* [PATCH] drm/amdgpu: Add double-sscanf but invert
@ 2021-04-14 15:21 Luben Tuikov
2021-04-14 15:27 ` Luben Tuikov
2021-04-14 15:58 ` Felix Kuehling
0 siblings, 2 replies; 4+ messages in thread
From: Luben Tuikov @ 2021-04-14 15:21 UTC (permalink / raw)
To: amd-gfx; +Cc: Alexander Deucher, Luben Tuikov, John Clements, Hawking Zhang
Add back the double-sscanf so that both decimal
and hexadecimal values could be read in, but this
time invert the scan so that hexadecimal format
with a leading 0x is tried first, and if that
fails, then try decimal format.
Also use a logical-AND instead of nesting double
if-conditional.
See commit "drm/amdgpu: Fix a bug for input with double sscanf"
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: John Clements <john.clements@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 44dfb3613e37..38a691a3b600 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -229,7 +229,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
if (op != -1) {
if (op == 3) {
- if (sscanf(str, "%*s %llx", &address) != 1)
+ if (sscanf(str, "%*s 0x%llx", &address) != 1 &&
+ sscanf(str, "%*s %llu", &address) != 1)
return -EINVAL;
data->op = op;
@@ -253,7 +254,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
data->op = op;
if (op == 2) {
- if (sscanf(str, "%*s %*s %*s %x %llx %llx",
+ if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
+ &sub_block, &address, &value) != 3 &&
+ sscanf(str, "%*s %*s %*s %u %llu %llu",
&sub_block, &address, &value) != 3)
return -EINVAL;
data->head.sub_block_index = sub_block;
--
2.31.0.97.g1424303384
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] drm/amdgpu: Add double-sscanf but invert
2021-04-14 15:21 [PATCH] drm/amdgpu: Add double-sscanf but invert Luben Tuikov
@ 2021-04-14 15:27 ` Luben Tuikov
2021-04-14 15:58 ` Felix Kuehling
1 sibling, 0 replies; 4+ messages in thread
From: Luben Tuikov @ 2021-04-14 15:27 UTC (permalink / raw)
To: amd-gfx; +Cc: Alexander Deucher, Luben Tuikov, John Clements, Hawking Zhang
Add back the double-sscanf so that both decimal
and hexadecimal values could be read in, but this
time invert the scan so that hexadecimal format
with a leading 0x is tried first, and if that
fails, then try decimal format.
Also use a logical-AND instead of nesting double
if-conditional.
See commit "drm/amdgpu: Fix a bug for input with double sscanf"
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 44dfb3613e37..38a691a3b600 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -229,7 +229,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
if (op != -1) {
if (op == 3) {
- if (sscanf(str, "%*s %llx", &address) != 1)
+ if (sscanf(str, "%*s 0x%llx", &address) != 1 &&
+ sscanf(str, "%*s %llu", &address) != 1)
return -EINVAL;
data->op = op;
@@ -253,7 +254,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
data->op = op;
if (op == 2) {
- if (sscanf(str, "%*s %*s %*s %x %llx %llx",
+ if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
+ &sub_block, &address, &value) != 3 &&
+ sscanf(str, "%*s %*s %*s %u %llu %llu",
&sub_block, &address, &value) != 3)
return -EINVAL;
data->head.sub_block_index = sub_block;
--
2.31.0.97.g1424303384
_______________________________________________
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amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/amdgpu: Add double-sscanf but invert
2021-04-14 15:21 [PATCH] drm/amdgpu: Add double-sscanf but invert Luben Tuikov
2021-04-14 15:27 ` Luben Tuikov
@ 2021-04-14 15:58 ` Felix Kuehling
2021-04-14 17:10 ` Luben Tuikov
1 sibling, 1 reply; 4+ messages in thread
From: Felix Kuehling @ 2021-04-14 15:58 UTC (permalink / raw)
To: Luben Tuikov, amd-gfx; +Cc: Alexander Deucher, John Clements, Hawking Zhang
From the sscanf manpage:
i Matches an optionally signed integer; the next pointer
must be
a pointer to int. The integer is read in base 16 if it
begins
with 0x or 0X, in base 8 if it begins with 0, and in
base 10
otherwise. Only characters that correspond to the
base are
used.
So a single sscanf("%*s %i", ...) would to the job. The only problem is
that accepts signed integers, not unsigned. I'm not sure if that's a
problem in this use case.
