Lukas Wunner 1513ceee70 spi: bcm2835: Drop dma_pending flag ... The BCM2835 SPI driver uses a flag to keep track of whether a DMA transfer is in progress. The flag is used to avoid terminating DMA channels multiple times if a transfer finishes orderly while simultaneously the SPI core invokes the ->handle_err() callback because the transfer took too long. However terminating DMA channels multiple times is perfectly fine, so the flag is unnecessary for this particular purpose. The flag is also used to avoid invoking bcm2835_spi_undo_prologue() multiple times under this race condition. However multiple *concurrent* invocations can no longer happen since commit 2527704d84 ("spi: bcm2835: Synchronize with callback on DMA termination") because the ->handle_err() callback now uses the _sync() variant when terminating DMA channels. The only raison d'être of the flag is therefore that bcm2835_spi_undo_prologue() cannot cope with multiple *sequential* invocations. Achieve that by setting tx_prologue to 0 at the end of the function. Subsequent invocations thus become no-ops. With that, the dma_pending flag becomes unnecessary, so drop it. Tested-by: Nuno Sá <nuno.sa@analog.com> Tested-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Lukas Wunner <lukas@wunner.de> Acked-by: Stefan Wahren <wahrenst@gmx.net> Acked-by: Martin Sperl <kernel@martin.sperl.org> Link: https://lore.kernel.org/r/062b03b7f86af77a13ce0ec3b22e0bdbfcfba10d.1568187525.git.lukas@wunner.de Signed-off-by: Mark Brown <broonie@kernel.org>		2019-09-11 15:52:33 +01:00
..
atmel-quadspi.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
internals.h	spi: Add an helper to flush the message queue	2018-04-23 15:48:18 +01:00
Kconfig	spi: npcm-fiu: add NPCM FIU controller driver	2019-08-30 12:42:07 +01:00
Makefile	spi: npcm-fiu: add NPCM FIU controller driver	2019-08-30 12:42:07 +01:00
spi-altera.c	spi: altera: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:14:50 +01:00
spi-armada-3700.c	spi: a3700: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:15:09 +01:00
spi-at91-usart.c	spi: at91-usart: add DMA support	2019-05-08 17:45:26 +09:00
spi-ath79.c	spi: ath79: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:15:29 +01:00
spi-atmel.c	spi: atmel: add tracing to custom .transfer_one_message callback	2019-08-02 12:16:02 +01:00
spi-au1550.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-axi-spi-engine.c	spi: spi-axi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:15:49 +01:00
spi-bcm63xx-hsspi.c	spi: bcm63xx-hsspi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:16:47 +01:00
spi-bcm63xx.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-bcm2835.c	spi: bcm2835: Drop dma_pending flag	2019-09-11 15:52:33 +01:00
spi-bcm2835aux.c	spi: bcm2835aux: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:16:08 +01:00
spi-bcm-qspi.c	spi: bcm-qspi: Make BSPI default mode	2019-08-30 12:42:20 +01:00
spi-bcm-qspi.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459	2019-06-19 17:09:09 +02:00
spi-bitbang-txrx.h
spi-bitbang.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00
spi-brcmstb-qspi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459	2019-06-19 17:09:09 +02:00
spi-butterfly.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-cadence.c	spi: cadence: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:17:07 +01:00
spi-cavium-octeon.c	spi: octeon: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:17:27 +01:00
spi-cavium-thunderx.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
spi-cavium.c
spi-cavium.h
spi-clps711x.c	spi: clps711x: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:17:36 +01:00
spi-coldfire-qspi.c	spi: coldfire-qspi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:17:56 +01:00
spi-davinci.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-dln2.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372	2019-06-05 17:37:10 +02:00
spi-dw-mid.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
spi-dw-mmio.c	spi: dw-mmio: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:05 +01:00
spi-dw-pci.c	Merge branch 'spi-5.3' into spi-5.4	2019-08-23 12:00:22 +01:00
spi-dw.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
spi-dw.h	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-efm32.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-ep93xx.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-falcon.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-fsl-cpm.c	spi: fsl-spi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:24:26 +01:00
spi-fsl-cpm.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-fsl-dspi.c	spi: spi-fsl-dspi: Fix race condition in TCFQ/EOQ interrupt	2019-09-03 12:40:05 +01:00
spi-fsl-espi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-fsl-lib.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-fsl-lib.h	spi: fsl: Convert to use CS GPIO descriptors	2019-08-28 14:10:41 +01:00
spi-fsl-lpspi.c	spi: fsl-lpspi: Clean up fsl_lpspi_probe	2019-04-08 14:08:53 +07:00
spi-fsl-qspi.c	Merge branch 'spi-5.3' into spi-5.4	2019-08-23 12:00:22 +01:00
spi-fsl-spi.c	spi: fsl: Convert to use CS GPIO descriptors	2019-08-28 14:10:41 +01:00
spi-fsl-spi.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-geni-qcom.c	spi: spi-geni-qcom: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:25 +01:00
spi-gpio.c	spi-gpio: Use PTR_ERR_OR_ZERO() in spi_gpio_request()	2019-09-09 11:05:39 +01:00
spi-img-spfi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422	2019-06-05 17:37:15 +02:00
spi-imx.c	Merge branch 'spi-5.1' into spi-5.2 for stm32	2019-03-15 17:06:34 +00:00
spi-iproc-qspi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
spi-jcore.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
