Niklas Cassel 759e8756da ata: libata-scsi: do not needlessly defer commands when using PMP with FBS ... The ACS specification does not allow a non-NCQ command to be issued while an NCQ command is outstanding. Commit 0ea84089db ("ata: libata-scsi: avoid Non-NCQ command starvation") introduced a feature where a deferred non-NCQ command gets issued from a workqueue. The design stores a single non-NCQ command per port. However, when using Port Multipliers (PMPs), specifically PMPs that support FIS-Based Switching (FBS), non-NCQ and NCQ commands can be mixed on the same port, just not for the same link, see e.g. ata_std_qc_defer() which is, and always has operated on a per-link basis. Therefore, move the deferred_qc from struct ata_port to struct ata_link. This way, when using a PMP with FBS, we will not needlessly defer commands to all other links, just because one link issued a non-NCQ command while having an NCQ command outstanding. Only commands for that specific link will be deferred. This is in line with how PMPs with FBS worked before commit 0ea84089db ("ata: libata-scsi: avoid Non-NCQ command starvation"). Fixes: 0ea84089db ("ata: libata-scsi: avoid Non-NCQ command starvation") Tested-by: Tommy Kelly <linux@tkel.ly> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Niklas Cassel <cassel@kernel.org>		2026-05-18 12:26:51 +02:00
..
pata_parport	ata: pata_parport: switch to dynamic root device	2026-04-27 11:38:16 +02:00
Kconfig	ata: ahci-dwc: Remove not-going-to-be-supported code for Baikal SoC	2026-02-24 15:29:57 +01:00
Makefile	ATA changes for 6.3-rc1	2023-02-22 13:35:51 -08:00
acard-ahci.c	ata: ahci: Replace deprecated PCI functions	2024-10-30 16:07:36 -05:00
ahci.c	ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585	2026-04-07 09:36:46 +02:00
ahci.h	ata: libahci_platform: use flex array for platform PHYs	2026-03-31 10:29:35 +02:00
ahci_brcm.c	ahci: Introduce ahci_ignore_port() helper	2025-01-09 17:52:17 +09:00
ahci_ceva.c	ahci: Introduce ahci_ignore_port() helper	2025-01-09 17:52:17 +09:00
ahci_da850.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
ahci_dm816.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
ahci_dwc.c	ata: ahci-dwc: Remove not-going-to-be-supported code for Baikal SoC	2026-02-24 15:29:57 +01:00
ahci_imx.c	ata: ahci-imx: Fix Wvoid-pointer-to-enum-cast warning	2026-01-08 17:43:00 +09:00
ahci_mtk.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_mvebu.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_octeon.c	ata: ahci_octeon: Convert to devm_platform_ioremap_resource()	2023-08-02 17:37:06 +09:00
ahci_platform.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_qoriq.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
ahci_seattle.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_st.c	ahci: st: Switch from CONFIG_PM_SLEEP guards to pm_sleep_ptr()	2025-01-15 15:21:27 +01:00
ahci_sunxi.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_tegra.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
ahci_xgene.c	ata: ahci-xgene: Fix Wvoid-pointer-to-enum-cast warning	2026-01-08 17:43:04 +09:00
ata_generic.c	ata: Constify struct pci_device_id	2024-12-03 05:10:20 +01:00
ata_piix.c	ata: libata-sata: Add link_power_management_supported sysfs attribute	2025-07-31 12:56:21 +09:00
libahci.c	ata: libata-sata: Add link_power_management_supported sysfs attribute	2025-07-31 12:56:21 +09:00
libahci_platform.c	ata: libahci_platform: use flex array for platform PHYs	2026-03-31 10:29:35 +02:00
libata-acpi.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
libata-core.c	ata: libata-scsi: do not needlessly defer commands when using PMP with FBS	2026-05-18 12:26:51 +02:00
libata-eh.c	ata: libata-scsi: do not needlessly defer commands when using PMP with FBS	2026-05-18 12:26:51 +02:00
libata-pata-timings.c	…
libata-pmp.c	ata: libata-scsi: do not needlessly defer commands when using PMP with FBS	2026-05-18 12:26:51 +02:00
libata-sata.c	ata: libata-sata: simplify ata_sas_queuecmd()	2026-02-24 09:40:58 +09:00
libata-scsi.c	ata: libata-scsi: do not needlessly defer commands when using PMP with FBS	2026-05-18 12:26:51 +02:00
libata-sff.c	ata: libata-sff: add WQ_PERCPU to alloc_workqueue users	2025-11-07 09:42:36 +01:00
libata-trace.c	ata: scsi: rename flag ATA_QCFLAG_FAILED to ATA_QCFLAG_EH	2023-01-04 13:36:26 +09:00
libata-transport.c	ata: libata-transport: remove static variable ata_scsi_transport_template	2026-04-02 21:01:10 +02:00
libata-transport.h	ata: libata-transport: remove static variable ata_scsi_transport_template	2026-04-02 21:01:10 +02:00
libata-zpodd.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
libata.h	ATA changes for 6.20	2026-02-12 17:12:43 -08:00
pata_acpi.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_ali.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_amd.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_arasan_cf.c	ata: pata_arasan_cf: fix missing newline in dev_err() messages	2026-04-03 09:16:00 +02:00
pata_artop.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_atiixp.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_atp867x.c	ata: Constify struct pci_device_id	2024-12-03 05:10:20 +01:00
pata_buddha.c	ata: pata_buddha: Remove #include <asm/ide.h>	2023-08-24 08:09:59 +09:00
