AcoSail/kernel_optimize_test
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29b06d12ba
kernel_optimize_test/drivers/i2c/busses
History
Paul Kocialkowski f275a46594 i2c: bcm2835: Clear current buffer pointers and counts after a transfer 
The driver's interrupt handler checks whether a message is currently
being handled with the curr_msg pointer. When it is NULL, the interrupt
is considered to be unexpected. Similarly, the i2c_start_transfer
routine checks for the remaining number of messages to handle in
num_msgs.

However, these values are never cleared and always keep the message and
number relevant to the latest transfer (which might be done already and
the underlying message memory might have been freed).

When an unexpected interrupt hits with the DONE bit set, the isr will
then try to access the flags field of the curr_msg structure, leading
to a fatal page fault.

The msg_buf and msg_buf_remaining fields are also never cleared at the
end of the transfer, which can lead to similar pitfalls.

Fix these issues by introducing a cleanup function and always calling
it after a transfer is finished.

Fixes: e247454103 ("i2c: bcm2835: Fix hang for writing messages larger than 16 bytes")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-02-15 09:45:05 +01:00
..
i2c-acorn.c
i2c-ali15x3.c
i2c-ali1535.c
i2c-ali1563.c
i2c-altera.c
i2c-amd756-s4882.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
i2c-amd756.c
i2c-amd8111.c i2c: amd8111: Mark expected switch fall-through 2018-08-08 22:28:46 +02:00
i2c-aspeed.c i2c: aspeed: fix invalid clock parameters for very large divisors 2018-09-24 23:50:42 +02:00
i2c-at91.c i2c: at91: Read all available bytes at once 2018-04-30 10:39:28 +02:00
i2c-au1550.c
i2c-axxia.c i2c: axxia: support sequence command mode 2018-12-17 23:28:50 +01:00
i2c-bcm-iproc.c
i2c-bcm-kona.c
i2c-bcm2835.c i2c: bcm2835: Clear current buffer pointers and counts after a transfer 2019-02-15 09:45:05 +01:00
i2c-brcmstb.c i2c: remove i2c_lock_adapter and use i2c_lock_bus directly 2018-07-13 00:09:37 +02:00
i2c-cadence.c i2c: cadence: Fix the hold bit setting 2019-02-15 09:42:17 +01:00
i2c-cbus-gpio.c
i2c-cht-wc.c i2c-cht-wc: Fix bq24190 supplier 2018-07-02 17:38:07 +02:00
i2c-cpm.c
i2c-cros-ec-tunnel.c i2c: i2c-cros-ec-tunnel: Switch to SPDX identifier. 2018-12-17 23:08:41 +01:00
i2c-davinci.c Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-08-21 17:40:46 -07:00
i2c-designware-baytrail.c More ACPI updates for 4.20-rc1 2018-10-30 09:15:31 -07:00
i2c-designware-common.c More ACPI updates for 4.20-rc1 2018-10-30 09:15:31 -07:00
i2c-designware-core.h More ACPI updates for 4.20-rc1 2018-10-30 09:15:31 -07:00
i2c-designware-master.c This is the 4.19-rc7 release 2018-10-11 23:07:30 +02:00
i2c-designware-pcidrv.c i2c: designware: Add SPDX license tag 2018-08-20 10:45:45 +02:00
i2c-designware-platdrv.c More ACPI updates for 4.20-rc1 2018-10-30 09:15:31 -07:00