spi-lantiq-ssc.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-lm70llp.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-loopback-test.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-lp8841-rtc.c	spi: lp-8841: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:35 +01:00
spi-mem.c	spi-mem: fix kernel-doc for spi_mem_dirmap_{read|write}()	2019-04-08 14:06:51 +07:00
spi-meson-spicc.c	spi: meson-spicc: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:55 +01:00
spi-meson-spifc.c	spi: spi-meson-spifc: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:19:14 +01:00
spi-mpc52xx-psc.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-mpc52xx.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428	2019-06-05 17:37:16 +02:00
spi-mpc512x-psc.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
spi-mt65xx.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-mt7621.c	spi: mt7621: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:19:34 +01:00
spi-mxic.c	spi: mxic: simplify getting .driver_data	2019-03-20 17:20:29 +00:00
spi-mxs.c	spi: mxs: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:19:54 +01:00
spi-npcm-fiu.c	spi: npcm-fiu: remove set but not used variable 'retlen'	2019-09-05 18:19:45 +01:00
spi-npcm-pspi.c	spi: npcm: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:20:03 +01:00
spi-nuc900.c	spi: nuc900: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:20:23 +01:00
spi-nxp-fspi.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-oc-tiny.c	spi: oc-tiny: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:20:33 +01:00
spi-omap2-mcspi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-omap-100k.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-omap-uwire.c
spi-orion.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-pic32-sqi.c	spi: pic32-sqi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:20:52 +01:00
spi-pic32.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-pl022.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-ppc4xx.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-pxa2xx-dma.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-pxa2xx-pci.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
spi-pxa2xx.c	spi: pxa2xx: Add support for Intel Tiger Lake	2019-08-02 12:14:23 +01:00
spi-pxa2xx.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-qcom-qspi.c	spi: spi-qcom-qspi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:12 +01:00
spi-qup.c	Merge branch 'spi-5.3' into spi-next	2019-07-04 17:35:07 +01:00
spi-rb4xx.c	spi: rb4xx: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:21 +01:00
spi-rockchip.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00
spi-rspi.c	spi: rspi: Fix handling of QSPI code when transmit and receive	2019-05-02 10:38:44 +09:00
spi-s3c24xx-fiq.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-s3c24xx-fiq.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-s3c24xx.c	spi: s3c24xx: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:31 +01:00
spi-s3c64xx.c	spi: spi-s3c64xx: Fix system resume support	2018-05-17 13:27:08 +09:00
spi-sc18is602.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-sh-hspi.c	spi: sh-hspi: Replace spi_master by spi_controller	2019-02-08 13:04:19 +00:00
spi-sh-msiof.c	spi: sh-msiof: Use devm_platform_ioremap_resource() helper	2019-08-07 14:24:47 +01:00
spi-sh-sci.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-sh.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-sifive.c	spi: sifive: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:41 +01:00
spi-sirf.c	spi: sirf: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:00 +01:00
spi-slave-mt27xx.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-slave-system-control.c	spi: slave: Fix missing break in switch	2018-10-03 16:23:10 +01:00
spi-slave-time.c
spi-sprd-adi.c	spi: sprd: adi: Change hwlock to be optional	2019-07-26 12:24:47 +01:00
spi-sprd.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-st-ssc4.c	spi: st-ssc4: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:10 +01:00
spi-stm32-qspi.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-stm32.c	spi: stm32: return the get_irq error	2019-05-02 10:38:41 +09:00
spi-sun4i.c	spi: sun4i: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:29 +01:00
spi-sun6i.c	spi: sun6i: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:49 +01:00
spi-synquacer.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-tegra20-sflash.c	spi: tegra: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:58 +01:00
spi-tegra20-slink.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201	2019-05-30 11:29:52 -07:00
spi-tegra114.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00
spi-test.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-ti-qspi.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-tle62x0.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-topcliff-pch.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285	2019-06-05 17:36:37 +02:00
spi-txx9.c
spi-uniphier.c	spi: uniphier: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:23:08 +01:00
spi-xcomm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149	2019-05-30 11:25:18 -07:00
spi-xilinx.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-xlp.c	spi: xlp: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:23:28 +01:00
spi-xtensa-xtfpga.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
spi-zynq-qspi.c	spi: zynq-qspi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:24:07 +01:00
spi-zynqmp-gqspi.c	spi: zynqmp: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:23:48 +01:00
spi.c	spi: Use an abbreviated pointer to ctlr->cur_msg in __spi_pump_messages	2019-09-05 18:20:12 +01:00
spidev.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00