Commit 80a4e3ad8dab for kernel
commit 80a4e3ad8daba66915a9bdf0fcae5831cc8dbd5f
Author: Vasant Hegde <vasant.hegde@amd.com>
Date: Fri Sep 11 08:33:52 2026 +0000
iommu/amd: Remove redundant checks from interrupt handler path
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>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 67a86b9e1eca..56262f6b1f70 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);