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b30f7c8eb0
linux/drivers/spi
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Mark Brown b30f7c8eb0
spi: mux: Fix mux interaction with fast path optimisations 
The spi-mux driver is rather too clever and attempts to resubmit any
message that is submitted to it to the parent controller with some
adjusted callbacks.  This does not play at all nicely with the fast
path which now sets flags on the message indicating that it's being
handled through the fast path, we see async messages flagged as being on
the fast path.  Ideally the spi-mux code would duplicate the message but
that's rather invasive and a bit fragile in that it relies on the mux
knowing which fields in the message to copy.  Instead teach the core
that there are controllers which can't cope with the fast path and have
the mux flag itself as being such a controller, ensuring that messages
going via the mux don't get partially handled via the fast path.

This will reduce the performance of any spi-mux connected device since
we'll now always use the thread for both the actual controller and the
mux controller instead of just the actual controller but given that we
were always hitting the slow path anyway it's hopefully not too much of
an additional cost and it allows us to keep the fast path.

Fixes: ae7d2346dc ("spi: Don't use the message queue if possible in spi_sync")
Reported-by: Casper Andersson <casper.casan@gmail.com>
Tested-by: Casper Andersson <casper.casan@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220901120732.49245-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-09-02 13:27:13 +01:00
..
atmel-quadspi.c spi: atmel-quadspi: align condition to parenthesis 2022-06-09 12:20:05 +01:00
internals.h
Kconfig spi: Updates for v5.20 2022-08-02 10:55:04 -07:00
Makefile spi: spi-gxp: Add support for HPE GXP SoCs 2022-07-29 17:38:52 +01:00
spi-altera-core.c spi: altera: separate core code from platform code 2021-04-20 17:26:40 +01:00
spi-altera-dfl.c spi: spi-altera-dfl: Fix an error handling path 2022-06-06 12:39:16 +01:00
spi-altera-platform.c spi: altera: Change to dynamic allocation of spi id 2021-10-20 01:53:15 +01:00
spi-amd.c spi: amd: Add struct and enum kernel-doc comments 2022-07-06 15:20:50 +01:00
spi-ar934x.c spi: ar934x: fix transfer size 2022-01-04 14:59:40 +00:00
spi-armada-3700.c spi: a3700: support BE for AC5 SPI driver 2022-07-26 16:51:07 +01:00
spi-aspeed-smc.c spi: aspeed: Fix division by zero 2022-06-29 18:10:12 +01:00
spi-at91-usart.c spi: at91-usart: replacing legacy gpio interface for gpiod 2021-10-20 00:23:21 +01:00
spi-ath79.c spi: ath79: add mem_ops for fast-read 2022-02-08 13:40:18 +00:00
spi-atmel.c spi: atmel: remove #ifdef CONFIG_{PM, SLEEP} 2022-07-18 13:45:32 +01:00
spi-au1550.c spi: spi-au1550: replace ternary operator with min() 2022-05-16 17:57:01 +01:00
spi-axi-spi-engine.c spi: spi-axi-spi-engine: remove usage of delay_usecs 2021-03-12 14:30:42 +00:00
spi-bcm63xx-hsspi.c spi: bcm63xx-hsspi: fix pm_runtime 2021-03-10 12:25:12 +00:00
spi-bcm63xx.c spi: bcm63xx-spi: don't check 'delay_usecs' field 2021-03-12 14:30:43 +00:00
spi-bcm2835.c spi: Updates for v5.20 2022-08-02 10:55:04 -07:00
spi-bcm2835aux.c spi: bcm2835aux: Convert to use GPIO descriptors 2022-02-01 16:08:47 +00:00
spi-bcm-qspi.c spi: bcm-qspi: fix MSPI only access with bcm_qspi_exec_mem_op() 2022-04-06 15:50:11 +01:00
