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ion: rockchip: fix snapshot alignment fault on armv8

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Fix this bug:
Unhandled fault: alignment fault (0x96000061) at 0xffffff8000006016
Internal error: : 96000061 [#1] PREEMPT SMP
Modules linked in: dc_fbdev(O) pvrsrvkm(O)
CPU: 0 PID: 125 Comm: Binder_2 Tainted: G           O 3.10.0 #36
task: ffffffc0530f7380 ti: ffffffc0531c0000 task.ti: ffffffc0531c0000
PC is at memcpy+0x2c/0x60
LR is at vsnprintf+0x100/0x598
[<ffffffc0002e093c>] memcpy+0x2c/0x60
[<ffffffc00018b3bc>] seq_vprintf+0x48/0x84
[<ffffffc00018b44c>] seq_printf+0x54/0x60
[<ffffffc00063a238>] ion_alloc+0x4fc/0x778
[<ffffffc00063a98c>] ion_ioctl+0x164/0x360
[<ffffffc00017bfa8>] vfs_ioctl+0x20/0x3c
[<ffffffc00017c8ac>] do_vfs_ioctl+0x474/0x540
[<ffffffc00017c9d4>] SyS_ioctl+0x5c/0x88

pgprot_noncached will map buffer as MT_DEVICE, but
All store accesses to Device memory use the asynchronous abort mechanism on
Cortex-A53.

Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
This commit is contained in:
Huang, Tao 2014-12-23 21:36:07 +08:00
parent e93588288e
commit 22eb70f063
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/android/ion/rockchip/rockchip_ion_snapshot.c
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@ -112,7 +112,7 @@ static void * __init last_ion_vmap(phys_addr_t start, unsigned int page_count)
pages[i] = pfn_to_page(addr >> PAGE_SHIFT);
}
pages[page_count] = pfn_to_page(start >> PAGE_SHIFT);
return vmap(pages, page_count + 1, VM_MAP, pgprot_noncached(PAGE_KERNEL));
return vmap(pages, page_count + 1, VM_MAP, pgprot_writecombine(PAGE_KERNEL));
}
static int __init rockchip_ion_snapshot_init(void)