*(DRV_NAME ...) to pr_fmt/pr_<level> 2011-03-14 02:56:31 -04:00
pata_icside.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_isapnp.c [libata] Improve timeout handling 2009-03-24 22:52:39 -04:00
pata_it821x.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_it8213.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_ixp4xx_cf.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_jmicron.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_legacy.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_macio.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_marvell.c pata_marvell: Add support for 88SE91A0, 88SE91A4 2011-06-24 02:07:35 -04:00
pata_mpc52xx.c dt: Eliminate of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
pata_mpiix.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_netcell.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_ninja32.c [libata] trivial: trim trailing whitespace for drivers/ata/*.[ch] 2011-03-02 02:36:45 -05:00
pata_ns87410.c ata: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2011-07-23 17:57:36 -04:00
pata_ns87415.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_octeon_cf.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_of_platform.c dt: Eliminate of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
pata_oldpiix.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_opti.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_optidma.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_palmld.c Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel-stable 2011-03-26 10:03:03 +00:00
pata_pcmcia.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_pdc202xx_old.c pata_pdc202xx_old: implement sff_irq_check() method 2010-10-21 20:21:06 -04:00
pata_pdc2027x.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_piccolo.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_platform.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_pxa.c libata: remove ATA_FLAG_MMIO 2011-03-02 02:36:46 -05:00
pata_qdi.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_radisys.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_rb532_cf.c drivers: Final irq namespace conversion 2011-03-29 14:48:19 +02:00
pata_rdc.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_rz1000.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_samsung_cf.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
pata_sc1200.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_scc.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_sch.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_serverworks.c libata-sff: separate out BMDMA init 2010-05-25 19:40:30 -04:00
pata_sil680.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_sis.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_sl82c105.c ata: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2011-07-23 17:57:36 -04:00
pata_triflex.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pata_via.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
pdc_adma.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_dwc_460ex.c drivers/ata/sata_dwc_460ex: Fix typo 'corrresponding' 2011-06-23 16:40:28 -04:00
sata_fsl.c ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level> 2011-07-23 17:57:36 -04:00
sata_inic162x.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_mv.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_nv.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_promise.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_promise.h libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_qstor.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_sil.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_sil24.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_sis.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_svw.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_sx4.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_uli.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sata_via.c ata: sata_via: Use dev_dbg 2011-07-23 17:57:36 -04:00
sata_vsc.c ata: Add and use ata_print_version_once 2011-07-23 17:57:36 -04:00
sis.h libata: PATA-mode fixes for sis_sata 2007-07-02 10:17:42 -04:00