Re: [PATCH v2 2/3] scsi: ufs: core: Tolerate RX_FOM read failures in TX EQTR

[Peter Wang (王信友)]

On Thu, 2026-06-25 at 05:13 -0700, Can Guo wrote:
> ufshcd_get_rx_fom() aborted TX EQTR when a per-lane RX_FOM DME read
> failed.
> That makes the whole training flow fragile even though these reads
> can be
> treated as best effort.
> 
> Keep TX EQTR running by logging RX_FOM read failures and continuing.
> Make failed lanes deterministic by initializing each lane FOM to 0
> before
> reading and only updating it when the DME read succeeds. This avoids
> propagating stale or uninitialized values into EQTR evaluation.
> 
> Also update the kerneldoc return description to match behavior:
> RX_FOM
> DME read failures are handled as warnings, while get_rx_fom() vops
> failures are still propagated to the caller.
> 
> Signed-off-by: Can Guo <can.guo@xxxxxxxxxxxxxxxx>

Reviewed-by: Peter Wang <peter.wang@xxxxxxxxxxxx>