forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions
linux-uconsole/drivers/base
History
Peng Fan 1ccdc77563 drivers: base: dma-mapping: page align the size when unmap_kernel_range 
commit 85714108e6 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-22 12:26:55 +02:00
..
power PM / sleep: Handle failures in device_suspend_late() consistently 2016-06-07 18:14:37 -07:00
regmap regmap: spmi: Fix regmap_spmi_ext_read in multi-byte case 2016-05-18 17:06:48 -07:00
attribute_container.c attribute_container: fix missing blank lines after declarations 2015-03-25 14:35:09 +01:00
base.h driver core: correct device's shutdown order 2015-08-05 17:07:19 -07:00
bus.c driver-core: add asynchronous probing support for drivers 2015-05-20 00:25:24 -07:00
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 component: fix bug with legacy API 2014-07-04 18:05:05 +01:00
container.c
core.c of: to support binding numa node to specified device in devicetree 2015-10-17 22:11:50 -07:00
cpu.c cpu: Remove bogus __ref annotation of cpu_subsys_online() 2015-08-05 15:18:26 -07:00
dd.c drivers/pinctrl: Add the concept of an "init" state 2015-10-27 11:24:23 +01:00
devcoredump.c devcoredump: provide a one-way disable function 2014-11-26 19:40:12 -08:00
devres.c devm: make allocations numa aware by default 2015-10-09 17:00:33 -04:00
devtmpfs.c VFS: assorted weird filesystems: d_inode() annotations 2015-04-15 15:06:58 -04:00
dma-coherent.c drivers: dma-coherent: add initialization from device tree 2014-10-14 02:18:12 +02:00
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 2016-10-22 12:26:55 +02:00
driver.c driver core: add missing blank line after declaration 2015-03-25 14:36:30 +01:00
firmware.c
firmware_class.c firmware: fix wrong memory deallocation in fw_add_devm_name() 2015-08-05 15:18:26 -07:00
hypervisor.c
init.c drivers: of/base: move of_init to driver_init 2015-05-26 19:55:56 -07:00
isa.c
Kconfig cma: make default CMA area size zero for x86 2014-12-10 17:41:06 -08:00
Makefile drivers/base: Add MSI domain support for non-PCI devices 2015-07-30 00:14:38 +02:00
map.c drivers: base: map: Use kmalloc_array instead of kmalloc 2015-03-25 14:35:08 +01:00
memory.c drivers/base/memory.c: prohibit offlining of memory blocks with missing sections 2015-12-12 10:15:34 -08:00
module.c base: make module_create_drivers_dir race-free 2016-07-27 09:47:32 -07:00
node.c Revert "mm: Check if section present during memory block (un)registering" 2015-10-13 10:57:25 -07:00
pinctrl.c drivers/pinctrl: Add the concept of an "init" state 2015-10-27 11:24:23 +01:00
platform-msi.c irqdomain/msi: Use fwnode instead of of_node 2015-10-13 19:01:25 +02:00
platform.c base/platform: Fix platform drivers with no probe callback 2016-02-17 12:30:55 -08:00
property.c device property: ACPI: Remove unused DMA APIs 2015-11-07 01:29:22 +01:00
soc.c base: soc: siplify ida usage 2015-10-04 19:42:22 +01:00
syscore.c genirq: Simplify wakeup mechanism 2014-09-01 13:48:59 +02:00
topology.c sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask() 2015-05-27 15:22:15 +02:00
transport_class.c