[PATCH v3 4/4] media: ipu6: make the ipu6_mmu_unmap() as a void function

[Bingbu Cao <bingbu.cao@xxxxxxxxx>]

The DMA unmap API is not supposed to return value. Thus this patch
changes the ipu6_mmu_unmap() as a void function and DMA unmapping
didn't check the return value.

Signed-off-by: Bingbu Cao <bingbu.cao@xxxxxxxxx>
---
 drivers/media/pci/intel/ipu6/ipu6-mmu.c | 15 +++++++--------
 drivers/media/pci/intel/ipu6/ipu6-mmu.h |  4 ++--
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/media/pci/intel/ipu6/ipu6-mmu.c b/drivers/media/pci/intel/ipu6/ipu6-mmu.c
index a8e087188ebb..2d9c6fbd5da2 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-mmu.c
+++ b/drivers/media/pci/intel/ipu6/ipu6-mmu.c
@@ -252,8 +252,8 @@ static u32 *alloc_l2_pt(struct ipu6_mmu_info *mmu_info)
 	return pt;
 }
 
-static size_t l2_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
-		       phys_addr_t dummy, size_t size)
+static void l2_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		     phys_addr_t dummy, size_t size)
 {
 	unsigned int l2_entries;
 	unsigned int l2_idx;
@@ -297,7 +297,6 @@ static size_t l2_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
 
 	WARN_ON_ONCE(size);
 	spin_unlock_irqrestore(&mmu_info->lock, flags);
-	return l2_entries << ISP_PAGE_SHIFT;
 }
 
 static int l2_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
@@ -402,8 +401,8 @@ static int __ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
 	return l2_map(mmu_info, iova_start, paddr, size);
 }
 
-static size_t __ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info,
-			       unsigned long iova, size_t size)
+static void __ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info,
+			     unsigned long iova, size_t size)
 {
 	return l2_unmap(mmu_info, iova, 0, size);
 }
@@ -645,8 +644,8 @@ phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
 	return phy_addr;
 }
 
-size_t ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
-		      size_t size)
+void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		    size_t size)
 {
 	unsigned int min_pagesz;
 
@@ -663,7 +662,7 @@ size_t ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
 	if (!IS_ALIGNED(iova | size, min_pagesz)) {
 		dev_err(NULL, "unaligned: iova 0x%lx size 0x%zx min_pagesz 0x%x\n",
 			iova, size, min_pagesz);
-		return 0;
+		return;
 	}
 
 	return __ipu6_mmu_unmap(mmu_info, iova, size);
diff --git a/drivers/media/pci/intel/ipu6/ipu6-mmu.h b/drivers/media/pci/intel/ipu6/ipu6-mmu.h
index 21cdb0f146eb..8e40b4a66d7d 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-mmu.h
+++ b/drivers/media/pci/intel/ipu6/ipu6-mmu.h
@@ -66,8 +66,8 @@ int ipu6_mmu_hw_init(struct ipu6_mmu *mmu);
 void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu);
 int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
 		 phys_addr_t paddr, size_t size);
-size_t ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
-		      size_t size);
+void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
+		    size_t size);
 phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
 				  dma_addr_t iova);
 #endif
-- 
2.7.4