Regards,
Felix
Am 2021-04-14 um 11:21 a.m. schrieb Luben Tuikov:
> Add back the double-sscanf so that both decimal
> and hexadecimal values could be read in, but this
> time invert the scan so that hexadecimal format
> with a leading 0x is tried first, and if that
> fails, then try decimal format.
>
> Also use a logical-AND instead of nesting double
> if-conditional.
>
> See commit "drm/amdgpu: Fix a bug for input with double sscanf"
>
> Cc: Alexander Deucher <Alexander.Deucher@amd.com>
> Cc: John Clements <john.clements@amd.com>
> Cc: Hawking Zhang <Hawking.Zhang@amd.com>
> Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index 44dfb3613e37..38a691a3b600 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -229,7 +229,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
>
> if (op != -1) {
> if (op == 3) {
> - if (sscanf(str, "%*s %llx", &address) != 1)
> + if (sscanf(str, "%*s 0x%llx", &address) != 1 &&
> + sscanf(str, "%*s %llu", &address) != 1)
> return -EINVAL;
>
> data->op = op;
> @@ -253,7 +254,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
> data->op = op;
>
> if (op == 2) {
> - if (sscanf(str, "%*s %*s %*s %x %llx %llx",
> + if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
> + &sub_block, &address, &value) != 3 &&
> + sscanf(str, "%*s %*s %*s %u %llu %llu",
> &sub_block, &address, &value) != 3)
> return -EINVAL;
> data->head.sub_block_index = sub_block;
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/amdgpu: Add double-sscanf but invert
2021-04-14 15:58 ` Felix Kuehling
@ 2021-04-14 17:10 ` Luben Tuikov
0 siblings, 0 replies; 4+ messages in thread
From: Luben Tuikov @ 2021-04-14 17:10 UTC (permalink / raw)
To: Felix Kuehling, amd-gfx; +Cc: Alexander Deucher, John Clements, Hawking Zhang
Yeah, %i would do, and certainly more elegant, except
for the signed input. Not sure if that's a problem, either,
thus the two sscanf...
Regards,
Luben
On 2021-04-14 11:58 a.m., Felix Kuehling wrote:
> From the sscanf manpage:
>
> i Matches an optionally signed integer; the next pointer
> must be
> a pointer to int. The integer is read in base 16 if it
> begins
> with 0x or 0X, in base 8 if it begins with 0, and in
> base 10
> otherwise. Only characters that correspond to the
> base are
> used.
>
> So a single sscanf("%*s %i", ...) would to the job. The only problem is
> that accepts signed integers, not unsigned. I'm not sure if that's a
> problem in this use case.
>
> Regards,
> Felix
>
> Am 2021-04-14 um 11:21 a.m. schrieb Luben Tuikov:
>> Add back the double-sscanf so that both decimal
>> and hexadecimal values could be read in, but this
>> time invert the scan so that hexadecimal format
>> with a leading 0x is tried first, and if that
>> fails, then try decimal format.
>>
>> Also use a logical-AND instead of nesting double
>> if-conditional.
>>
>> See commit "drm/amdgpu: Fix a bug for input with double sscanf"
>>
>> Cc: Alexander Deucher <Alexander.Deucher@amd.com>
>> Cc: John Clements <john.clements@amd.com>
>> Cc: Hawking Zhang <Hawking.Zhang@amd.com>
>> Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 7 +++++--
>> 1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> index 44dfb3613e37..38a691a3b600 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> @@ -229,7 +229,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
>>
>> if (op != -1) {
>> if (op == 3) {
>> - if (sscanf(str, "%*s %llx", &address) != 1)
>> + if (sscanf(str, "%*s 0x%llx", &address) != 1 &&
>> + sscanf(str, "%*s %llu", &address) != 1)
>> return -EINVAL;
>>
>> data->op = op;
>> @@ -253,7 +254,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
>> data->op = op;
>>
>> if (op == 2) {
>> - if (sscanf(str, "%*s %*s %*s %x %llx %llx",
>> + if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx 0x%llx",
>> + &sub_block, &address, &value) != 3 &&
>> + sscanf(str, "%*s %*s %*s %u %llu %llu",
>> &sub_block, &address, &value) != 3)
>> return -EINVAL;
>> data->head.sub_block_index = sub_block;
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2021-04-14 15:21 [PATCH] drm/amdgpu: Add double-sscanf but invert Luben Tuikov
2021-04-14 15:27 ` Luben Tuikov
2021-04-14 15:58 ` Felix Kuehling
2021-04-14 17:10 ` Luben Tuikov
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