spi-bcm-qspi.h
spi-bitbang-txrx.h spi: bitbang: Fix lsb-first Rx 2022-08-15 01:26:20 +01:00
spi-bitbang.c spi: Cleanup on failure of initial setup 2021-06-01 14:03:12 +01:00
spi-brcmstb-qspi.c
spi-butterfly.c spi: butterfly: Switch to use module_parport_driver() 2021-03-10 12:46:05 +00:00
spi-cadence-quadspi.c spi: cadence-quadspi: Disable irqs during indirect reads 2022-08-22 14:05:21 +01:00
spi-cadence-xspi.c spi: cadence: fix platform_get_irq.cocci warning 2022-03-07 13:16:07 +00:00
spi-cadence.c spi: spi-cadence: Fix SPI NO Slave Select macro definition 2022-07-20 18:45:21 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
spi-cavium.h
spi-clps711x.c spi: clps711x: Use syscon_regmap_lookup_by_phandle 2022-04-25 14:01:09 +01:00
spi-coldfire-qspi.c spi: coldfire-qspi: Use clk_disable_unprepare in the remove function 2021-08-19 18:20:10 +01:00
spi-davinci.c spi: davinci: invoke chipselect callback 2021-08-24 20:53:24 +01:00
spi-dln2.c spi: dln2: Propagate firmware node 2021-12-23 13:38:38 +00:00
spi-dw-bt1.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw-core.c spi: dw: Add support for master mode selection for DWC SSI controller 2022-07-13 13:32:31 +01:00
spi-dw-dma.c spi: dw: Add deferred DMA-channels setup support 2022-06-27 13:24:33 +01:00
spi-dw-mmio.c spi: dw: Add support for Intel Thunder Bay SPI controller 2022-07-13 13:32:32 +01:00
spi-dw-pci.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw.h spi: dw: Add support for Intel Thunder Bay SPI controller 2022-07-13 13:32:32 +01:00
spi-ep93xx.c spi: spi-ep93xx: Prepare clock before using it 2021-08-03 18:27:24 +01:00
spi-falcon.c spi: spi-falcon: remove check for 'delay_usecs' 2021-03-12 14:30:48 +00:00
spi-fsi.c spi: fsi: Increase timeout and ensure status is checked 2022-06-23 15:48:21 +01:00
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c spi: spi-fsl-dspi: Fix issue with uninitialized dma_slave_config 2021-08-10 13:22:19 +01:00
spi-fsl-espi.c spi: fsl-espi: remove usage of 'delay_usecs' field 2021-03-12 14:30:49 +00:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c dmaengine: imx: Move header to include/dma/ 2022-04-19 12:06:18 +01:00
spi-fsl-qspi.c spi: spi-fsl-qspi: check return value after calling platform_get_resource_byname() 2022-05-09 12:48:47 +01:00
spi-fsl-spi.c spi: Cleanup on failure of initial setup 2021-06-01 14:03:12 +01:00
spi-fsl-spi.h
spi-geni-qcom.c spi: qcom: geni: Simplify DMA setting 2022-01-28 16:00:24 +00:00
spi-gpio.c spi: gpio: Implement LSB First bitbang support 2022-02-22 11:56:41 +00:00
spi-gxp.c spi: spi-gxp: Add support for HPE GXP SoCs 2022-07-29 17:38:52 +01:00
spi-hisi-kunpeng.c spi: hisi-kunpeng: Fix the debugfs directory name incorrect 2021-11-17 13:04:54 +00:00
spi-hisi-sfc-v3xx.c spi: hisi-sfc-v3xx: drop unnecessary ACPI_PTR and related ifendif protection 2021-04-12 17:07:38 +01:00
spi-img-spfi.c spi: img-spfi: Fix pm_runtime_get_sync() error checking 2022-04-22 12:37:36 +01:00
spi-imx.c sound updates for 5.19-rc1 2022-05-25 16:55:16 -07:00
spi-ingenic.c spi: ingenic: Add support for new Ingenic SoCs. 2022-04-25 14:00:51 +01:00
spi-intel-pci.c spi: intel: Add support for Intel Meteor Lake-P SPI serial flash 2022-06-29 12:38:20 +01:00
spi-intel-platform.c mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-intel.c spi: intel: Use correct order for the parameters of devm_kcalloc() 2022-06-06 12:41:28 +01:00
