From c4cb773c702be5519442c8375a6476d08fe2cb46 Mon Sep 17 00:00:00 2001
From: Hanjun Guo <guohanjun@huawei.com>
Date: Fri, 13 Nov 2020 11:11:14 +0800
Subject: drm/amdkfd: Put ACPI table after using it
Git-commit: c4cb773c702be5519442c8375a6476d08fe2cb46
Patch-mainline: v5.11-rc1
References: bsc#1152489
The acpi_get_table() should be coupled with acpi_put_table() if
the mapped table is not used at runtime to release the table
mapping which can prevent the memory leak.
In kfd_create_crat_image_acpi(), crat_table is copied to pcrat_image,
and in kfd_create_vcrat_image_cpu(), the acpi_table is only used to
get the OEM information, so those two table mappings need to be released
after using it.
Fixes: 174de876d6d0 ("drm/amdkfd: Group up CRAT related functions")
Fixes: 520b8fb755cc ("drm/amdkfd: Add topology support for CPUs")
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -748,6 +748,7 @@ int kfd_create_crat_image_acpi(void **cr
struct acpi_table_header *crat_table;
acpi_status status;
void *pcrat_image;
+ int rc = 0;
if (!crat_image)
return -EINVAL;
@@ -772,13 +773,16 @@ int kfd_create_crat_image_acpi(void **cr
}
pcrat_image = kmemdup(crat_table, crat_table->length, GFP_KERNEL);
- if (!pcrat_image)
- return -ENOMEM;
+ if (!pcrat_image) {
+ rc = -ENOMEM;
+ goto out;
+ }
*crat_image = pcrat_image;
*size = crat_table->length;
-
- return 0;
+out:
+ acpi_put_table(crat_table);
+ return rc;
}
/* Memory required to create Virtual CRAT.
@@ -962,6 +966,7 @@ static int kfd_create_vcrat_image_cpu(vo
CRAT_OEMID_LENGTH);
memcpy(crat_table->oem_table_id, acpi_table->oem_table_id,
CRAT_OEMTABLEID_LENGTH);
+ acpi_put_table(acpi_table);
}
crat_table->total_entries = 0;
crat_table->num_domains = 0;