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2020-09-23spi: spi-imx: spi_imx_transfer(): add support for effective_speed_hzMarc Kleine-Budde1-0/+2
This patch implementes the reporting of the effectivly used speed_hz for the transfer by setting tfr->effective_speed_hz. See the following patch, which adds this feature to the SPI core for more information: 5d7e2b5ed585 spi: core: allow reporting the effectivly used speed_hz for a transfer Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20200917202420.1914104-1-mkl@pengutronix.de Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-22spi: omap2-mcspi: Improve performance waiting for CHSTATAswath Govindraju1-4/+13
This reverts commit 13d515c796 (spi: omap2-mcspi: Switch to readl_poll_timeout()). The amount of time spent polling for the MCSPI_CHSTAT bits to be set on AM335x-icev2 platform is less than 1us (about 0.6us) in most cases, with or without using DMA. So, in most cases the function need not sleep. Also, setting the sleep_usecs to zero would not be optimal here because ktime_add_us() used in readl_poll_timeout() is slower compared to the direct addition used after the revert. So, it is sub-optimal to use readl_poll_timeout in this case. When DMA is not enabled, this revert results in an increase of about 27% in throughput and decrease of about 20% in CPU usage. However, the CPU usage and throughput are almost the same when used with DMA. Therefore, fix this by reverting the commit which switched to using readl_poll_timeout(). Fixes: 13d515c796ad ("spi: omap2-mcspi: Switch to readl_poll_timeout()") Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> Link: https://lore.kernel.org/r/20200910122624.8769-1-a-govindraju@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-22spi: npcm-fiu: simplify the return expression of npcm_fiu_probe()Qinglang Miao1-6/+1
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Link: https://lore.kernel.org/r/20200921131106.93228-1-miaoqinglang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-21spi/topcliff-pch: drop double zeroingJulia Lawall1-2/+2
sg_init_table zeroes its first argument, so the allocation of that argument doesn't have to. the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,n,flags; @@ x = - kcalloc + kmalloc_array (n,sizeof(*x),flags) ... sg_init_table(x,n) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Link: https://lore.kernel.org/r/1600601186-7420-12-git-send-email-Julia.Lawall@inria.fr Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: dw-pci: free previously allocated IRQs if desc->setup() failsJay Fang1-7/+9
Free previously allocated IRQs when return an error code of desc->setup() which is not always successful. And simplify the code by adding a goto label. Fixes: 8f5c285f3ef5 ("SPI: designware: pci: Switch over to MSI interrupts") CC: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Jay Fang <f.fangjian@huawei.com> Link: https://lore.kernel.org/r/1600132969-53037-1-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: spi-nxp-fspi: Add ACPI supportkuldip dwivedi1-19/+50
Currently NXP fspi driver has support of DT only. Adding ACPI support to the driver so that it can be used by UEFI firmware booting in ACPI mode. This driver will be probed if any firmware will expose HID "NXP0009" in DSDT table. Signed-off-by: kuldip dwivedi <kuldip.dwivedi@puresoftware.com> Reviewed-by: Ashish Kumar <Ashish.Kumar@nxp.com> Link: https://lore.kernel.org/r/20200911130331.6313-1-kuldip.dwivedi@puresoftware.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: lantiq: remove redundant irqsave and irqrestore in hardIRQBarry Song1-7/+5
Running in hardIRQ, disabling irq is redundant. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20200916101042.21860-1-song.bao.hua@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: xilinx: Fix info message during probeRicardo Ribalda1-2/+1
The info message was showing the mapped address of the device. To avoid security problems, all virtual addresses are converted to __ptrval__, so the message was useless/ugly: [ 2.304949] xilinx_spi b0010000.spi-flash: at 0xB0010000 mapped to 0x(____ptrval____), irq=37 Use %pR instead: [ 15.021354] xilinx_spi b0010000.spi-flash: at [mem 0xb0010000-0xb001ffff], irq=37 Signed-off-by: Ricardo Ribalda <ribalda@kernel.org> Acked-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/20200915112936.320647-1-ribalda@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: fsi2spi: Add compatible string for restricted versionEddie James1-0/+1