i2c-designware-slave.c i2c: designware: Add SPDX license tag 2018-08-20 10:45:45 +02:00
i2c-digicolor.c
i2c-diolan-u2c.c i2c: busses: make use of i2c_8bit_addr_from_msg 2018-05-29 20:30:49 +02:00
i2c-dln2.c
i2c-efm32.c i2c: busses: make use of i2c_8bit_addr_from_msg 2018-05-29 20:30:49 +02:00
i2c-eg20t.c i2c: busses: make use of i2c_8bit_addr_from_msg 2018-05-29 20:30:49 +02:00
i2c-elektor.c
i2c-emev2.c i2c: use SPDX identifier for Renesas drivers 2018-08-24 14:49:36 +02:00
i2c-exynos5.c i2c: exynos5: Describe the hardware variant for readability 2018-07-21 00:15:22 +02:00
i2c-fsi.c i2c: fsi: Add bus recovery 2018-07-21 00:07:09 +02:00
i2c-gpio.c Merge branch 'i2c/precise-locking-names_immutable' into i2c/for-4.19 2018-07-13 00:12:53 +02:00
i2c-highlander.c i2c: use SPDX identifier for Renesas drivers 2018-08-24 14:49:36 +02:00
i2c-hix5hd2.c i2c: busses: make use of i2c_8bit_addr_from_msg 2018-05-29 20:30:49 +02:00
i2c-hydra.c
i2c-i801.c i2c: i801: fix DNV's SMBCTRL register offset 2018-09-04 18:04:55 +02:00
i2c-ibm_iic.c i2c: Remove caller signal_pending branch predictions 2018-11-27 12:59:16 +01:00
i2c-ibm_iic.h
i2c-img-scb.c
i2c-imx-lpi2c.c i2c: imx-lpi2c: Remove mx8dv compatible entry 2018-09-02 23:50:43 +02:00
i2c-imx.c i2c: imx: don't print error message on probe defer 2018-11-27 12:55:45 +01:00
i2c-iop3xx.c
i2c-iop3xx.h
i2c-isch.c i2c: i2c-isch: fix spelling mistake "unitialized" -> "uninitialized" 2018-09-25 00:14:04 +02:00
i2c-ismt.c i2c: ismt: Add support for Intel Cedar Fork 2019-01-03 20:02:32 +01:00
i2c-jz4780.c
i2c-kempld.c i2c: busses: make use of i2c_8bit_addr_from_msg 2018-05-29 20:30:49 +02:00
i2c-lpc2k.c
i2c-meson.c
i2c-mlxcpld.c i2c: mlxcpld: Allow configurable adapter id for mlxcpld 2018-04-30 10:39:29 +02:00
i2c-mpc.c
i2c-mt65xx.c i2c: mediatek: Use DMA safe buffers for i2c transactions 2018-09-06 20:33:15 +02:00
i2c-mv64xxx.c
i2c-mxs.c i2c: mxs: use core to detect 'no zero length' quirk 2018-08-04 23:25:06 +02:00
i2c-nforce2-s4985.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
i2c-nforce2.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
i2c-nomadik.c i2c: busses: remove superfluous ignoring of children for RPM 2018-05-08 23:19:02 +02:00
i2c-nvidia-gpu.c i2c: nvidia-gpu: mark resume function as __maybe_unused 2018-12-11 21:39:43 +01:00
i2c-ocores.c i2c: ocores: update my email address 2018-08-24 14:46:43 +02:00
i2c-octeon-core.c
i2c-octeon-core.h
i2c-octeon-platdrv.c
i2c-omap.c i2c: omap: Use noirq system sleep pm ops to idle device for suspend 2019-02-05 13:13:20 +01:00
i2c-opal.c i2c: opal: don't check number of messages in the driver 2018-05-24 22:06:17 +02:00
i2c-owl.c i2c: Add Actions Semiconductor Owl family S700 I2C support 2019-01-03 20:36:18 +01:00
i2c-parport-light.c
i2c-parport.c
i2c-parport.h
i2c-pasemi.c i2c: pasemi: remove hardcoded bus numbers on smbus 2018-08-20 11:01:13 +02:00
i2c-pca-isa.c