pata_cmd64x.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_cmd640.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_cs5520.c	ata: pata_cs5520: Rephrase file header comment	2024-07-30 07:10:30 +09:00
pata_cs5530.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_cs5535.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_cs5536.c	ata: pata_cs5536: fix build on 32-bit UML	2025-06-10 14:26:27 +02:00
pata_cypress.c	ata: pata_cypress: fix typo in error message	2026-02-02 13:47:40 +09:00
pata_efar.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_ep93xx.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_falcon.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_ftide010.c	ata: pata_ftide010: Fix some DMA timings	2026-02-04 12:23:23 +01:00
pata_gayle.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_hpt3x2n.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_hpt3x3.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_hpt37x.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_hpt366.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_icside.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_imx.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_isapnp.c	ata: pata_isapnp: Add missing error check for devm_ioport_map()	2023-11-20 09:22:26 +09:00
pata_it821x.c	ata: pata_it821x: Replace deprecated strcpy with strscpy in it821x_display_disk	2025-10-23 14:23:40 +02:00
pata_it8213.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_ixp4xx_cf.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_jmicron.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_legacy.c	ata: pata_legacy: remove VLB support	2026-02-02 13:47:37 +09:00
pata_macio.c	ata: pata_macio: Remove space before newline	2025-08-01 08:43:08 +09:00
pata_marvell.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_mpc52xx.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_mpiix.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_netcell.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_ninja32.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_ns87410.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_ns87415.c	ata: pata_ns87415: mark ns87560_tf_read static	2023-07-28 08:52:42 +09:00
pata_octeon_cf.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_of_platform.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_oldpiix.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_opti.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_optidma.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_pcmcia.c	ata: pata_pcmcia: Add Iomega Clik! PCMCIA ATA/ATAPI Adapter	2025-11-18 21:58:41 +01:00
pata_pdc202xx_old.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_pdc2027x.c	ata: pata_pdc2027x: Remove space before newline and abbreviations	2025-08-01 08:43:11 +09:00
pata_piccolo.c	ata: Constify struct pci_device_id	2024-12-03 05:10:20 +01:00
pata_platform.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_pxa.c	ata: pata_pxa: Fix potential NULL pointer dereference in pxa_ata_probe()	2025-04-08 12:36:03 +09:00
pata_radisys.c	ata: Fix typos in the comment	2024-10-01 09:22:02 +02:00
pata_rb532_cf.c	ata: Switch back to struct platform_driver::remove()	2024-10-17 09:55:08 +02:00
pata_rdc.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_rz1000.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_sc1200.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_sch.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_serverworks.c	ata: pata_serverworks: Do not use the term blacklist	2024-07-30 07:10:08 +09:00
pata_sil680.c	scsi: ata: Declare SCSI host templates const	2023-03-24 19:19:19 -04:00
pata_sis.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_sl82c105.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_triflex.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pata_via.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
pdc_adma.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_dwc_460ex.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
sata_fsl.c	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	2026-02-21 17:09:51 -08:00
sata_gemini.c	ata: sata_gemini: Remove remaining reset glue	2024-12-16 22:36:27 +09:00
sata_gemini.h	ata: sata_gemini: Remove unused gemini_sata_reset_bridge()	2024-12-11 13:18:25 +09:00
sata_highbank.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_inic162x.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_mv.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_nv.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_promise.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_promise.h	…
sata_qstor.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_rcar.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_sil.c	ata: libata-core: Rename ata_do_set_mode()	2025-07-04 10:36:00 +02:00
sata_sil24.c	ata: libata-scsi: do not use the deferred QC feature on PMPs with CBS	2026-05-18 12:25:28 +02:00
sata_sis.c	ata: Use always-managed version of pci_intx()	2025-01-18 14:38:49 -06:00
sata_svw.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_sx4.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_uli.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_via.c	ata: libata-eh: Simplify reset operation management	2025-07-16 09:31:43 +02:00
sata_vsc.c	ata: Use always-managed version of pci_intx()	2025-01-18 14:38:49 -06:00
sis.h	…