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drm/amdkfd: Put ACPI table after using it 

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: 174de876d6 ("drm/amdkfd: Group up CRAT related functions")
Fixes: 520b8fb755 ("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>
This commit is contained in:
Hanjun Guo 2020-11-13 11:11:14 +08:00 committed by Alex Deucher
parent 1cb027950a
commit c4cb773c70
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/amd/amdkfd/kfd_crat.c
View File

@ -780,6 +780,7 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
struct acpi_table_header *crat_table;
acpi_status status;
void *pcrat_image;
int rc = 0;
if (!crat_image)
return -EINVAL;
@ -804,14 +805,17 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
}
pcrat_image = kvmalloc(crat_table->length, GFP_KERNEL);
if (!pcrat_image)
return -ENOMEM;
if (!pcrat_image) {
rc = -ENOMEM;
goto out;
}
memcpy(pcrat_image, crat_table, crat_table->length);
*crat_image = pcrat_image;
*size = crat_table->length;
return 0;
out:
acpi_put_table(crat_table);
return rc;
}
/* Memory required to create Virtual CRAT.
@ -994,6 +998,7 @@ static int kfd_create_vcrat_image_cpu(void *pcrat_image, size_t *size)
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;