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media: staging: imgu: do not hold spinlock during freeing mmu page table

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[ Upstream commit e1ebe9f9c8 ]

ImgU need set the mmu page table in memory as uncached, and set back
to write-back when free the page table by set_memory_wb(),
set_memory_wb() can not do flushing without interrupt, so the spinlock
should not be hold during ImgU page alloc and free, the interrupt
should be enabled during memory cache flush.

This patch release spinlock before freeing pages table.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bingbu Cao
2020-03-24 05:16:48 +01:00
committed by Greg Kroah-Hartman
parent 22710f6c35
commit ff41c7b3c7
1 changed files with 6 additions and 4 deletions
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10
drivers/staging/media/ipu3/ipu3-mmu.c
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@@ -174,8 +174,10 @@ static u32 *imgu_mmu_get_l2pt(struct imgu_mmu *mmu, u32 l1pt_idx)
spin_lock_irqsave(&mmu->lock, flags);
l2pt = mmu->l2pts[l1pt_idx];
if (l2pt)
goto done;
if (l2pt) {
spin_unlock_irqrestore(&mmu->lock, flags);
return l2pt;
}
spin_unlock_irqrestore(&mmu->lock, flags);
@@ -190,8 +192,9 @@ static u32 *imgu_mmu_get_l2pt(struct imgu_mmu *mmu, u32 l1pt_idx)
l2pt = mmu->l2pts[l1pt_idx];
if (l2pt) {
spin_unlock_irqrestore(&mmu->lock, flags);
imgu_mmu_free_page_table(new_l2pt);
goto done;
return l2pt;
}
l2pt = new_l2pt;
@@ -200,7 +203,6 @@ static u32 *imgu_mmu_get_l2pt(struct imgu_mmu *mmu, u32 l1pt_idx)
pteval = IPU3_ADDR2PTE(virt_to_phys(new_l2pt));
mmu->l1pt[l1pt_idx] = pteval;
done:
spin_unlock_irqrestore(&mmu->lock, flags);
return l2pt;
}