Lukas Wunner ddf75be47c spi: Prevent adding devices below an unregistering controller ... CONFIG_OF_DYNAMIC and CONFIG_ACPI allow adding SPI devices at runtime using a DeviceTree overlay or DSDT patch. CONFIG_SPI_SLAVE allows the same via sysfs. But there are no precautions to prevent adding a device below a controller that's being removed. Such a device is unusable and may not even be able to unbind cleanly as it becomes inaccessible once the controller has been torn down. E.g. it is then impossible to quiesce the device's interrupt. of_spi_notify() and acpi_spi_notify() do hold a ref on the controller, but otherwise run lockless against spi_unregister_controller(). Fix by holding the spi_add_lock in spi_unregister_controller() and bailing out of spi_add_device() if the controller has been unregistered concurrently. Fixes: ce79d54ae4 ("spi/of: Add OF notifier handler") Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: stable@vger.kernel.org # v3.19+ Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Octavian Purdila <octavian.purdila@intel.com> Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Link: https://lore.kernel.org/r/a8c3205088a969dc8410eec1eba9aface60f36af.1596451035.git.lukas@wunner.de Signed-off-by: Mark Brown <broonie@kernel.org>		2020-08-03 16:50:43 +01:00
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Kconfig	spi: Prevent adding devices below an unregistering controller	2020-08-03 16:50:43 +01:00
Makefile	Merge series "mtd: spi-nor: Move cadence-qaudspi to spi-mem framework" from Vignesh Raghavendra <vigneshr@ti.com>:	2020-06-19 14:26:55 +01:00
atmel-quadspi.c	spi: atmel-quadspi: Use optimezed memcpy_fromio()/memcpy_toio()	2020-07-17 00:55:24 +01:00
internals.h	…
spi-altera.c	spi: altera: fix module autoload	2020-06-24 16:37:47 +01:00
spi-amd.c	spi: spi-amd: Do not define 'struct acpi_device_id' when !CONFIG_ACPI	2020-07-17 16:38:56 +01:00
spi-ar934x.c	…
spi-armada-3700.c	spi: a3700: make a3700_spi_init() return void	2020-05-06 15:55:13 +01:00
spi-at91-usart.c	spi: spi-at91-usart: Remove unused OF table 'struct of_device_id'	2020-07-17 16:38:54 +01:00
spi-ath79.c	…
spi-atmel.c	spi: atmel: remove redundant label out_free	2020-07-09 22:41:11 +01:00
spi-au1550.c	…
spi-axi-spi-engine.c	spi: spi-axi-spi-engine: Access register after clock initialization	2020-04-09 18:46:53 +01:00
spi-bcm-qspi.c	Merge branch 'for-5.7' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.8	2020-05-05 11:48:25 +01:00
spi-bcm-qspi.h	…
spi-bcm63xx-hsspi.c	spi: bcm63xx-hsspi: add reset support	2020-06-17 14:29:58 +01:00
spi-bcm63xx.c	spi: bcm63xx-spi: add reset support	2020-06-17 14:29:58 +01:00
spi-bcm2835.c	spi: bcm2835: support effective_speed_hz	2020-07-17 00:30:44 +01:00
spi-bcm2835aux.c	spi: bcm2835aux: support effective_speed_hz	2020-07-17 00:30:45 +01:00
spi-bitbang-txrx.h	…
spi-bitbang.c	spi: spi-bitbang: Demote obvious misuse of kerneldoc to standard comment blocks	2020-07-17 16:38:45 +01:00
spi-brcmstb-qspi.c	…
spi-butterfly.c	…
spi-cadence-quadspi.c	spi: Move cadence-quadspi driver to drivers/spi/	2020-06-19 14:26:54 +01:00
spi-cadence.c	spi: spi-cadence: add support for chip select high	2020-07-22 01:55:51 +01:00
spi-cavium-octeon.c	…
