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7f4774b38e
linux/drivers/ata
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Tejun Heo 7f4774b38e sata_nv: use hardreset only for post-boot probing 
When I thought it was finally defeated, it came back with vengeance.
The failure cases are ever more convoluted.  Now there is a single
combination which fails boot probing - MCP5x + Intel SSD and there are
two hotplug failure reports on different flavors where softreset fails
to bring up the device.

Through the many bug reports after the switch to hardreset, the
following patterns emerged.

- Softreset during boot always works.

- Hardreset during boot sometimes fails to bring up the link on
  certain comibnations and device signature acquisition is unreliable.

- Hardreset is often necessary after hotplug.

It looks like the old behavior of preferring softreset was somehow
pretty close to the working reset protocol although it could have lost
a device during phy error handling by issuing hardreset.

This patch implements nv_hardreset() which kicks in only for post-boot
(!LOADING) device probing resets.  This should be able to work around
all known problem cases.  This isn't perfect but given the various
hardreset quirks on these controllers, I think this is as good as it
can get.

Tested on mcp5x (swncq), nf3 and ck804 for all both boot, warm and
hot probing cases.

Kudos to all the bug reporters and their painful hours with these damn
controllers.  ;-)

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Robert Hancock <hancockr@shaw.ca>
Reported-by: David Lang <david@lang.hm>
Reported-by: Samo Vodopivec <lament.email.si@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-06-10 11:05:26 -04:00
..
ahci.c [libata] ahci: Restore SB600 SATA controller 64 bit DMA 2009-06-10 11:05:00 -04:00
ata_generic.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
ata_piix.c ata_piix: Remove stale comment 2009-06-10 07:50:18 -04:00
Kconfig trivial: fix typos/grammar errors in Kconfig texts 2009-03-30 15:22:01 +02:00
libata-acpi.c
libata-core.c [libata] get rid of ATA_MAX_QUEUE loop in ata_qc_complete_multiple() v2 2009-06-10 07:50:17 -04:00
libata-eh.c libata: clear ering on resume 2009-05-11 14:30:59 -04:00
libata-pmp.c
libata-scsi.c libata: Media rotation rate and form factor heuristics 2009-05-15 14:14:56 -04:00
libata-sff.c libata-sff: avoid byte swapping in ata_sff_data_xfer() 2009-06-10 07:50:16 -04:00
libata.h [libata] Export ata_pio_queue_task() so that it can be used from sata_mv. 2009-03-24 22:02:41 -04:00
Makefile
pata_acpi.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_ali.c [libata] pata_ali: Use IGN_SIMPLEX 2009-06-05 17:10:54 -04:00
pata_amd.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_artop.c pata_artop: Serializing support 2009-03-24 22:45:05 -04:00
pata_at32.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_atiixp.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_bf54x.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cmd64x.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cmd640.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cs5520.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
pata_cs5530.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cs5535.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cs5536.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_cypress.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_efar.c pata_efar: fix PIO2 underclocking 2009-06-05 14:40:52 -04:00
pata_hpt3x2n.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_hpt3x3.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_hpt37x.c pata_hpt37x: fix HPT370 DMA timeouts 2009-04-16 15:21:15 -04:00
pata_hpt366.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_icside.c Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
pata_isapnp.c [libata] Improve timeout handling 2009-03-24 22:52:39 -04:00
pata_it821x.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_it8213.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_ixp4xx_cf.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
pata_jmicron.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_legacy.c pata_legacy: wait for async probing 2009-06-05 14:40:46 -04:00
pata_marvell.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_mpc52xx.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_mpiix.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_netcell.c pata_netcell: Fix typo 2009-06-08 09:12:28 -07:00
pata_ninja32.c ata: Report 16/32bit PIO as best we can 2009-04-16 15:28:23 -04:00
pata_ns87410.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_ns87415.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_octeon_cf.c libata: Remove some redundant casts from pata_octeon_cf.c 2009-04-06 20:00:35 -04:00
pata_of_platform.c
pata_oldpiix.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_opti.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_optidma.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_pcmcia.c [libata] Drain data on errors 2009-03-24 22:48:26 -04:00
pata_pdc202xx_old.c pata_pdc202xx_old: fix UDMA33 handling 2009-05-11 14:30:07 -04:00
pata_pdc2027x.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_platform.c
pata_qdi.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_radisys.c pata_radisys: fix mwdma_mask to exclude mwdma0 2009-03-24 22:13:32 -04:00
pata_rb532_cf.c pata-rb532-cf: platform_get_irq() fix ignored failure 2009-03-24 22:16:34 -04:00
pata_rz1000.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_sc1200.c pata_sc1200: Activate secondary channel 2009-03-24 22:45:37 -04:00
pata_scc.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_sch.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_serverworks.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_sil680.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_sis.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_sl82c105.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_triflex.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pata_via.c pata_via: Cache and rewrite the device bit 2009-04-17 19:04:30 -04:00
pata_winbond.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
pdc_adma.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
sata_fsl.c sata_fsl: Fix the command description of FSL SATA controller 2009-05-15 14:14:08 -04:00
sata_inic162x.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
sata_mv.c sata_mv: use new sata phy register settings for new devices 2009-05-11 14:29:41 -04:00
sata_nv.c sata_nv: use hardreset only for post-boot probing 2009-06-10 11:05:26 -04:00
sata_promise.c [libata] Improve timeout handling 2009-03-24 22:52:39 -04:00
sata_promise.h
sata_qstor.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
sata_sil24.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
sata_sil.c sata_sil: enable 32-bit PIO 2009-06-10 07:50:17 -04:00
sata_sis.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
sata_svw.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
sata_sx4.c sata_sx4: speed up ECC initialization 2009-06-10 07:50:17 -04:00
sata_uli.c [libata] convert drivers to use ata.h mode mask defines 2009-03-24 22:13:27 -04:00
sata_via.c [libata] sata_via: kill uninit'd var warning 2009-04-13 04:09:34 -04:00
sata_vsc.c dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
sis.h