Add a compatible string for the restricted version of the SPI controller. The restricted version cannot process sequence loop operations and therefore has a smaller transfer size. Signed-off-by: Eddie James <eajames@linux.ibm.com> Link: https://lore.kernel.org/r/20200909222857.28653-5-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Check mux status before transfersEddie James1-13/+27
The SPI controllers are not accessible if the mux isn't set. Therefore, check the mux status before starting a transfer and fail out if it isn't set. Signed-off-by: Eddie James <eajames@linux.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-7-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Implement restricted size for certain controllersEddie James1-12/+53
Some of the FSI-attached SPI controllers cannot use the loop command in programming the sequencer due to security requirements. Check the devicetree compatibility that indicates this condition and restrict the size for these controllers. Also, add more transfers directly in the sequence up to the length of the sequence register. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-6-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Fix use of the bneq+ sequencer instructionBrad Bishop1-3/+25
All of the switches in N2_count_control in the counter configuration are required to make the branch if not equal and increment command work. Set them when using bneq+. A side effect of this mode requires a dummy write to TDR when both transmitting and receiving otherwise the controller won't start shifting receive data. It is likely not possible to avoid TDR underrun errors in this mode and they are harmless, so do not check for them. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-4-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Fix clock running too fastBrad Bishop1-1/+1
Use a clock divider tuned to a 200MHz FSI bus frequency (the maximum). Use of the previous divider at 200MHz results in corrupt data from endpoint devices. Ideally the clock divider would be calculated from the FSI clock, but that would require some significant work on the FSI driver. With FSI frequencies slower than 200MHz, the SPI clock will simply run slower, but safely. Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-3-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Handle 9 to 15 byte transfers lengthsBrad Bishop1-3/+3
The trailing <len> - 8 bytes of transfer data in this size range is no longer ignored. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-2-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: sprd: Simplify with dev_err_probe()Krzysztof Kozlowski2-16/+6
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20200910160706.5883-1-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Don't wait to start 1st transfer if transmittingDouglas Anderson1-81/+86
If we're sending bytes over SPI, we know the FIFO is empty at the start of the transfer. There's no reason to wait for the interrupt telling us to start--we can just start right away. Then if we transmit everything in one swell foop we don't even need to bother listening for TX interrupts. In a test of "flashrom -p ec -r /tmp/foo.bin" interrupts were reduced from ~30560 to ~29730, about a 3% savings. This patch looks bigger than it is because I moved a few functions rather than adding a forward declaration. The only actual change to geni_spi_handle_tx() was to make it return a bool indicating if there is more to tx. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Akash Asthana <akashast@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912111716.1.Ied5e843fad0d6b733a1fb8bcfb364dd2fa889eb3@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm2835: Make polling_limit_us staticJason Yan1-1/+1
This eliminates the following sparse warning: drivers/spi/spi-bcm2835.c:78:14: warning: symbol 'polling_limit_us' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Link: https://lore.kernel.org/r/20200912072211.602735-1-yanaijie@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-fsl-dspi: use XSPI mode instead of DMA for DPAA2 SoCsVladimir Oltean1-3/+3
The arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi device tree lacks DMA channels for DSPI, so naturally, the driver fails to probe: [ 2.945302] fsl-dspi 2100000.spi: rx dma channel not available [ 2.951134] fsl-dspi 2100000.spi: can't get dma channels In retrospect, this should have been obvious, because LS2080A, LS2085A LS2088A and LX2160A don't appear to have an eDMA module at all. Looking again at their datasheets, the CTARE register (which is specific to XSPI functionality) seems to be documented, so switch them to XSPI mode instead. Fixes: 0feaf8f5afe0 ("spi: spi-fsl-dspi: Convert the instantiations that support it to DMA") Reported-by: Qiang Zhao <qiang.zhao@nxp.com> Tested-by: Qiang Zhao <qiang.zhao@nxp.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20200910121532.1138596-1-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Don't program CS_TOGGLE again and againDouglas Anderson1-5/+7
