[PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Jon Hunter]

On multi-socket platforms each socket has its own BPMP which exposes the
same clock names. Fix this by using the NUMA ID as a prefix for the
clock names on multi-socket platforms.

Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
future proof against anyone changing the size of the 'name' array.

Co-developed-by: Timo Alho <talho@nvidia.com>
Signed-off-by: Timo Alho <talho@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
Changes since V1:
- Use NUMA ID as a prefix and not a suffix for the clock name.

 drivers/clk/tegra/clk-bpmp.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c
index f6d2b934228b..067a8555c4e7 100644
--- a/drivers/clk/tegra/clk-bpmp.c
+++ b/drivers/clk/tegra/clk-bpmp.c
@@ -367,7 +367,15 @@ static int tegra_bpmp_clk_get_info(struct tegra_bpmp *bpmp, unsigned int id,
 	if (err < 0)
 		return err;
 
-	strscpy(info->name, response.name, MRQ_CLK_NAME_MAXLEN);
+	if (dev_to_node(bpmp->dev) == NUMA_NO_NODE) {
+		strscpy(info->name, response.name, sizeof(info->name));
+	} else {
+		err = snprintf(info->name, sizeof(info->name), "%d-%s",
+			       dev_to_node(bpmp->dev), response.name);
+		if (WARN_ON(err >= sizeof(info->name)))
+			return -E2BIG;
+	}
+
 	info->num_parents = response.num_parents;
 
 	for (i = 0; i < info->num_parents; i++)
-- 
2.43.0

Re: [PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Thierry Reding]

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On Tue, Jun 02, 2026 at 09:43:34AM +0100, Jon Hunter wrote:
> On multi-socket platforms each socket has its own BPMP which exposes the
> same clock names. Fix this by using the NUMA ID as a prefix for the
> clock names on multi-socket platforms.
> 
> Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
> future proof against anyone changing the size of the 'name' array.
> 
> Co-developed-by: Timo Alho <talho@nvidia.com>
> Signed-off-by: Timo Alho <talho@nvidia.com>
> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
> ---
> Changes since V1:
> - Use NUMA ID as a prefix and not a suffix for the clock name.
> 
>  drivers/clk/tegra/clk-bpmp.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)

Reviewed-by: Thierry Reding <treding@nvidia.com>

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Re: [PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Brian Masney]

On Tue, Jun 02, 2026 at 09:43:34AM +0100, Jon Hunter wrote:
> On multi-socket platforms each socket has its own BPMP which exposes the
> same clock names. Fix this by using the NUMA ID as a prefix for the
> clock names on multi-socket platforms.
> 
> Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
> future proof against anyone changing the size of the 'name' array.
> 
> Co-developed-by: Timo Alho <talho@nvidia.com>
> Signed-off-by: Timo Alho <talho@nvidia.com>
> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>

Reviewed-by: Brian Masney <bmasney@redhat.com>

Re: [PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Jon Hunter]

Hi Mike, Stephen,

On 02/06/2026 13:01, Thierry Reding wrote:
> On Tue, Jun 02, 2026 at 09:43:34AM +0100, Jon Hunter wrote:
>> On multi-socket platforms each socket has its own BPMP which exposes the
>> same clock names. Fix this by using the NUMA ID as a prefix for the
>> clock names on multi-socket platforms.
>>
>> Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
>> future proof against anyone changing the size of the 'name' array.
>>
>> Co-developed-by: Timo Alho <talho@nvidia.com>
>> Signed-off-by: Timo Alho <talho@nvidia.com>
>> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
>> ---
>> Changes since V1:
>> - Use NUMA ID as a prefix and not a suffix for the clock name.
>>
>>   drivers/clk/tegra/clk-bpmp.c | 10 +++++++++-
>>   1 file changed, 9 insertions(+), 1 deletion(-)
> 
> Reviewed-by: Thierry Reding <treding@nvidia.com>


Please let me know if you have any comments on this or if this is OK to 
be picked up now?

Thanks
Jon

-- 
nvpublic

Re: [PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Brian Masney]

Hi Jon,

On Tue, Jul 07, 2026 at 07:28:38AM +0100, Jon Hunter wrote:
> On 02/06/2026 13:01, Thierry Reding wrote:
> > On Tue, Jun 02, 2026 at 09:43:34AM +0100, Jon Hunter wrote:
> > > On multi-socket platforms each socket has its own BPMP which exposes the
> > > same clock names. Fix this by using the NUMA ID as a prefix for the
> > > clock names on multi-socket platforms.
> > > 
> > > Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
> > > future proof against anyone changing the size of the 'name' array.
> > > 
> > > Co-developed-by: Timo Alho <talho@nvidia.com>
> > > Signed-off-by: Timo Alho <talho@nvidia.com>
> > > Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
> > > ---
> > > Changes since V1:
> > > - Use NUMA ID as a prefix and not a suffix for the clock name.
> > > 
> > >   drivers/clk/tegra/clk-bpmp.c | 10 +++++++++-
> > >   1 file changed, 9 insertions(+), 1 deletion(-)
> > 
> > Reviewed-by: Thierry Reding <treding@nvidia.com>
> 
> 
> Please let me know if you have any comments on this or if this is OK to be
> picked up now?

I made a pull for Stephen last week for various clk patches that were
missed during the last merge window. I included your patch.

https://lore.kernel.org/linux-clk/akLzCVzbMbUsgDda@redhat.com/

I'm going to collect up stuff at rc6 this development cycle and assemble
another pull then.

Brian

Re: [PATCH V2] clk: tegra: Support unique names for multi-socket platforms

[Jon Hunter]

Hi Brian,

On 07/07/2026 16:01, Brian Masney wrote:
> Hi Jon,
> 
> On Tue, Jul 07, 2026 at 07:28:38AM +0100, Jon Hunter wrote:
>> On 02/06/2026 13:01, Thierry Reding wrote:
>>> On Tue, Jun 02, 2026 at 09:43:34AM +0100, Jon Hunter wrote:
>>>> On multi-socket platforms each socket has its own BPMP which exposes the
>>>> same clock names. Fix this by using the NUMA ID as a prefix for the
>>>> clock names on multi-socket platforms.
>>>>
>>>> Use 'sizeof(info->name)' in the strscpy() and snprintf() functions to
>>>> future proof against anyone changing the size of the 'name' array.
>>>>
>>>> Co-developed-by: Timo Alho <talho@nvidia.com>
>>>> Signed-off-by: Timo Alho <talho@nvidia.com>
>>>> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
>>>> ---
>>>> Changes since V1:
>>>> - Use NUMA ID as a prefix and not a suffix for the clock name.
>>>>
>>>>    drivers/clk/tegra/clk-bpmp.c | 10 +++++++++-
>>>>    1 file changed, 9 insertions(+), 1 deletion(-)
>>>
>>> Reviewed-by: Thierry Reding <treding@nvidia.com>
>>
>>
>> Please let me know if you have any comments on this or if this is OK to be
>> picked up now?
> 
> I made a pull for Stephen last week for various clk patches that were
> missed during the last merge window. I included your patch.
> 
> https://lore.kernel.org/linux-clk/akLzCVzbMbUsgDda@redhat.com/
> 
> I'm going to collect up stuff at rc6 this development cycle and assemble
> another pull then.

OK great! Thanks!

Jon

-- 
nvpublic