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85714108e6
linux/drivers/base
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Peng Fan 85714108e6 drivers: base: dma-mapping: page align the size when unmap_kernel_range 
When dma_common_free_remap, the input parameter 'size' may not
be page aligned. And, met kernel warning when doing iommu dma
for usb on i.MX8 platform:
"
WARNING: CPU: 0 PID: 869 at mm/vmalloc.c:70 vunmap_page_range+0x1cc/0x1d0()
Modules linked in:
CPU: 0 PID: 869 Comm: kworker/u8:2 Not tainted 4.1.12-00444-gc5f9d1d-dirty #147
Hardware name: Freescale i.MX8DV Sabreauto (DT)
Workqueue: ci_otg ci_otg_work
Call trace:
[<ffffffc000089920>] dump_backtrace+0x0/0x124
[<ffffffc000089a54>] show_stack+0x10/0x1c
[<ffffffc0006d1e6c>] dump_stack+0x84/0xc8
[<ffffffc0000b4568>] warn_slowpath_common+0x98/0xd0
[<ffffffc0000b4664>] warn_slowpath_null+0x14/0x20
[<ffffffc000170348>] vunmap_page_range+0x1c8/0x1d0
[<ffffffc000170388>] unmap_kernel_range+0x20/0x88
[<ffffffc000460ad0>] dma_common_free_remap+0x74/0x84
[<ffffffc0000940d8>] __iommu_free_attrs+0x9c/0x178
[<ffffffc0005032bc>] ehci_mem_cleanup+0x140/0x194
[<ffffffc000503548>] ehci_stop+0x8c/0xdc
[<ffffffc0004e8258>] usb_remove_hcd+0xf0/0x1cc
[<ffffffc000516bc0>] host_stop+0x1c/0x58
[<ffffffc000514240>] ci_otg_work+0xdc/0x120
[<ffffffc0000c9c34>] process_one_work+0x134/0x33c
[<ffffffc0000c9f78>] worker_thread+0x13c/0x47c
[<ffffffc0000cf43c>] kthread+0xd8/0xf0
"

For dma_common_pages_remap:
dma_common_pages_remap
   |->get_vm_area_caller
        |->__get_vm_area_node
            |->size = PAGE_ALIGN(size);   Round up to page aligned

So, in dma_common_free_remap, we also need a page aligned size,
pass 'PAGE_ALIGN(size)' to unmap_kernel_range.

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 15:13:56 +02:00
..
power More power management updates for v4.8-rc1 2016-08-05 23:26:16 -04:00
regmap Merge remote-tracking branches 'regmap/topic/bulk', 'regmap/topic/i2c', 'regmap/topic/iopoll', 'regmap/topic/irq' and 'regmap/topic/maintainers' into regmap-next 2016-07-15 13:44:47 +01:00
attribute_container.c
base.h PM / sleep: prohibit devices probing during suspend/hibernation 2015-11-30 14:47:22 +01:00
bus.c driver core: bus: use to_subsys_private and to_device_private_bus 2016-02-09 17:25:27 -08:00
cacheinfo.c cpu/cacheinfo: Fix teardown path 2015-09-17 06:06:54 -07:00
class.c class_find_device: fix reference to argument "match" 2015-09-29 15:23:14 +02:00
component.c Merge 4.5-rc4 into driver-core-next 2016-02-14 14:29:55 -08:00
container.c
core.c driver core: fix race between creating/querying glue dir and its cleanup 2016-08-31 15:13:55 +02:00
cpu.c drivers/base/cpu.c: use __cpu_*_mask directly 2016-01-20 17:09:18 -08:00
dd.c driver core: add test of driver remove calls during probe 2016-08-31 15:13:55 +02:00
devcoredump.c devcoredump: add scatterlist support 2016-04-15 11:20:32 -07:00
devres.c devm: make allocations numa aware by default 2015-10-09 17:00:33 -04:00
devtmpfs.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
dma-coherent.c drivers: dma-coherent: use memset_io for DMA_MEMORY_IO mappings 2016-03-22 15:36:02 -07:00
dma-contiguous.c driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
dma-mapping.c drivers: base: dma-mapping: page align the size when unmap_kernel_range 2016-08-31 15:13:56 +02:00
driver.c
firmware_class.c firmware: support loading into a pre-allocated buffer 2016-08-02 19:35:10 -04:00
firmware.c
hypervisor.c
init.c drivers: of/base: move of_init to driver_init 2015-05-26 19:55:56 -07:00
isa.c isa: Call isa_bus_init before dependent ISA bus drivers register 2016-06-17 20:47:11 -07:00
Kconfig driver core: add test of driver remove calls during probe 2016-08-31 15:13:55 +02:00
Makefile isa: Allow ISA-style drivers on modern systems 2016-06-17 20:21:12 -07:00
map.c
memory.c memory-hotplug: use zone_can_shift() for sysfs valid_zones attribute 2016-07-26 16:19:19 -07:00
module.c base: make module_create_drivers_dir race-free 2016-06-15 19:21:31 -07:00
node.c treewide: replace obsolete _refok by __ref 2016-08-02 17:31:41 -04:00
pinctrl.c drivers/pinctrl: Add the concept of an "init" state 2015-10-27 11:24:23 +01:00
platform-msi.c base: Export platform_msi_domain_[alloc,free]_irqs 2016-01-26 16:33:25 +01:00
platform.c platform driver: fix use-after-free in platform_device_del() 2016-08-31 15:13:56 +02:00
property.c device property: Add function to search for named child of device 2016-06-26 12:39:03 +01:00
soc.c base: soc: siplify ida usage 2015-10-04 19:42:22 +01:00
syscore.c
topology.c topology/sysfs: provide drawer id and siblings attributes 2016-06-13 15:58:27 +02:00
transport_class.c