[GIT PULL] firmware: arm_ffa: Fix for v7.1

[GIT PULL] firmware: arm_ffa: Fix for v7.1

[Sudeep Holla]

Hi ARM SoC Team,

Please pull ! This is the only fix/update I have at the moment for v7.1
So, I am sending it early as fix but late as an update for v7.1.

Regards,
Sudeep

-->8

The following changes since commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f:

  Linux 7.0-rc1 (2026-02-22 13:18:59 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/ffa-fix-7.1

for you to fetch changes up to 83210251fd70d5f96bcdc8911e15f7411a6b2463:

  firmware: arm_ffa: Use the correct buffer size during RXTX_MAP (2026-04-07 10:47:42 +0100)

----------------------------------------------------------------
Arm FF-A fix for v7.1

Use the page aligned backing allocation size when computing the RXTX_MAP
page count. This fixes FF-A RX/TX buffer registration on kernels built
with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
larger aligned span than the discovered minimum buffer size.

----------------------------------------------------------------
Sebastian Ene (1):
      firmware: arm_ffa: Use the correct buffer size during RXTX_MAP

 drivers/firmware/arm_ffa/driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Re: [GIT PULL] firmware: arm_ffa: Fix for v7.1

[Krzysztof Kozlowski]

On Tue, Apr 07, 2026 at 11:08:39AM +0100, Sudeep Holla wrote:
> Hi ARM SoC Team,
> 
> Please pull ! This is the only fix/update I have at the moment for v7.1
> So, I am sending it early as fix but late as an update for v7.1.
> 
> Regards,
> Sudeep
> 
> -->8
> 
> The following changes since commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f:
> 
>   Linux 7.0-rc1 (2026-02-22 13:18:59 -0800)
> 
> are available in the Git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/ffa-fix-7.1
> 
> for you to fetch changes up to 83210251fd70d5f96bcdc8911e15f7411a6b2463:
> 
>   firmware: arm_ffa: Use the correct buffer size during RXTX_MAP (2026-04-07 10:47:42 +0100)
> 
> ----------------------------------------------------------------
> Arm FF-A fix for v7.1
> 
> Use the page aligned backing allocation size when computing the RXTX_MAP
> page count. This fixes FF-A RX/TX buffer registration on kernels built
> with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
> larger aligned span than the discovered minimum buffer size.

Can we avoid per-driver trees or pulls? You do maintain also ARM SCMI
firmware driver, so this could be sent together? I think you also use
the same Git tree, right?


Thanks, applied

Best regards,
Krzysztof

Re: [GIT PULL] firmware: arm_ffa: Fix for v7.1

[Sudeep Holla]

On Sat, Apr 11, 2026 at 10:49:50AM +0200, Krzysztof Kozlowski wrote:
> On Tue, Apr 07, 2026 at 11:08:39AM +0100, Sudeep Holla wrote:
> > Hi ARM SoC Team,
> > 
> > Please pull ! This is the only fix/update I have at the moment for v7.1
> > So, I am sending it early as fix but late as an update for v7.1.
> > 
> > Regards,
> > Sudeep
> > 
> > -->8
> > 
> > The following changes since commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f:
> > 
> >   Linux 7.0-rc1 (2026-02-22 13:18:59 -0800)
> > 
> > are available in the Git repository at:
> > 
> >   git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/ffa-fix-7.1
> > 
> > for you to fetch changes up to 83210251fd70d5f96bcdc8911e15f7411a6b2463:
> > 
> >   firmware: arm_ffa: Use the correct buffer size during RXTX_MAP (2026-04-07 10:47:42 +0100)
> > 
> > ----------------------------------------------------------------
> > Arm FF-A fix for v7.1
> > 
> > Use the page aligned backing allocation size when computing the RXTX_MAP
> > page count. This fixes FF-A RX/TX buffer registration on kernels built
> > with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
> > larger aligned span than the discovered minimum buffer size.
> 
> Can we avoid per-driver trees or pulls? You do maintain also ARM SCMI
> firmware driver, so this could be sent together? I think you also use
> the same Git tree, right?
> 

Sure, I can put all of the firmware drivers I maintain together. I had
for some reason assumed individual PR is preferred.

-- 
Regards,
Sudeep

Re: [GIT PULL] firmware: arm_ffa: Fix for v7.1

[Arnd Bergmann]

On Sat, Apr 11, 2026, at 19:35, Sudeep Holla wrote:
> On Sat, Apr 11, 2026 at 10:49:50AM +0200, Krzysztof Kozlowski wrote:
>> On Tue, Apr 07, 2026 at 11:08:39AM +0100, Sudeep Holla wrote:
>> > ----------------------------------------------------------------
>> > Arm FF-A fix for v7.1
>> > 
>> > Use the page aligned backing allocation size when computing the RXTX_MAP
>> > page count. This fixes FF-A RX/TX buffer registration on kernels built
>> > with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
>> > larger aligned span than the discovered minimum buffer size.
>> 
>> Can we avoid per-driver trees or pulls? You do maintain also ARM SCMI
>> firmware driver, so this could be sent together? I think you also use
>> the same Git tree, right?
>
> Sure, I can put all of the firmware drivers I maintain together. I had
> for some reason assumed individual PR is preferred.

To me, that's a function of how complex the changes are and how
you describe them in the changelog text: If you have a lot of changes
for the merge window, having one branch per firmware type probably
works best, or even multiple ones if you have a series that implements
something new and a number of random changes do existing code.

If you have only a handful of bugfixes across multiple firmware
subsystems, a single 'firmware fixes' is less work for all of
us, with no loss of readability in the git history.

      Arnd

Re: [GIT PULL] firmware: arm_ffa: Fix for v7.1

[Sudeep Holla]

On Mon, Apr 13, 2026 at 08:23:58AM +0200, Arnd Bergmann wrote:
> On Sat, Apr 11, 2026, at 19:35, Sudeep Holla wrote:
> > On Sat, Apr 11, 2026 at 10:49:50AM +0200, Krzysztof Kozlowski wrote:
> >> On Tue, Apr 07, 2026 at 11:08:39AM +0100, Sudeep Holla wrote:
> >> > ----------------------------------------------------------------
> >> > Arm FF-A fix for v7.1
> >> > 
> >> > Use the page aligned backing allocation size when computing the RXTX_MAP
> >> > page count. This fixes FF-A RX/TX buffer registration on kernels built
> >> > with 16K/64K PAGE_SIZE, where alloc_pages_exact() backs the buffer with a
> >> > larger aligned span than the discovered minimum buffer size.
> >> 
> >> Can we avoid per-driver trees or pulls? You do maintain also ARM SCMI
> >> firmware driver, so this could be sent together? I think you also use
> >> the same Git tree, right?
> >
> > Sure, I can put all of the firmware drivers I maintain together. I had
> > for some reason assumed individual PR is preferred.
> 
> To me, that's a function of how complex the changes are and how
> you describe them in the changelog text: If you have a lot of changes
> for the merge window, having one branch per firmware type probably
> works best, or even multiple ones if you have a series that implements
> something new and a number of random changes do existing code.
> 
> If you have only a handful of bugfixes across multiple firmware
> subsystems, a single 'firmware fixes' is less work for all of
> us, with no loss of readability in the git history.
> 

Understood, will try to follow something along these in the future.

-- 
Regards,
Sudeep