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2cf532f5e6
linux/drivers/ata
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Alexander Gordeev 2cf532f5e6 ahci: Do not receive interrupts sent by dummy ports 
In multiple MSI mode all AHCI ports (including dummy) get assigned
separate MSI vectors and (as result of execution
pci_enable_msi_exact() function) separate IRQ numbers, (mapped to the
MSI vectors).

Therefore, although interrupts from dummy ports are not desired they
are still enabled. We do not request IRQs for dummy ports, but that
only means we do not assign AHCI-specific ISRs to corresponding IRQ
numbers.

As result, dummy port interrupts still could come and traverse all the
way from the PCI device to the kernel, causing unnecessary overhead.

This update disables IRQs for dummy ports and prevents the described
issue.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Tested-by: David Milburn <dmilburn@redhat.com>
Cc: linux-ide@vger.kernel.org
Cc: stable@vger.kernel.org
Fixes: 5ca72c4f7c ("AHCI: Support multiple MSIs")
2014-04-18 15:55:57 -04:00
..
acard-ahci.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
ahci_da850.c ata: add new-style AHCI platform driver for DaVinci DA850 AHCI controller 2014-03-25 15:17:13 -04:00
ahci_imx.c ahci_imx: Put #ifdef CONFIG_PM_SLEEP around suspend / resume functions 2014-03-06 14:31:13 -05:00
ahci_platform.c ata: move library code from ahci_platform.c to libahci_platform.c 2014-03-25 15:17:13 -04:00
ahci_st.c ata: ahci_st: remove deprecated struct ahci_platform_data usage 2014-03-14 14:26:29 -04:00
ahci_sunxi.c ata: ahci_sunxi: fix code formatting 2014-03-17 10:46:54 -04:00
ahci_xgene.c ata: Fix compiler warning with APM X-Gene host controller driver 2014-03-18 16:01:04 -04:00
ahci.c ahci: Do not receive interrupts sent by dummy ports 2014-04-18 15:55:57 -04:00
ahci.h ahci: Ensure "MSI Revert to Single Message" mode is not enforced 2014-04-17 09:58:48 -04:00
ata_generic.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
ata_piix.c ata_piix: minor typo and a printk fix 2013-10-13 16:17:48 -04:00
Kconfig ata: fix i.MX AHCI driver dependencies 2014-04-08 08:31:48 -04:00
libahci_platform.c ata: move library code from ahci_platform.c to libahci_platform.c 2014-03-25 15:17:13 -04:00
libahci.c ata: remove superfluous casts 2014-03-26 12:36:53 -04:00
libata-acpi.c ACPI and power management updates for 3.15-rc1 2014-04-01 12:48:54 -07:00
libata-core.c libata: Update queued trim blacklist for M5x0 drives 2014-04-02 13:10:21 -04:00
libata-eh.c libata, libsas: kill pm_result and related cleanup 2014-03-18 16:08:38 -04:00
libata-pmp.c ata: enable quirk from jmicron JMB350 for JMB394 2014-01-31 07:05:44 -05:00
libata-scsi.c Merge branch 'for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-01-21 18:16:08 -08:00
libata-sff.c libata: update "Maintained by:" tags 2013-05-14 11:13:04 -07:00
libata-transport.c libata: Fix display of sata speed 2013-10-27 07:43:25 -04:00
libata-transport.h [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
libata-zpodd.c libata: zpodd: eliminate odd_can_poweroff 2014-03-14 11:23:47 -04:00
libata.h ATA / ACPI: remove power dependent device handling 2013-10-17 15:38:53 +02:00
Makefile ata: add new-style AHCI platform driver for DaVinci DA850 AHCI controller 2014-03-25 15:17:13 -04:00
pata_acpi.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ali.c ata: use pci_get_drvdata() 2013-06-02 22:22:03 -07:00
pata_amd.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_arasan_cf.c pata_arasan_cf: fix ata_host_activate() failure handling 2014-04-14 13:50:03 -04:00
pata_artop.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_at32.c ata: use dev_get_platdata() 2013-07-30 08:59:24 -04:00
pata_at91.c pata_at91: fix ata_host_activate() failure handling 2014-04-02 13:17:31 -04:00
pata_atiixp.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_atp867x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_bf54x.c ata: use platform_{get,set}_drvdata() 2013-05-24 10:26:13 +09:00
pata_cmd64x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cmd640.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cs5520.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cs5530.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cs5535.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cs5536.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_cypress.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_efar.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ep93xx.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt3x2n.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt3x3.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt37x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_hpt366.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_icside.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_imx.c Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-03-31 15:27:37 -07:00
pata_isapnp.c pata_isapnp: Don't use invalid I/O ports 2013-10-07 15:17:32 -04:00
pata_it821x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_it8213.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ixp4xx_cf.c DMA-API: others: use dma_set_coherent_mask() 2013-10-31 14:49:07 +00:00
pata_jmicron.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_legacy.c pata_legacy: Remove dead code 2014-03-11 08:30:53 -04:00
pata_macio.c ata: use pci_get_drvdata() 2013-06-02 22:22:03 -07:00
pata_marvell.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_mpc52xx.c ata: use platform_{get,set}_drvdata() 2013-05-24 10:26:13 +09:00
pata_mpiix.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_netcell.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ninja32.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ns87410.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_ns87415.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_octeon_cf.c DMA-API: ata: pata_octeon_cf: convert to use dma_coerce_mask_and_coherent() 2013-10-31 14:48:49 +00:00
pata_of_platform.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_oldpiix.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_opti.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_optidma.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_palmld.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_pcmcia.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_pdc202xx_old.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_pdc2027x.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_piccolo.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_platform.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_pxa.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_radisys.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_rb532_cf.c Drivers: ata: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pata_rdc.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_rz1000.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_samsung_cf.c pata_samsung_cf: fix ata_host_activate() failure handling 2014-04-15 08:48:56 -04:00
pata_sc1200.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_scc.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_sch.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_serverworks.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_sil680.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_sis.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_sl82c105.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_triflex.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pata_via.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
pdc_adma.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_dwc_460ex.c ata: remove superfluous casts 2014-03-26 12:36:53 -04:00
sata_fsl.c drivers: clean-up prom.h implicit includes 2013-10-09 20:04:04 -05:00
sata_highbank.c ata: sata_highbank: remove superfluous cast 2014-03-26 11:42:01 -04:00
sata_inic162x.c libata: make it clear that sata_inic162x is experimental 2013-07-22 17:11:14 -04:00
sata_mv.c Merge branch 'for-3.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-02-20 12:04:15 -08:00
sata_nv.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_promise.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_promise.h
sata_qstor.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_rcar.c sata_rcar: Add R-Car Gen2 SATA PHY support 2013-11-29 15:41:17 -05:00
sata_sil24.c ata: use pci_get_drvdata() 2013-06-02 22:22:03 -07:00
sata_sil.c Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-03-31 15:27:37 -07:00
sata_sis.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_svw.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_sx4.c ata: remove superfluous casts 2014-03-26 12:36:53 -04:00
sata_uli.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_via.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sata_vsc.c ata: delete non-required instances of include <linux/init.h> 2014-02-13 16:40:56 -05:00
sis.h