spi-cavium-thunderx.c	spi: spi-cavium-thunderx: flag controller as half duplex	2020-06-16 00:38:39 +01:00
spi-cavium.c	…
spi-cavium.h	…
spi-clps711x.c	…
spi-coldfire-qspi.c	spi: coldfire-qspi: Use clk_prepare_enable and clk_disable_unprepare	2020-07-17 00:55:26 +01:00
spi-davinci.c	spi: spi-davinci: Fix a few kerneldoc misspellings and API slippages	2020-07-17 16:38:46 +01:00
spi-dln2.c	…
spi-dw-core.c	Merge remote-tracking branch 'spi/for-5.8' into spi-next	2020-05-30 00:03:53 +01:00
spi-dw-dma.c	spi: dw: Refactor mid_spi_dma_setup() to separate DMA and IRQ config	2020-05-29 20:04:04 +01:00
spi-dw-mmio.c	Merge series "spi: dw: Add generic DW DMA controller support" from Serge Semin <Sergey.Semin@baikalelectronics.ru>:	2020-05-29 17:49:56 +01:00
spi-dw-pci.c	spi: dw: Cleanup generic DW DMA code namings	2020-05-29 15:55:52 +01:00
spi-dw.h	spi: dw: Use regset32 DebugFS method to create regdump file	2020-05-29 15:55:54 +01:00
spi-efm32.c	…
spi-ep93xx.c	spi: spi-ep93xx: Fix API slippage	2020-07-17 16:38:47 +01:00
spi-falcon.c	…
spi-fsi.c	…
spi-fsl-cpm.c	…
spi-fsl-cpm.h	…
spi-fsl-dspi.c	spi: spi-fsl-dspi: Initialize completion before possible interrupt	2020-06-22 13:50:29 +01:00
spi-fsl-espi.c	…
spi-fsl-lib.c	…
spi-fsl-lib.h	…
spi-fsl-lpspi.c	spi: lpspi: fix using CS discontinuously on i.MX8DXLEVK	2020-07-29 14:40:54 +01:00
spi-fsl-qspi.c	spi: Fix SPI NOR and SPI NAND acronyms	2020-07-17 00:55:25 +01:00
spi-fsl-spi.c	spi: fsl: add missing __iomem annotation	2020-07-01 23:21:26 +01:00
spi-fsl-spi.h	…
spi-geni-qcom.c	spi: spi-geni-qcom: Set an autosuspend delay of 250 ms	2020-07-07 14:11:01 +01:00
spi-gpio.c	…
spi-hisi-sfc-v3xx.c	spi: hisi-sfc-v3xx: add error check after per operation	2020-04-17 14:21:00 +01:00
spi-img-spfi.c	spi: img-spfi: Convert to use GPIO descriptors	2020-07-01 23:21:29 +01:00
spi-imx.c	spi: imx: enable runtime pm support	2020-07-27 14:55:20 +01:00
spi-iproc-qspi.c	…
spi-jcore.c	…
spi-lantiq-ssc.c	spi: lantiq: Add support to Lightning Mountain SoC	2020-07-22 01:55:59 +01:00
spi-lm70llp.c	…
spi-loopback-test.c	spi: spi-loopback-test: Fix formatting issues in function header blocks	2020-07-17 16:38:44 +01:00
spi-lp8841-rtc.c	…
spi-mem.c	spi: spi-mem: allow specifying a command's extension	2020-07-14 17:29:38 +01:00
spi-meson-spicc.c	spi: spi-meson-spicc: Remove set but never used variable 'data' from meson_spicc_reset_fifo()	2020-07-17 16:38:48 +01:00
spi-meson-spifc.c	spi: spi-meson-spifc: Fix misdocumenting of 'dev' in 'struct meson_spifc'	2020-07-17 16:38:48 +01:00
spi-mpc52xx-psc.c	…
spi-mpc52xx.c	…
spi-mpc512x-psc.c	…
spi-mt65xx.c	spi: mediatek: add spi support for mt8192 IC	2020-07-22 01:56:00 +01:00
spi-mt7621.c	…
spi-mtk-nor.c	spi: spi-mtk-nor: reject DTR ops	2020-07-14 17:29:40 +01:00
spi-mux.c	spi: mux: repair mux usage	2020-05-25 13:25:34 +01:00
spi-mxic.c	spi: spi-mem: allow specifying a command's extension	2020-07-14 17:29:38 +01:00
spi-mxs.c	…
spi-npcm-fiu.c	spi: npcm-fiu: Reuse BITS_PER_BYTE definition	2020-06-19 13:43:08 +01:00
spi-npcm-pspi.c	spi: npcm-pspi: Convert to use GPIO descriptors	2020-07-01 23:21:28 +01:00
spi-nxp-fspi.c	…
spi-oc-tiny.c	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
spi-omap-100k.c	spi: omap-100k: Drop include	2020-07-14 17:38:46 +01:00
