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52ba0746b3
linux/arch/arm
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Ian Campbell 52ba0746b3 xen/arm: correctly handle DMA mapping of compound pages 
Currently xen_dma_map_page concludes that DMA to anything other than
the head page of a compound page must be foreign, since the PFN of the
page is that of the head.

Fix the check to instead consider the whole of a compound page to be
local if the PFN of the head passes the 1:1 check.

We can never see a compound page which is a mixture of foreign and
local sub-pages.

The comment already correctly described the intention, but fixup the
spelling and some grammar.

This fixes the various SSH protocol errors which we have been seeing
on the cubietrucks in our automated test infrastructure.

This has been broken since commit 3567258d28 ("xen/arm: use
hypercall to flush caches in map_page"), which was in v3.19-rc1.

NB arch/arm64/.../xen/page-coherent.h also includes this file.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: xen-devel@lists.xenproject.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: stable@vger.kernel.org # v3.19+
2016-02-08 17:19:27 +00:00
..
boot ARM: SoC fixes for 4.4-rc 2015-12-12 16:43:44 -08:00
common dmaengine updates for 4.4-rc1 2015-11-10 10:05:17 -08:00
configs ARM: at91/defconfig: remove CONFIG_SSB from Atmel defconfigs 2015-11-16 15:53:03 +01:00
crypto
firmware
include xen/arm: correctly handle DMA mapping of compound pages 2016-02-08 17:19:27 +00:00
kernel arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
kvm ARM/arm64: KVM: correct PTE uncachedness check 2015-12-04 16:30:17 +00:00
lib ARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN 2015-12-15 11:51:02 +00:00
mach-alpine
mach-asm9260
mach-at91 ARM: at91: fix pinctrl driver selection 2015-12-04 18:54:53 +01:00
mach-axxia
mach-bcm ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-berlin arm: berlin: add CPU hotplug support 2015-10-15 21:14:28 +02:00
mach-clps711x
mach-cns3xxx
mach-davinci ARM: SoC non-urgent fixes for v4.4 2015-11-10 14:45:05 -08:00
mach-digicolor ARM: digicolor: select pinctrl/gpio driver 2015-10-15 22:27:30 +02:00
mach-dove ARM: dove: Fix legacy get_irqnr_and_base 2015-11-25 14:59:12 +00:00
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: EXYNOS: Fix potential NULL pointer access in exynos_sys_powerdown_conf 2015-11-17 13:32:56 +09:00
mach-footbridge
mach-gemini ARM: gemini: remove unnecessary mdio-gpio includes 2015-10-21 19:50:43 -07:00
mach-highbank
mach-hisi
mach-imx ARM: imx: add platform irq type setting in gpc 2015-11-23 13:12:07 +08:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx ARM: ixp4xx: fix read{b,w,l} return types 2015-12-01 23:45:30 +01:00
mach-keystone
mach-ks8695
mach-lpc18xx
mach-lpc32xx
mach-mediatek ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0
mach-mvebu ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1
mach-omap2 ARM: OMAP2+: enable REGULATOR_FIXED_VOLTAGE 2015-11-30 14:38:05 -08:00
mach-orion5x ARM: orion5x: Fix legacy get_irqnr_and_base 2015-11-25 15:01:00 +00:00
mach-picoxcell
mach-prima2 ARM: Remove __ref on hotplug cpu die path 2015-10-22 09:55:03 -07:00
mach-pxa ARM: pxa: use PWM lookup table for all machines 2015-12-11 00:27:58 +01:00
mach-qcom ARM: Remove __ref on hotplug cpu die path 2015-10-22 09:55:03 -07:00
mach-realview ARM: Remove __ref on hotplug cpu die path 2015-10-22 09:55:03 -07:00
mach-rockchip
mach-rpc
mach-s3c24xx cpufreq: s3c24xx: Do not mark s3c2410_plls_add as __init 2015-11-27 10:10:32 +09:00
mach-s3c64xx ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-s5pv210
mach-sa1100
mach-shmobile ARM: shmobile: r8a7793: proper constness with __initconst 2015-11-22 17:13:13 -08:00
mach-socfpga
mach-spear ARM: SoC cleanups for v4.4 2015-11-10 14:48:36 -08:00
mach-sti
mach-stm32
mach-sunxi ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-tegra ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
mach-u300 spi: Updates for v4.4 2015-11-05 13:15:12 -08:00
mach-uniphier ARM: uniphier: rework SMP operations to use trampoline code 2015-10-27 09:20:53 +09:00
mach-ux500 ARM: SoC cleanups for v4.4 2015-11-10 14:48:36 -08:00
mach-versatile
mach-vexpress ARM: Remove __ref on hotplug cpu die path 2015-10-22 09:55:03 -07:00
mach-vt8500
mach-w90x900
mach-zx ARM: zx: only build power domain code when CONFIG_PM=y 2015-11-19 16:16:45 +01:00
mach-zynq
mm Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2015-12-17 11:20:13 -08:00
net bpf, arm: start flushing icache range from header 2015-11-16 14:40:49 -05:00
nwfpe
oprofile
plat-iop
plat-omap
plat-orion mvebu fixes for 4.3 (part 1) 2015-10-14 17:10:55 +02:00
plat-pxa
plat-samsung
plat-versatile
probes
tools
vdso ARM: 8449/1: fix bug in vdsomunge swab32 macro 2015-10-29 15:20:15 +00:00
vfp
xen xen/arm: set the system time in Xen via the XENPF_settime64 hypercall 2015-12-21 14:40:58 +00:00
Kconfig arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
Kconfig-nommu
Kconfig.debug ARM: SoC platform updates for v4.4 2015-11-10 14:56:23 -08:00
Makefile