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video/rockchip: rga2: do some check for user memory

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Change-Id: Idbf3d918f127ad53e2d05e56fadcf0b7a4fea2b4
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
This commit is contained in:
Mark Yao
2017-04-28 15:59:23 +08:00
committed by Huang, Tao
parent c06e1d104b
commit 6809316454
1 changed files with 7 additions and 3 deletions
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10
drivers/video/rockchip/rga2/rga2_mmu_info.c
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@@ -339,17 +339,20 @@ static int rga2_MapUserMemory(struct page **pages, uint32_t *pageTable,
break;
}
pgd = pgd_offset(current->mm, (Memory + i) << PAGE_SHIFT);
if (pgd_val(*pgd) == 0) {
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) {
pr_err("RGA2 failed to get pgd\n");
status = RGA2_OUT_OF_RESOURCES;
break;
}
pud = pud_offset(pgd, (Memory + i) << PAGE_SHIFT);
if (!pud) {
if (pud_none(*pud) || unlikely(pud_bad(*pud))) {
pr_err("RGA2 failed to get pud\n");
status = RGA2_OUT_OF_RESOURCES;
break;
}
pmd = pmd_offset(pud, (Memory + i) << PAGE_SHIFT);
if (!pmd) {
if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd))) {
pr_err("RGA2 failed to get pmd\n");
status = RGA2_OUT_OF_RESOURCES;
break;
}
@@ -357,6 +360,7 @@ static int rga2_MapUserMemory(struct page **pages, uint32_t *pageTable,
(Memory + i) << PAGE_SHIFT,
&ptl);
if (!pte) {
pr_err("RGA2 failed to get pte\n");
pte_unmap_unlock(pte, ptl);
status = RGA2_OUT_OF_RESOURCES;
break;