[PATCH 3/4] iommu/amd: Remove redundant checks from interrupt handler path

[Vasant Hegde <vasant.hegde@amd.com>]

PPR and GAlog interrupt is enabled only if buffer is allocated.
(See amd_iommu_enable_ppr_log() and iommu_ga_log_enable()).

The duplicate check in interrupt hanlder path is unnecessary
and can be removed.

No functional changes.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
---
 drivers/iommu/amd/iommu.c | 3 ---
 drivers/iommu/amd/ppr.c   | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 5bb7d8cb506e..ed38f2328618 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1076,9 +1076,6 @@ static void iommu_poll_ga_log(struct amd_iommu *iommu)
 {
 	u32 head, tail;
 
-	if (iommu->ga_log == NULL)
-		return;
-
 	head = readl(iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
 	tail = readl(iommu->mmio_base + MMIO_GA_TAIL_OFFSET);
 
diff --git a/drivers/iommu/amd/ppr.c b/drivers/iommu/amd/ppr.c
index 76296079bb8b..2039a9dd71ac 100644
--- a/drivers/iommu/amd/ppr.c
+++ b/drivers/iommu/amd/ppr.c
@@ -165,9 +165,6 @@ void amd_iommu_poll_ppr_log(struct amd_iommu *iommu)
 {
 	u32 head, tail;
 
-	if (iommu->ppr_log == NULL)
-		return;
-
 	head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
 	tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET);
 
-- 
2.31.1