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d66af4df08
linux/drivers/ata
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Aaron Lu d66af4df08 [libata] acpi: make ata_ap_acpi_handle not block 
Since commit 30dcf76acc, ata_ap_acpi_handle will always do a namespace
walk, which requires acquiring an acpi namespace mutex. This made it
impossible to be used when calling path has held a spinlock.

For example, it can occur in the following code path for pata_acpi:
ata_scsi_queuecmd (ap->lock is acquired)
  __ata_scsi_queuecmd
    ata_scsi_translate
      ata_qc_issue
        pacpi_qc_issue
          ata_acpi_stm
            ata_ap_acpi_handle
              acpi_get_child
                acpi_walk_namespace
                  acpi_ut_acquire_mutex (acquire mutex while holding lock)
This caused scheduling while atomic bug, as reported in bug #56781.

Actually, ata_ap_acpi_handle doesn't have to walk the namespace every
time it is called, it can simply return the bound acpi handle on the
corresponding SCSI host. The reason previously it is not done this way
is, ata_ap_acpi_handle is used in the binding function
ata_acpi_bind_host by ata_acpi_gtm when the handle is not bound to the
SCSI host yet. Since we already have the ATA port's handle in its
binding function, we can simply use it instead of calling
ata_ap_acpi_handle there. So introduce a new function __ata_acpi_gtm,
where it will receive an acpi handle param in addition to the ATA port
which is solely used for debug statement. With this change, we can make
ata_ap_acpi_handle simply return the bound handle for SCSI host instead
of walking the acpi namespace now.

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=56781
Reported-and-tested-by: <kenzopl@o2.pl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2013-04-30 18:02:45 -04:00
..
acard-ahci.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
ahci_platform.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
ahci.c ahci: Add Device IDs for Intel Wellsburg PCH 2013-03-04 17:11:50 -05:00
ahci.h AHCI: Support multiple MSIs 2013-01-24 17:25:13 +01:00
ata_generic.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
ata_piix.c ata_piix: Fix DVD not dectected at some Haswell platforms 2013-04-03 19:43:36 -04:00
Kconfig [libata] Avoid specialized TLA's in ZPODD's Kconfig 2013-03-04 17:12:46 -05:00
libahci.c AHCI: Support multiple MSIs 2013-01-24 17:25:13 +01:00
libata-acpi.c [libata] acpi: make ata_ap_acpi_handle not block 2013-04-30 18:02:45 -04:00
libata-core.c libata: fix DMA to stack in reading devslp_timing parameters 2013-04-03 19:45:57 -04:00
libata-eh.c [libata] pm: differentiate system and runtime pm for ata port 2013-01-25 15:33:33 -05:00
libata-pmp.c libata: migrate ACPI code over to new bindings 2012-06-29 11:38:11 -04:00
libata-scsi.c [libata] SCSI: really use SATL version in VPD 2013-04-11 19:39:44 -04:00
libata-sff.c ata: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:16 +08:00
libata-transport.c Revert "libata: export host controller number thru /sys" 2013-01-25 15:30:23 -05:00
libata-transport.h [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
libata-zpodd.c [libata] fix smatch warning for zpodd_wake_dev 2013-02-20 17:14:03 -05:00
libata.h libata: handle power transition of ODD 2013-01-21 15:41:56 -05:00
Makefile libata: add R-Car SATA driver 2013-02-20 17:10:53 -05:00
pata_acpi.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ali.c pata_ali: fix "Satelite" typo 2011-10-14 13:10:42 -04:00
pata_amd.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_arasan_cf.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_artop.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_at32.c pata_at32: use module_platform_driver_probe() 2013-04-03 19:52:10 -04:00
pata_at91.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_atiixp.c pata_atiixp: override cable detection on MSI E350DM-E33 2012-08-17 13:26:51 -04:00
pata_atp867x.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_bf54x.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_cmd64x.c ata: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-28 12:40:15 -05:00
pata_cmd640.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_cs5520.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_cs5530.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_cs5535.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_cs5536.c pata_cs5536: add quirk for broken udma 2012-11-28 12:38:41 -05:00
pata_cypress.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_efar.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ep93xx.c [libata] Convert to devm_ioremap_resource() 2013-02-20 17:13:10 -05:00
pata_hpt3x2n.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_hpt3x3.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_hpt37x.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_hpt366.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_icside.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_imx.c pata_imx: add devicetree support 2013-04-11 19:38:00 -04:00
pata_isapnp.c [libata] Improve timeout handling 2009-03-24 22:52:39 -04:00
pata_it821x.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_it8213.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ixp4xx_cf.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_jmicron.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_legacy.c pata_legacy: bogus clock in opti82c46x_set_piomode() 2013-04-03 19:53:10 -04:00
pata_macio.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_marvell.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_mpc52xx.c Merge remote-tracking branch 'agust/next' into next 2013-02-20 11:39:05 +11:00
pata_mpiix.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_netcell.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ninja32.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ns87410.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_ns87415.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_octeon_cf.c pata_octeon_cf: Use resource_size function 2013-04-03 19:53:30 -04:00
pata_of_platform.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_oldpiix.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_opti.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_optidma.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_palmld.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_pcmcia.c drivers/ata/pata_pcmcia.c: adjust suspicious bit operation 2012-07-25 15:06:20 -04:00
pata_pdc202xx_old.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_pdc2027x.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_piccolo.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_platform.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_pxa.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_radisys.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_rb532_cf.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_rdc.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_rz1000.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_samsung_cf.c pata_samsung_cf: use module_platform_driver_probe() 2013-03-04 17:12:52 -05:00
pata_sc1200.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_scc.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_sch.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_serverworks.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_sil680.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_sis.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_sl82c105.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_triflex.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pata_via.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
pdc_adma.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_dwc_460ex.c sata_dwc_460ex: remove file exec bit (chmod 0755 -> 0644) 2012-12-14 09:43:39 -05:00
sata_fsl.c fsl/sata: create a sysfs entry for rx water mark 2013-04-03 19:55:36 -04:00
sata_highbank.c sata_highbank: make ahci_highbank_pm_ops static 2013-04-03 19:53:45 -04:00
sata_inic162x.c sata_inic162x: remove unused variable in inic_scr_read() 2012-11-28 12:39:09 -05:00
sata_mv.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
sata_nv.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_promise.c sata_promise: fix hardreset lockdep error 2012-11-28 12:37:56 -05:00
sata_promise.h libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_qstor.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_rcar.c sata_rcar: Convert to devm_ioremap_resource() 2013-04-11 19:34:48 -04:00
sata_sil24.c sata_sil24: remove unused variable from sata_sil24.c 2012-11-28 12:39:20 -05:00
sata_sil.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_sis.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_svw.c sata_svw: check DMA start bit before reset 2012-11-15 23:54:41 -05:00
sata_sx4.c sata_sx4: pdc20621_{ata|host}_sg() do not need 'tf' parameter 2012-11-28 12:39:44 -05:00
sata_uli.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_via.c ata: use module_pci_driver 2012-07-25 15:12:11 -04:00
sata_vsc.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
sis.h