We always toggle the chip select manually in spi-geni-qcom so that we can properly implement the Linux API. There's no reason to program this to the hardware on every transfer. Program it once at init and be done with it. This saves some part of a microsecond of overhead on each transfer. While not really noticeable on any real world benchmarks, we might as well save the time. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912140730.2.I33e571179986850b4ec17042e813d0b08fb1b9c1@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Use the FIFO even moreDouglas Anderson1-1/+1
In commit 902481a78ee4 ("spi: spi-geni-qcom: Actually use our FIFO") I explained that the maximum size we could program the FIFO was "mas->tx_fifo_depth - 3" but that I chose "mas->tx_fifo_depth()" because I was worried about decreased bandwidth. Since that time: * All the interconnect patches have landed, making things run at the proper speed. * I've done more measurements. This lets me confirm that there's really no downside of using the FIFO more. Specifically I did "flashrom -p ec -r /tmp/foo.bin" on a Chromebook and averaged over several runs. Before: It took 6.66 seconds and 59669 interrupts fired. After: It took 6.66 seconds and 47992 interrupts fired. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912140730.1.Ie67fa32009b94702d56232c064f1d89065ee8836@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-qcom-qspi: replace spin_lock_irqsave by spin_lock in hard IRQBarry Song1-3/+2
It is redundant to do irqsave and irqrestore in hardIRQ context. Cc: Andy Gross <agross@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20200910100246.32696-1-song.bao.hua@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: Add compatible string for brcmstb SoCsRay Jui1-0/+2
Add compatible string for brcmstb 7445 SoCs. Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-1-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Clean up 7425, 7429, and 7435 settingsRay Jui1-12/+0
The Broadcom QSPI driver now falls back to no MSPI_DEV support as the default setting in the generic compatible string, explicit settings for STB chips 7425, 7429, and 7435 can be removed. Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-4-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Fix probe regression on iProc platformsRay Jui1-1/+1
iProc chips have QSPI controller that does not have the MSPI_REV offset. Reading from that offset will cause a bus error. Fix it by having MSPI_REV query disabled in the generic compatible string. Fixes: 3a01f04d74ef ("spi: bcm-qspi: Handle lack of MSPI_REV offset") Link: https://lore.kernel.org/linux-arm-kernel/20200909211857.4144718-1-f.fainelli@gmail.com/T/#u Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-3-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Add compatible string for BRCMSTB 7445 SoCsRay Jui1-0/+5
Add compatible string for BRCMSTB 7445 SoCs and indicate it has MSPI rev support. Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-2-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: qup: remove redundant assignment to variable retColin Ian King1-1/+1
The variable ret is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20200910150410.750959-1-colin.king@canonical.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-09spi: spidev: Remove redundant initialization of variable statusJay Fang1-2/+2
In spidev_read() and spidev_write(), the variable status is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Signed-off-by: Jay Fang <f.fangjian@huawei.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/1599631704-53232-1-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-09spi: spi-qcom-qspi: Unconditionally call dev_pm_opp_of_remove_table()Viresh Kumar1-9/+6
dev_pm_opp_of_remove_table() doesn't report any errors when it fails to find the OPP table with error -ENODEV (i.e. OPP table not present for the device). And we can call dev_pm_opp_of_remove_table() unconditionally here. While at it, create a new label and put clkname on errors. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/b77aa0bbe82a580508e321a34da488b4b27966d0.1598594714.git.viresh.kumar@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-09spi: spi-geni-qcom: Unconditionally call dev_pm_opp_of_remove_table()Viresh Kumar1-8/+5
