On 08/01/2025 19:24, Sudheer Kumar Doredla wrote:
> CPSW ALE has 75-bit ALE entries stored across three 32-bit words.
> The cpsw_ale_get_field() and cpsw_ale_set_field() functions support
> ALE field entries spanning up to two words at the most.
>
> The cpsw_ale_get_field() and cpsw_ale_set_field() functions work as
> expected when ALE field spanned across word1 and word2, but fails when
> ALE field spanned across word2 and word3.
>
> For example, while reading the ALE field spanned across word2 and word3
> (i.e. bits 62 to 64), the word3 data shifted to an incorrect position
> due to the index becoming zero while flipping.
> The same issue occurred when setting an ALE entry.
>
> This issue has not been seen in practice but will be an issue in the future
> if the driver supports accessing ALE fields spanning word2 and word3
>
> Fix the methods to handle getting/setting fields spanning up to two words.
>
> Fixes: b685f1a58956 ("net: ethernet: ti: cpsw_ale: Fix cpsw_ale_get_field()/cpsw_ale_set_field()")
> Signed-off-by: Sudheer Kumar Doredla <s-doredla@xxxxxx>
> Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Reviewed-by: Roger Quadros <rogerq@xxxxxxxxxx>
--
cheers,
-roger