spi-omap-uwire.c	spi: omap-uwire: Use clk_prepare_enable and clk_disable_unprepare	2020-07-15 15:58:33 +01:00
spi-omap2-mcspi.c	spi: omap2-mcspi: Convert to use GPIO descriptors	2020-06-29 19:14:07 +01:00
spi-orion.c	spi: Fix SPI NOR and SPI NAND acronyms	2020-07-17 00:55:25 +01:00
spi-pic32-sqi.c	…
spi-pic32.c	…
spi-pl022.c	spi: spi-pl022: Provide missing struct attribute/function param docs	2020-07-17 16:38:50 +01:00
spi-ppc4xx.c	spi: ppc4xx: Convert to use GPIO descriptors	2020-07-22 01:55:52 +01:00
spi-pxa2xx-dma.c	…
spi-pxa2xx-pci.c	…
spi-pxa2xx.c	spi: spi-pxa2xx: Do not define 'struct acpi_device_id' when !CONFIG_ACPI	2020-07-17 16:38:55 +01:00
spi-pxa2xx.h	…
spi-qcom-qspi.c	…
spi-qup.c	…
spi-rb4xx.c	spi: rb4xx: update driver to be device tree aware	2020-05-22 14:13:17 +01:00
spi-rockchip.c	spi: rockchip: Fix error in SPI slave pio read	2020-07-28 17:29:31 +01:00
spi-rpc-if.c	spi: add Renesas RPC-IF driver	2020-06-16 00:38:38 +01:00
spi-rspi.c	spi: rspi: Use requested instead of maximum bit rate	2020-06-09 12:26:33 +01:00
spi-s3c24xx-fiq.S	…
spi-s3c24xx-fiq.h	…
spi-s3c24xx.c	…
spi-s3c64xx.c	spi: spi-s3c64xx: Add missing entries for structs 's3c64xx_spi_dma_data' and 's3c64xx_spi_dma_data'	2020-07-17 16:38:49 +01:00
spi-sc18is602.c	spi: sc18is602: Fix a typo in MODULE_DESCRIPTION	2020-04-14 12:39:37 +01:00
spi-sh-hspi.c	…
spi-sh-msiof.c	spi: spi-sh-msiof: Fix checkpatch error Complex macros should use ()	2020-04-14 18:36:34 +01:00
spi-sh-sci.c	…
spi-sh.c	…
spi-sifive.c	…
spi-sirf.c	…
spi-slave-mt27xx.c	…
spi-slave-system-control.c	…
spi-slave-time.c	…
spi-sprd-adi.c	spi: sprd: switch the sequence of setting WDG_LOAD_LOW and _HIGH	2020-06-02 11:45:11 +01:00
spi-sprd.c	…
spi-st-ssc4.c	…
spi-stm32-qspi.c	spi: stm32-qspi: Fix error path in case of -EPROBE_DEFER	2020-06-17 13:26:41 +01:00
spi-stm32.c	spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4	2020-05-25 15:56:16 +01:00
spi-sun4i.c	spi: sun4i: update max transfer size reported	2020-07-27 14:55:21 +01:00
spi-sun6i.c	spi: spi-sun6i: sun6i_spi_transfer_one(): enable RF_RDY interrupt only if needed	2020-07-07 10:41:41 +01:00
spi-synquacer.c	…
spi-tegra20-sflash.c	spi: tegra20-sflash: Fix runtime PM imbalance on error	2020-05-28 14:01:16 +01:00
spi-tegra20-slink.c	spi: tegra20-slink: Fix runtime PM imbalance on error	2020-05-28 14:01:15 +01:00
spi-tegra114.c	spi: tegra114: Fix runtime PM imbalance on error	2020-05-28 14:01:14 +01:00
spi-test.h	…
spi-ti-qspi.c	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
spi-tle62x0.c	…
spi-topcliff-pch.c	spi: spi-topcliff-pch: drop call to wakeup-disable	2020-07-28 17:29:29 +01:00
spi-txx9.c	…
spi-uniphier.c	spi: uniphier: Use devm_platform_get_and_ioremap_resource() to simplify code	2020-05-11 18:17:52 +01:00
spi-xcomm.c	…
spi-xilinx.c	…
spi-xlp.c	…
spi-xtensa-xtfpga.c	…
spi-zynq-qspi.c	spi: spi-zynq-qspi: Add description for 2 missing attributes/parameters	2020-07-17 16:38:51 +01:00
spi-zynqmp-gqspi.c	spi: spi-zynqmp-gqspi: Correct a couple of misspellings in kerneldoc	2020-07-17 16:38:52 +01:00
spi.c	spi: Prevent adding devices below an unregistering controller	2020-08-03 16:50:43 +01:00
spidev.c	spi: spidev: Align buffers for DMA	2020-07-28 17:29:28 +01:00