dev_pm_opp_of_remove_table() doesn't report any errors when it fails to find the OPP table with error -ENODEV (i.e. OPP table not present for the device). And we can call dev_pm_opp_of_remove_table() unconditionally here. While at it, create a new label and put clkname on errors. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/ea0864d41277e61fa31d304fbd4cf9af6b314269.1598594714.git.viresh.kumar@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: spi-mtk-nor: support standard spi propertiesIkjoon Jang1-13/+16
Use default supports_op() to support spi-[rt]x-bus-width properties. And check dummy op's byte length instead of its bus width for output. Signed-off-by: Ikjoon Jang <ikjn@chromium.org> Link: https://lore.kernel.org/r/20200826091852.519138-1-ikjn@chromium.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: tegra20: Simplify with dev_err_probe()Krzysztof Kozlowski1-7/+3
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-11-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: tegra114: Simplify with dev_err_probe()Krzysztof Kozlowski1-8/+3
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-10-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: synquacer: Simplify with dev_err_probe()Krzysztof Kozlowski1-3/+2
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-9-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: stm32: Simplify with dev_err_probe()Krzysztof Kozlowski1-3/+1
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-8-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: qcom-qspi: Simplify with dev_err_probe()Krzysztof Kozlowski1-3/+2
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-7-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: spi-mux: Simplify with dev_err_probe()Krzysztof Kozlowski1-3/+2
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-6-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: cadence-quadspi: Simplify with dev_err_probe()Krzysztof Kozlowski1-4/+1
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200901152713.18629-5-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: bcm2835: Simplify with dev_err_probe()Krzysztof Kozlowski1-5/+2
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200901152713.18629-4-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: atmel: Simplify with dev_err_probe()Krzysztof Kozlowski1-3/+2
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20200901152713.18629-3-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: sprd: Release DMA channel also on probe deferralKrzysztof Kozlowski1-1/+1
If dma_request_chan() for TX channel fails with EPROBE_DEFER, the RX channel would not be released and on next re-probe it would be requested second time. Fixes: 386119bc7be9 ("spi: sprd: spi: sprd: Add DMA mode support") Cc: <stable@vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20200901152713.18629-1-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08dt-bindings: snps, dw-apb-ssi: Add sparx5 support, plus rx-sample-delay-ns propertyLars Povlsen1-0/+21
This has the following changes for the snps,dw-apb-ss DT bindings: - Add "microchip,sparx5-spi" as the compatible for the Sparx5 SoC controller - Add the property "rx-sample-delay-ns" Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20200824203010.2033-5-lars.povlsen@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: dw: Add Microchip Sparx5 supportLars Povlsen1-1/+69
This adds SPI support for the Sparx5 SoC, which is using the MMIO Designware SPI controller. The Sparx5 differs from the Ocelot version in these areas: * The CS override is controlled by a new set of registers for this purpose. * The Sparx5 SPI controller has the RX sample delay register, and it must be configured for the (SPI NAND) device on SPI2. * The Sparx5 SPI controller has 2 different SPI bus interfaces on the same controller (don't ask...). The "spi-mux" driver should be used in conjunction with the SPI driver to select the appropriate bus. Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com> Link: https://lore.kernel.org/r/20200824203010.2033-3-lars.povlsen@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-08spi: dw: Add support for RX sample delay registerLars Povlsen2-0/+29
