If the ignore_crat is set to non-zero value, it's no point getting
the CRAT table, so just move the ignore_crat check before we get the
CRAT table.
Signed-off-by: Hanjun Guo <[email protected]>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index 6a250f8..ed77b109 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -764,6 +764,11 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
*crat_image = NULL;
+ if (ignore_crat) {
+ pr_info("CRAT table disabled by module option\n");
+ return -ENODATA;
+ }
+
/* Fetch the CRAT table from ACPI */
status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table);
if (status == AE_NOT_FOUND) {
@@ -776,11 +781,6 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
return -EINVAL;
}
- if (ignore_crat) {
- pr_info("CRAT table disabled by module option\n");
- return -ENODATA;
- }
-
pcrat_image = kmemdup(crat_table, crat_table->length, GFP_KERNEL);
if (!pcrat_image)
return -ENOMEM;
--
1.7.12.4
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 <[email protected]>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index ed77b109..c3f3ffb6 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -758,6 +758,7 @@ 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;
@@ -782,13 +783,16 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
}
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.
@@ -972,6 +976,7 @@ 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;
--
1.7.12.4
Am 2020-08-26 um 4:29 a.m. schrieb Hanjun Guo:
> If the ignore_crat is set to non-zero value, it's no point getting
> the CRAT table, so just move the ignore_crat check before we get the
> CRAT table.
>
> Signed-off-by: Hanjun Guo <[email protected]>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> index 6a250f8..ed77b109 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> @@ -764,6 +764,11 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
>
> *crat_image = NULL;
>
> + if (ignore_crat) {
A conflicting change in this area was just submitted on Monday to
amd-staging-drm-next. You'll need to rebase your patch. It should be
straight-forward. ignore_crat was replaced with a function call
kfd_ignore_crat().
Other than that, your patch series looks good to me. If I don't see an
update from you in a day or two, I'll fix it up myself and add my R-b.
Thanks,
Felix
> + pr_info("CRAT table disabled by module option\n");
> + return -ENODATA;
> + }
> +
> /* Fetch the CRAT table from ACPI */
> status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table);
> if (status == AE_NOT_FOUND) {
> @@ -776,11 +781,6 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
> return -EINVAL;
> }
>
> - if (ignore_crat) {
> - pr_info("CRAT table disabled by module option\n");
> - return -ENODATA;
> - }
> -
> pcrat_image = kmemdup(crat_table, crat_table->length, GFP_KERNEL);
> if (!pcrat_image)
> return -ENOMEM;
On 2020/8/27 12:28, Felix Kuehling wrote:
>
> Am 2020-08-26 um 4:29 a.m. schrieb Hanjun Guo:
>> If the ignore_crat is set to non-zero value, it's no point getting
>> the CRAT table, so just move the ignore_crat check before we get the
>> CRAT table.
>>
>> Signed-off-by: Hanjun Guo <[email protected]>
>> ---
>> drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 10 +++++-----
>> 1 file changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
>> index 6a250f8..ed77b109 100644
>> --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
>> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
>> @@ -764,6 +764,11 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size)
>>
>> *crat_image = NULL;
>>
>> + if (ignore_crat) {
>
> A conflicting change in this area was just submitted on Monday to
> amd-staging-drm-next. You'll need to rebase your patch. It should be
> straight-forward. ignore_crat was replaced with a function call
> kfd_ignore_crat().
>
> Other than that, your patch series looks good to me. If I don't see an
> update from you in a day or two, I'll fix it up myself and add my R-b.
Please fix it up by yourself, thanks a lot for the help!
Regards
Hanjun