spi-intel.h mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-iproc-qspi.c
spi-jcore.c spi: jcore: Fix trailing statements should be on next line 2021-03-24 19:51:09 +00:00
spi-lantiq-ssc.c spi: Use of_device_get_match_data() 2022-02-21 13:25:19 +00:00
spi-lm70llp.c spi: lm70llp: add parenthesis for sizeof 2021-05-20 18:00:34 +01:00
spi-loopback-test.c spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf' 2021-05-10 13:07:53 +01:00
spi-lp8841-rtc.c
spi-mem.c spi: spi-mem: Fix spi_mem_poll_status() 2022-06-06 12:32:27 +01:00
spi-meson-spicc.c spi: meson-spicc: add IRQ check in meson_spicc_probe 2022-01-26 13:32:36 +00:00
spi-meson-spifc.c spi: spi-meson-spifc: Add missing pm_runtime_disable() in meson_spifc_probe 2022-01-07 13:36:38 +00:00
spi-microchip-core.c spi: microchip-core: switch to use dev_err_probe() 2022-07-13 13:49:00 +01:00
spi-mpc52xx-psc.c spi: mpc52xx-psc: Switch to using core message queue 2022-06-27 13:24:36 +01:00
spi-mpc52xx.c powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode 2022-06-22 12:51:49 +10:00
spi-mpc512x-psc.c spi: mpc512x-psc: Fix compile errors 2022-02-02 16:09:29 +00:00
spi-mt65xx.c spi: mt65xx: Fix definitions indentation 2022-04-19 16:32:14 +01:00
spi-mt7621.c
spi-mtk-nor.c spi: spi-mtk-nor: initialize spi controller after resume 2022-04-12 17:18:51 +01:00
spi-mtk-snfi.c spi: mtk-snfi: preserve dma_mapping_error() error codes 2022-05-03 14:00:38 +01:00
spi-mux.c spi: mux: Fix mux interaction with fast path optimisations 2022-09-02 13:27:13 +01:00
spi-mxic.c spi: mxic: Fix an error handling path in mxic_spi_probe() 2022-04-04 08:45:14 +01:00
spi-mxs.c spi: mxs: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:59 +01:00
spi-npcm-fiu.c spi: npcm-fiu: Add NPCM8XX support 2022-07-20 16:55:26 +01:00
spi-npcm-pspi.c spi: npcm-pspi: Use SPI_MODE_X_MASK 2021-05-11 15:42:48 +01:00
spi-nxp-fspi.c spi: spi-nxp-fspi: don't depend on a specific node name erratum workaround 2021-10-02 01:31:49 +01:00
spi-oc-tiny.c spi: oc-tiny: Use SPI_MODE_X_MASK 2021-05-11 15:42:49 +01:00
spi-omap2-mcspi.c spi: omap2-mcspi: add support for interword delay 2022-05-04 16:02:36 +01:00
spi-omap-100k.c spi: fix some invalid char occurrences 2021-05-20 17:58:33 +01:00
spi-omap-uwire.c ARM: omap1: move perseus spi pinconf to board file 2022-04-21 15:01:08 +02:00
spi-orion.c spi: orion: Add of_node_put() before goto 2021-10-15 16:10:59 +01:00
spi-pic32-sqi.c
spi-pic32.c spi: pic32: Convert to use GPIO descriptors 2022-01-31 15:17:30 +00:00
spi-pl022.c spi: spl022: fix Microwire full duplex mode 2021-10-26 11:53:57 +01:00
spi-ppc4xx.c spi: ppc4xx: add parenthesis for sizeof 2021-05-20 18:00:40 +01:00
spi-pxa2xx-dma.c spi: pxa2xx: Fix style of and typos in the comments and messages 2021-05-18 14:05:35 +01:00
spi-pxa2xx-pci.c spi: pxa2xx-pci: Constify struct pxa_spi_info variables 2022-02-28 12:10:27 +00:00
spi-pxa2xx.c spi: pxa2xx: Add support for Intel Meteor Lake-P 2022-06-30 10:56:31 +01:00
spi-pxa2xx.h spi: pxa2xx: Get rid of unused ->cs_control() 2021-11-29 12:19:59 +00:00
spi-qcom-qspi.c spi: spi-qcom-qspi: Convert to use resource-managed OPP API 2021-03-16 10:14:11 +05:30
spi-qup.c spi: qup: replace spin_lock_irqsave by spin_lock in hard IRQ 2022-03-07 13:16:08 +00:00
spi-rb4xx.c
