Re: [PATCH v2 3/3] firmware: qcom: scm: Fix tzmem state on probe retry

[Konrad Dybcio]

On 6/29/26 4:17 PM, Mukesh Ojha wrote:
> qcom_tzmem_enable() returns -EBUSY if called a second time, but this
> causes probe retries to fail permanently if a later step in
> qcom_scm_probe() defers after qcom_tzmem_enable() has already succeeded.
> 
> Use DO_ONCE() to ensure qcom_tzmem_init() runs exactly once across all
> calls in a thread-safe manner. qcom_tzmem_dev is set on every call since
> probe retries use the same device pointer. The result of the first
> initialisation is cached and returned to every subsequent caller.
> 
> Fixes: 40289e35ca52 ("firmware: qcom: scm: enable the TZ mem allocator")
> Signed-off-by: Mukesh Ojha <mukesh.ojha@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad