Mark Brown 9f69ce235f spi: Fix deadlock when adding SPI controllers on SPI buses ... commit 6098475d4cb48d821bdf453c61118c56e26294f0 upstream. Currently we have a global spi_add_lock which we take when adding new devices so that we can check that we're not trying to reuse a chip select that's already controlled. This means that if the SPI device is itself a SPI controller and triggers the instantiation of further SPI devices we trigger a deadlock as we try to register and instantiate those devices while in the process of doing so for the parent controller and hence already holding the global spi_add_lock. Since we only care about concurrency within a single SPI bus move the lock to be per controller, avoiding the deadlock. This can be easily triggered in the case of spi-mux. Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Hardik Gohil <hgohil@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-11-30 02:33:25 +01:00
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atmel-quadspi.c
internals.h
Kconfig
Makefile
spi-altera.c
spi-amd.c
spi-ar934x.c
spi-armada-3700.c
spi-at91-usart.c
spi-ath79.c
spi-atmel.c
spi-au1550.c
spi-axi-spi-engine.c
spi-bcm-qspi.c
spi-bcm-qspi.h
spi-bcm63xx-hsspi.c
spi-bcm63xx.c	Revert "spi: bcm63xx: Enable module autoloading"	2024-11-24 00:23:33 +01:00
spi-bcm2835.c
spi-bcm2835aux.c
spi-bitbang-txrx.h
spi-bitbang.c
spi-brcmstb-qspi.c
spi-butterfly.c
spi-cadence-quadspi.c
spi-cadence.c
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
spi-cavium.h
spi-clps711x.c
spi-coldfire-qspi.c
spi-davinci.c
spi-dln2.c
spi-dw-bt1.c
spi-dw-core.c
spi-dw-dma.c
spi-dw-mmio.c
spi-dw-pci.c
spi-dw.h
spi-efm32.c
spi-ep93xx.c
spi-falcon.c
spi-fsi.c
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c
spi-fsl-espi.c
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c	Revert "spi: lpspi: Silence error message upon deferred probe"	2024-11-24 00:23:19 +01:00
spi-fsl-qspi.c
spi-fsl-spi.c
spi-fsl-spi.h
spi-geni-qcom.c
spi-gpio.c
spi-hisi-sfc-v3xx.c
spi-img-spfi.c
spi-imx.c	Revert "spi: spi-imx: Fix pm_runtime_set_suspended() with runtime pm enabled"	2024-11-24 00:23:05 +01:00
spi-iproc-qspi.c
spi-jcore.c
spi-lantiq-ssc.c
spi-lm70llp.c
spi-loopback-test.c
spi-lp8841-rtc.c
spi-mem.c
spi-meson-spicc.c
spi-meson-spifc.c
spi-mpc52xx-psc.c
spi-mpc52xx.c
spi-mpc512x-psc.c
spi-mt65xx.c
spi-mt7621.c
spi-mtk-nor.c
spi-mux.c
spi-mxic.c
spi-mxs.c
spi-npcm-fiu.c
spi-npcm-pspi.c
spi-nxp-fspi.c	Revert "spi: nxp-fspi: fix the KASAN report out-of-bounds bug"	2024-11-24 00:23:34 +01:00
spi-oc-tiny.c
spi-omap-100k.c
spi-omap-uwire.c
spi-omap2-mcspi.c
spi-orion.c
spi-pic32-sqi.c
spi-pic32.c
spi-pl022.c
spi-ppc4xx.c	Revert "spi: ppc4xx: handle irq_of_parse_and_map() errors"	2024-11-24 00:23:28 +01:00
spi-pxa2xx-dma.c
spi-pxa2xx-pci.c
spi-pxa2xx.c
spi-pxa2xx.h
spi-qcom-qspi.c
spi-qup.c
spi-rb4xx.c
spi-rockchip.c
spi-rpc-if.c
spi-rspi.c
spi-s3c24xx-regs.h
spi-s3c24xx.c
spi-s3c64xx.c	Revert "spi: s3c64xx: fix timeout counters in flush_fifo"	2024-11-24 00:23:05 +01:00
spi-sc18is602.c
spi-sh-hspi.c
spi-sh-msiof.c
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.c
spi-st-ssc4.c
spi-stm32-qspi.c
spi-stm32.c
spi-sun4i.c
spi-sun6i.c
spi-synquacer.c
spi-tegra20-sflash.c
spi-tegra20-slink.c
spi-tegra114.c
spi-test.h
spi-ti-qspi.c
spi-tle62x0.c
spi-topcliff-pch.c
spi-txx9.c
spi-uniphier.c
spi-xcomm.c
spi-xilinx.c
spi-xlp.c
spi-xtensa-xtfpga.c
spi-zynq-qspi.c
spi-zynqmp-gqspi.c
spi.c	spi: Fix deadlock when adding SPI controllers on SPI buses	2024-11-30 02:33:25 +01:00
spidev.c