Re: [PATCH] crypto: atmel-tdes - zero-initialize device state

[Thorsten Blum]

On Sat, Aug 29, 2026 at 05:58:21AM +0200, Karl Mehltretter wrote:
> Commit c659d07f11a3 ("crypto: atmel-tdes - Switch to managed version of
> kzalloc") accidentally replaced kzalloc() with devm_kmalloc(), so the
> device state is no longer zeroed.
> 
> atmel_tdes_hw_init() tests dd->flags during probe: a stale TDES_FLAGS_INIT
> skips the hardware reset, and a stale TDES_FLAGS_BUSY makes
> atmel_tdes_handle_queue() treat the engine as permanently busy, leaving
> every request queued and never dispatched.
> 
> Seen on a SAM9X75 Curiosity: the first TDES request after boot never
> completes and the TDES interrupt count stays at zero, while the AES and
> SHA engines on the same SoC work normally.
> 
> Switch to devm_kzalloc(), matching the Atmel AES and SHA drivers.
> 
> Fixes: c659d07f11a3 ("crypto: atmel-tdes - Switch to managed version of kzalloc")
> Cc: stable@xxxxxxxxxxxxxxx
> Assisted-by: LLM
> Signed-off-by: Karl Mehltretter <kmehltretter@xxxxxxxxx>
> ---
>  drivers/crypto/atmel-tdes.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

LGTM, thanks.

Reviewed-by: Thorsten Blum <blum@xxxxxxxxxx>