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

[Bingbu Cao <bingbu.cao@xxxxxxxxx>]

The spinlock should not be hold during ImgU page alloc and free, the
irq should be enabled during memory cache flush - cpa_flush(). The
spinlock should be released before freeing pages table.

Signed-off-by: Bingbu Cao <bingbu.cao@xxxxxxxxx>
---
 drivers/staging/media/ipu3/ipu3-mmu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/media/ipu3/ipu3-mmu.c b/drivers/staging/media/ipu3/ipu3-mmu.c
index 5f3ff964f3e7..cb9bf5fb29a5 100644
--- a/drivers/staging/media/ipu3/ipu3-mmu.c
+++ b/drivers/staging/media/ipu3/ipu3-mmu.c
@@ -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;
 }
-- 
2.7.4