spi-realtek-rtl.c spi: realtek-rtl: Add support for Realtek RTL838x/RTL839x SPI controllers 2021-02-04 18:45:57 +00:00
spi-rockchip-sfc.c spi: rockchip-sfc: fix platform_get_irq.cocci warning 2022-03-10 12:17:56 +00:00
spi-rockchip.c spi: rockchip: Unmask IRQ at the final to avoid preemption 2022-06-20 11:35:43 +01:00
spi-rpc-if.c spi: rpc-if: Fix RPM imbalance in probe error path 2022-04-04 08:38:59 +01:00
spi-rspi.c spi: spi-rspi: Fix PIO fallback on RZ platforms 2022-07-21 17:21:07 +01:00
spi-s3c24xx-regs.h
spi-s3c24xx.c spi: s3c24xx: Convert to GPIO descriptors 2022-01-24 13:37:34 +00:00
spi-s3c64xx.c spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC 2022-06-29 12:37:08 +01:00
spi-sc18is602.c spi: sc18is602: implement .max_{transfer,message}_size() for the controller 2021-05-21 13:13:33 +01:00
spi-sh-hspi.c
spi-sh-msiof.c spi: sh-msiof: drop unneeded MODULE_ALIAS 2021-09-17 13:17:50 +01:00
spi-sh-sci.c
spi-sh.c spi: sh: Switch to using core message queue 2022-06-27 13:24:35 +01:00
spi-sifive.c spi: sifive: add PM callbacks to support suspend/resume 2022-06-10 13:32:24 +01:00
spi-slave-mt27xx.c spi: mediatek: add mt8195 spi slave support 2021-03-23 17:19:45 +00:00
spi-slave-system-control.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-slave-time.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-sprd-adi.c spi: sprd: Add ADI r3 support 2021-08-26 12:09:38 +01:00
spi-sprd.c spi: spi-sprd: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:57 +01:00
spi-st-ssc4.c spi: st-ssc4: Covert to use GPIO descriptors 2022-02-01 16:08:45 +00:00
spi-stm32-qspi.c spi: stm32-qspi: Remove stm32_qspi_wait_poll_status() unused parameter 2022-06-06 12:39:14 +01:00
spi-stm32.c spi: stm32: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:08 +01:00
spi-sun4i.c spi: sun4i: fix typos in comments 2022-03-15 12:03:58 +00:00
spi-sun6i.c spi: spi-sun6i: Fix chipselect/clock bug 2021-06-23 11:48:36 +01:00
spi-sunplus-sp7021.c spi: remove spin_lock_irq and variable in the irq procress 2022-04-19 13:13:42 +01:00
spi-synquacer.c spi: synquacer: Add missing clk_disable_unprepare() 2022-06-27 23:26:53 +01:00
spi-tegra20-sflash.c spi: spi-tegra20-sflash: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:03 +01:00
spi-tegra20-slink.c spi: tegra20-slink: fix UAF in tegra_slink_remove() 2022-07-13 13:49:03 +01:00
spi-tegra114.c spi: spi-tegra114: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-19 13:13:44 +01:00
spi-tegra210-quad.c spi: tegra210-quad: Multi-cs support 2022-06-13 13:28:29 +01:00
spi-test.h
spi-ti-qspi.c spi: spi-ti-qspi: Support per-transfer and per-slave speed_hz settings 2022-06-06 12:41:36 +01:00
spi-tle62x0.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-topcliff-pch.c spi: topcliff-pch: Use core message validation 2022-06-20 12:43:36 +01:00
spi-uniphier.c spi: uniphier: fix reference count leak in uniphier_spi_probe() 2022-01-26 15:52:05 +00:00
spi-xcomm.c
spi-xilinx.c
spi-xlp.c spi: xlp: Remove Netlogic XLP variants 2021-11-15 13:27:17 +00:00
spi-xtensa-xtfpga.c
spi-zynq-qspi.c spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() 2022-02-08 13:37:50 +00:00
spi-zynqmp-gqspi.c spi: spi-zynqmp-gqspi: Add two chip select support 2022-06-06 12:41:27 +01:00
spi.c spi: mux: Fix mux interaction with fast path optimisations 2022-09-02 13:27:13 +01:00
spidev.c spi: spidev: add SPI_RX_CPHA_FLIP 2022-04-19 13:13:48 +01:00