This add support for the RX_SAMPLE_DLY register. If enabled in the Designware IP, it allows tuning of the rx data signal by means of an internal rx sample fifo. The register is controlled by the rx-sample-delay-ns DT property, which is defined per SPI slave as well on controller level. The controller level rx-sample-delay-ns will apply to all slaves without the property explicitly defined. The register is located at offset 0xf0, and if the option is not enabled in the IP, changing the register will have no effect. The register will only be written if any slave defines a nonzero value (after scaling by the clock period). Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com> Link: https://lore.kernel.org/r/20200824203010.2033-2-lars.povlsen@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-07spi: qup: Allow for compile-testing on !ARMAlex Dewar1-1/+1
There seems no reason to restrict testing to ARM, so remove this constraint to improve test coverage. Build-tested with allyesconfig on x86. Signed-off-by: Alex Dewar <alex.dewar90@gmail.com> Link: https://lore.kernel.org/r/20200904163709.110975-1-alex.dewar90@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-06Linux 5.9-rc4Linus Torvalds1-1/+1
2020-09-05io_uring: fix linked deferred ->files cancellationPavel Begunkov1-2/+23
While looking for ->files in ->defer_list, consider that requests there may actually be links. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-05io_uring: fix cancel of deferred reqs with ->filesPavel Begunkov1-0/+27
While trying to cancel requests with ->files, it also should look for requests in ->defer_list, otherwise it might end up hanging a thread. Cancel all requests in ->defer_list up to the last request there with matching ->files, that's needed to follow drain ordering semantics. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-05include/linux/log2.h: add missing () around n in roundup_pow_of_two()Jason Gunthorpe1-1/+1
Otherwise gcc generates warnings if the expression is complicated. Fixes: 312a0c170945 ("[PATCH] LOG2: Alter roundup_pow_of_two() so that it can use a ilog2() on a constant") Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: https://lkml.kernel.org/r/0-v1-8a2697e3c003+41165-log_brackets_jgg@nvidia.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-09-05mm/khugepaged.c: fix khugepaged's request size in collapse_fileDavid Howells1-1/+1
collapse_file() in khugepaged passes PAGE_SIZE as the number of pages to be read to page_cache_sync_readahead(). The intent was probably to read a single page. Fix it to use the number of pages to the end of the window instead. Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS") Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Yang Shi <shy828301@gmail.com> Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: Eric Biggers <ebiggers@google.com> Link: https://lkml.kernel.org/r/20200903140844.14194-2-willy@infradead.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-09-05mm/hugetlb: fix a race between hugetlb sysctl handlersMuchun Song1-6/+20
There is a race between the assignment of `table->data` and write value to the pointer of `table->data` in the __do_proc_doulongvec_minmax() on the other thread. CPU0: CPU1: proc_sys_write hugetlb_sysctl_handler proc_sys_call_handler hugetlb_sysctl_handler_common hugetlb_sysctl_handler table->data = &tmp; hugetlb_sysctl_handler_common table->data = &tmp; proc_doulongvec_minmax do_proc_doulongvec_minmax sysctl_head_finish __do_proc_doulongvec_minmax unuse_table i = table->data; *i = val; // corrupt CPU1's stack Fix this by duplicating the `table`, and only update the duplicate of it. And introduce a helper of proc_hugetlb_doulongvec_minmax() to simplify the code. The following oops was seen: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page Code: Bad RIP value. ... Call Trace: ? set_max_huge_pages+0x3da/0x4f0 ? alloc_pool_huge_page+0x150/0x150 ? proc_doulongvec_minmax+0x46/0x60 ? hugetlb_sysctl_handler_common+0x1c7/0x200 ? nr_hugepages_store+0x20/0x20 ? copy_fd_bitmaps+0x170/0x170 ? hugetlb_sysctl_handler+0x1e/0x20 ? proc_sys_call_handler+0x2f1/0x300 ? unregister_sysctl_table+0xb0/0xb0 ? __fd_install+0x78/0x100 ? proc_sys_write+0x14/0x20 ? __vfs_write+0x4d/0x90 ? vfs_write+0xef/0x240 ? ksys_write+0xc0/0x160 ? __ia32_sys_read+0x50/0x50 ? __close_fd+0x129/0x150 ? __x64_sys_write+0x43/0x50 ? do_syscall_64+0x6c/0x200 ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fixes: e5ff215941d5 ("hugetlb: multiple hstates for multiple page sizes") Signed-off-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20200828031146.43035-1-songmuchun@bytedance.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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