i2c-pca-platform.c i2c: pca-platform: move header to platform_data 2018-05-17 16:27:58 +02:00
i2c-piix4.c
i2c-pmcmsp.c i2c: pmcmsp: use core to detect 'no zero length' quirk 2018-08-04 23:25:06 +02:00
i2c-pnx.c i2c: pnx: move header into the driver 2018-05-17 16:27:59 +02:00
i2c-powermac.c i2c: powermac: Use of_node_name_eq for node name comparisons 2018-12-11 21:16:28 +01:00
i2c-puv3.c
i2c-pxa-pci.c
i2c-pxa.c
i2c-qcom-geni.c i2c: qcom-geni: Fix runtime PM mismatch with child devices 2018-11-09 17:25:48 +01:00
i2c-qup.c i2c: qup: use core to detect 'no zero length' quirk 2018-10-05 18:05:08 +02:00
i2c-rcar.c i2c: rcar: check bus state before reinitializing 2018-11-27 14:00:36 +01:00
i2c-riic.c i2c: use SPDX identifier for Renesas drivers 2018-08-24 14:49:36 +02:00
i2c-rk3x.c i2c: rk3x: Don't print visible virtual mapping MMIO address 2018-05-24 22:09:05 +02:00
i2c-robotfuzz-osif.c i2c: robotfuzz-osif: drop pointless test 2018-05-24 22:13:04 +02:00
i2c-s3c2410.c i2c: remove i2c_lock_adapter and use i2c_lock_bus directly 2018-07-13 00:09:37 +02:00
i2c-scmi.c i2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node 2018-12-06 23:14:59 +01:00
i2c-sh_mobile.c i2c: sh_mobile: Add support for r8a774c0 (RZ/G2E) 2018-12-17 23:20:09 +01:00
i2c-sh7760.c
i2c-sibyte.c
i2c-simtec.c
i2c-sirf.c
i2c-sis96x.c
i2c-sis630.c
i2c-sis5595.c
i2c-sprd.c i2c: remove i2c_lock_adapter and use i2c_lock_bus directly 2018-07-13 00:09:37 +02:00
i2c-st.c
i2c-stm32.c i2c: i2c-stm32: Add generic DMA API 2018-04-30 10:39:27 +02:00
i2c-stm32.h i2c: i2c-stm32: Add generic DMA API 2018-04-30 10:39:27 +02:00
i2c-stm32f4.c
i2c-stm32f7.c i2c: i2c-stm32f7: add PM Runtime support 2018-12-01 00:14:45 +01:00
i2c-stu300.c i2c: stu300: use core to detect 'no zero length' quirk 2018-08-04 23:25:07 +02:00
i2c-sun6i-p2wi.c
i2c-synquacer.c i2c: synquacer: fix fall-through annotation 2018-09-25 00:06:02 +02:00
i2c-taos-evm.c
i2c-tegra-bpmp.c
i2c-tegra.c i2c: tegra: Fix Maximum transfer size 2019-01-11 00:15:04 +01:00
i2c-thunderx-pcidrv.c
i2c-tiny-usb.c
i2c-uniphier-f.c i2c: uniphier-f: fix violation of tLOW requirement for Fast-mode 2018-12-06 23:14:59 +01:00
i2c-uniphier.c i2c: uniphier: fix violation of tLOW requirement for Fast-mode 2018-12-06 23:14:59 +01:00
i2c-versatile.c
i2c-via.c
i2c-viapro.c
i2c-viperboard.c i2c: viperboard: return message count on master_xfer success 2018-05-15 09:31:26 +02:00
i2c-wmt.c
i2c-xgene-slimpro.c
i2c-xiic.c i2c: xiic: Make the start and the byte count write atomic 2018-09-06 20:49:09 +02:00
i2c-xlp9xx.c i2c: xlp9xx: Fix case where SSIF read transaction completes early 2018-08-09 17:41:13 +02:00
i2c-xlr.c i2c: xlr: use core to detect 'no zero length' quirk 2018-08-04 23:25:08 +02:00
i2c-zx2967.c i2c: zx2967: use core to detect 'no zero length' quirk 2018-10-05 18:05:37 +02:00
Kconfig i2c: add i2c bus driver for NVIDIA GPU 2018-11-09 17:46:43 +01:00
Makefile i2c: add i2c bus driver for NVIDIA GPU 2018-11-09 17:46:43 +01:00
scx200_acb.c