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f127089650
linux/arch/arm
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Gregory CLEMENT f127089650 ARM: 8561/3: dma-mapping: Don't use outer_flush_range when the L2C is coherent 
When a L2 cache controller is used in a system that provides hardware
coherency, the entire outer cache operations are useless, and can be
skipped.  Moreover, on some systems, it is harmful as it causes
deadlocks between the Marvell coherency mechanism, the Marvell PCIe
controller and the Cortex-A9.

In the current kernel implementation, the outer cache flush range
operation is triggered by the dma_alloc function.
This operation can be take place during runtime and in some
circumstances may lead to the PCIe/PL310 deadlock on Armada 375/38x
SoCs.

This patch extends the __dma_clear_buffer() function to receive a
boolean argument related to the coherency of the system. The same
things is done for the calling functions.

Reported-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-07-14 16:25:30 +01:00
..
boot ARM: 8576/1: avoid duplicating "Kernel: arch/arm/boot/*Image is ready" 2016-06-22 19:55:12 +01:00
common Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
configs arch/defconfig: remove CONFIG_RESOURCE_COUNTERS 2016-05-23 17:04:14 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
firmware
include ARM: save and reset the address limit when entering an exception 2016-07-07 16:01:01 +01:00
kernel ARM: save and reset the address limit when entering an exception 2016-07-07 16:01:01 +01:00
kvm - move kvm_stat tool from QEMU repo into tools/kvm/kvm_stat 2016-05-27 13:41:54 -07:00
lib ARM: 8306/1: loop_udelay: remove bogomips value limitation 2016-06-22 19:55:12 +01:00
mach-alpine ARM: alpine: select the Alpine MSI controller driver 2016-02-26 22:57:22 +01:00
mach-artpec
mach-asm9260
mach-aspeed arm: Add Aspeed machine 2016-05-09 17:41:14 +09:30
mach-at91 ARM: at91/soc: reference the whole sama5d2 family 2016-03-29 16:34:31 +02:00
mach-axxia
mach-bcm bus: brcmstb_gisb: Rework dependencies 2016-04-18 14:20:30 -07:00
mach-berlin cpufreq: berlin: Use generic platdev driver 2016-04-25 16:18:23 +02:00
mach-clps711x
mach-cns3xxx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-davinci ARM: DT updates for v4.7 2016-05-18 12:48:46 -07:00
mach-digicolor
mach-dove ARM: dove: Remove CLK_IS_ROOT 2016-04-27 13:55:52 +02:00
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi
mach-imx ARM: SoC platform updates for v4.7 2016-05-18 12:35:46 -07:00
mach-integrator ARM: integrator: move flash registration to device tree 2016-04-04 10:33:16 +02:00
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx This is the bulk of GPIO changes for kernel v4.6: 2016-03-17 21:05:32 -07:00
mach-keystone ARM: provide improved virt_to_idmap() functionality 2016-05-03 11:13:54 +01:00
mach-ks8695 ARM: SoC non-urgent fixes for v4.6 2016-03-20 14:26:57 -07:00
mach-lpc18xx
mach-lpc32xx ARM: lpc32xx: fix NR_IRQS confict 2016-05-24 19:32:46 +00:00
mach-mediatek ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0 ARM: mv78xx0: Remove CLK_IS_ROOT 2016-04-27 12:42:55 +02:00
mach-mvebu cpufreq: mvebu: Move cpufreq code into drivers/cpufreq/ 2016-04-28 15:22:43 +02:00
mach-mxs
mach-netx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-nomadik
mach-nspire ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-omap1 Revert "ARM: OMAP: Catch callers of revision information prior to it being populated" 2016-04-19 08:01:05 -07:00
mach-omap2 MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
mach-orion5x ARM: orion5x: Remove CLK_IS_ROOT 2016-04-27 13:11:42 +02:00
mach-oxnas ARM: Add new mach-oxnas 2016-04-26 09:50:52 +02:00
mach-picoxcell
mach-prima2 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-pxa ARM: SoC fixes for 4.7 2016-05-24 15:50:58 -07:00
mach-qcom
mach-realview ARM: realview: hide unused 'pmu_device' object 2016-04-04 10:58:47 +02:00
mach-rockchip ARM: SoC cleanups and fixes for v4.7 2016-05-18 12:28:29 -07:00
mach-rpc
mach-s3c24xx ARM: Explicitly apply PWM config extracted from pwm_args 2016-05-17 14:45:08 +02:00
mach-s3c64xx ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-s5pv210
mach-sa1100 ARM: sa1100: remove references to the defunct handhelds.org 2016-04-12 12:34:15 -07:00
mach-shmobile ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-socfpga * Altera Arria10 L2 cache and On-Chip RAM ECC handling. (Thor Thayer) 2016-05-16 18:44:39 -07:00
mach-spear
mach-sti ARM: STi: Update platform level menuconfig 'help' 2016-04-07 16:32:14 +02:00
mach-stm32
mach-sunxi cpufreq: sunxi: Use generic platdev driver 2016-04-25 16:18:24 +02:00
mach-tango
mach-tegra ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-u300
mach-uniphier ARM: SoC platform updates for v4.7 2016-05-18 12:35:46 -07:00
mach-ux500 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-versatile ARM: versatile: move flash registration to the device tree 2016-04-04 10:33:16 +02:00
mach-vexpress ARM: vexpress/mps2: introduce MPS2 platform 2016-04-26 12:50:01 +02:00
mach-vt8500
mach-w90x900 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
mach-zx
mach-zynq cpufreq: zynq: Use generic platdev driver 2016-04-25 16:18:24 +02:00
mm ARM: 8561/3: dma-mapping: Don't use outer_flush_range when the L2C is coherent 2016-07-14 16:25:30 +01:00
net
nwfpe
oprofile
plat-iop
plat-omap
plat-orion Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
plat-pxa ARM: pxa: add the number of DMA requestor lines 2016-02-26 22:57:05 +01:00
plat-samsung ARM: EXYNOS: Remove SROM related register settings from mach-exynos 2016-04-18 14:25:28 +02:00
plat-versatile
probes
tools ARM: 8562/1: suppress "include/generated/mach-types.h is up to date." 2016-04-19 19:42:47 +01:00
vdso kbuild: drop FORCE from PHONY targets 2016-04-20 10:27:20 +02:00
vfp exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
xen
Kconfig ARM: 8560/1: errata: Workaround errata A12 825619 / A17 852421 2016-07-14 15:32:31 +01:00
Kconfig-nommu
Kconfig.debug ARM: debug: remove extraneous DEBUG_HI3716_UART option 2016-04-26 13:00:11 +02:00
Makefile ARM: 8576/1: avoid duplicating "Kernel: arch/arm/boot/*Image is ready" 2016-06-22 19:55:12 +01:00