[v7] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

[PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Bence Csókás 4 months ago

The probe function of the atmel-quadspi driver got quite convoluted,
especially since the addition of SAMA7G5 support, that was forward-ported
from an older vendor kernel. To alleivate this - and similar problems in
the future - an effort was made to migrate as many functions as possible,
to their devm_ managed counterparts. Patch 1/2 adds the new
`devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
simplify the probe() function.

Change in v4:
* split PM imbalance fix (now merged) and DMA cleanup (this series)
Change in v6:
* rebase to spi/for-next
Change in v7:
* rebase to dma/next

[1]
commit 3c018bf5a0ee ("dmaengine: idxd: Remove unused pointer and macro")

Links to previous versions:
pre-series:
https://lore.kernel.org/linux-kernel/20241222141427.819222-1-csokas.bence@prolan.hu/
https://lore.kernel.org/linux-kernel/20250114222851.1023194-1-csokas.bence@prolan.hu/
v1:
https://lore.kernel.org/linux-kernel/20250115160244.1102881-1-csokas.bence@prolan.hu/
v2:
https://lore.kernel.org/linux-kernel/20250124085221.766303-8-csokas.bence@prolan.hu/
v3:
https://lore.kernel.org/linux-kernel/20250207124802.165408-1-csokas.bence@prolan.hu/
v4:
https://lore.kernel.org/lkml/20250317135340.382532-1-csokas.bence@prolan.hu/
v5:
https://lore.kernel.org/lkml/20250505184936.312274-1-csokas.bence@prolan.hu
v6:
https://lore.kernel.org/lkml/20250515083132.255410-1-csokas.bence@prolan.hu

Bence Csókás (2):
  dma: Add devm_dma_request_chan()
  spi: atmel-quadspi: Use `devm_dma_request_chan()`

 drivers/dma/dmaengine.c     | 30 +++++++++++++++++++++++
 drivers/spi/atmel-quadspi.c | 48 ++++++++++---------------------------
 include/linux/dmaengine.h   |  7 ++++++
 3 files changed, 50 insertions(+), 35 deletions(-)


base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
-- 
2.43.0

Re: [PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Mark Brown 3 months, 2 weeks ago

On Tue, 10 Jun 2025 10:22:52 +0200, Bence Csókás wrote:
> The probe function of the atmel-quadspi driver got quite convoluted,
> especially since the addition of SAMA7G5 support, that was forward-ported
> from an older vendor kernel. To alleivate this - and similar problems in
> the future - an effort was made to migrate as many functions as possible,
> to their devm_ managed counterparts. Patch 1/2 adds the new
> `devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
> simplify the probe() function.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/2] dma: Add devm_dma_request_chan()
      (no commit info)
[2/2] spi: atmel-quadspi: Use `devm_dma_request_chan()`
      commit: 2555691165a0285a4617230fed859f20dcc51608

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Re: [PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Vinod Koul 3 months, 2 weeks ago

On Tue, 10 Jun 2025 10:22:52 +0200, Bence Csókás wrote:
> The probe function of the atmel-quadspi driver got quite convoluted,
> especially since the addition of SAMA7G5 support, that was forward-ported
> from an older vendor kernel. To alleivate this - and similar problems in
> the future - an effort was made to migrate as many functions as possible,
> to their devm_ managed counterparts. Patch 1/2 adds the new
> `devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
> simplify the probe() function.
> 
> [...]

Applied, thanks!

[1/2] dma: Add devm_dma_request_chan()
      commit: 08bf1663c21a3e815eda28fa242d84c945ca3b94
[2/2] spi: atmel-quadspi: Use `devm_dma_request_chan()`
      (no commit info)

Best regards,
-- 
~Vinod

Re: [PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Mark Brown 4 months ago

On Tue, Jun 10, 2025 at 10:22:52AM +0200, Bence Csókás wrote:

> to their devm_ managed counterparts. Patch 1/2 adds the new
> `devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
> simplify the probe() function.

I'm not copied on patch 1, please let me know if/when there's some
progress there.

Re: [PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Vinod Koul 3 months, 2 weeks ago

On 10-06-25, 12:49, Mark Brown wrote:
> On Tue, Jun 10, 2025 at 10:22:52AM +0200, Bence Csókás wrote:
> 
> > to their devm_ managed counterparts. Patch 1/2 adds the new
> > `devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
> > simplify the probe() function.
> 
> I'm not copied on patch 1, please let me know if/when there's some
> progress there.

You can pull in this tag for the dependency

The following changes since commit 19272b37aa4f83ca52bdf9c16d5d81bdd1354494:

  Linux 6.16-rc1 (2025-06-08 13:44:43 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git tags/dmaengine_devm_api

for you to fetch changes up to 08bf1663c21a3e815eda28fa242d84c945ca3b94:

  dmaengine: Add devm_dma_request_chan() (2025-06-26 15:18:04 -0700)

----------------------------------------------------------------
dmaengine: tag for devm api

----------------------------------------------------------------
Bence Csókás (1):
      dmaengine: Add devm_dma_request_chan()

 drivers/dma/dmaengine.c   | 30 ++++++++++++++++++++++++++++++
 include/linux/dmaengine.h |  7 +++++++
 2 files changed, 37 insertions(+)

Thanks
-- 
~Vinod

Re: (subset) [PATCH v7 0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Posted by Vinod Koul 3 months, 2 weeks ago

On Tue, 10 Jun 2025 10:22:52 +0200, Bence Csókás wrote:
> The probe function of the atmel-quadspi driver got quite convoluted,
> especially since the addition of SAMA7G5 support, that was forward-ported
> from an older vendor kernel. To alleivate this - and similar problems in
> the future - an effort was made to migrate as many functions as possible,
> to their devm_ managed counterparts. Patch 1/2 adds the new
> `devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
> simplify the probe() function.
> 
> [...]

Applied, thanks!

[1/2] dma: Add devm_dma_request_chan()
      commit: 56137a53f8ebb400f4098ca26ef18934e9a4de45

Best regards,
-- 
~Vinod