Re: [PATCH 2/6] net: ipa: fix event ring index not programmed for IPA v5.0+

[Simon Horman]

On Fri, Apr 03, 2026 at 06:43:48PM +0200, Luca Weiss wrote:
> From: Alexander Koskovich <akoskovich@xxxxx>
> 
> For IPA v5.0+, the event ring index field moved from CH_C_CNTXT_0 to
> CH_C_CNTXT_1. The v5.0 register definition intended to define this
> field in the CH_C_CNTXT_1 fmask array but used the old identifier of
> ERINDEX instead of CH_ERINDEX.
> 
> Without a valid event ring, GSI channels could never signal transfer
> completions. This caused gsi_channel_trans_quiesce() to block
> forever in wait_for_completion().
> 
> At least for IPA v5.2 this resolves an issue seen where runtime
> suspend, system suspend, and remoteproc stop all hanged forever. It
> also meant the IPA data path was completely non functional.
> 
> Fixes: faf0678ec8a0 ("net: ipa: add IPA v5.0 GSI register definitions")
> Signed-off-by: Alexander Koskovich <akoskovich@xxxxx>
> Signed-off-by: Luca Weiss <luca.weiss@xxxxxxxxxxxxx>

Reviewed-by: Simon Horman <horms@xxxxxxxxxx>