[PATCH] wifi: ath12k: remove reserve member of wbm completion structure

[Thiraviyam Mariyappan (Temp)]

> -----Original Message-----
> From: Jeff Johnson (QUIC) <quic_jjohnson at quicinc.com>
> Sent: Friday, March 1, 2024 10:23 PM
> To: Thiraviyam Mariyappan (Temp) (QUIC) <quic_tmariyap at quicinc.com>;
> ath12k at lists.infradead.org
> Cc: linux-wireless at vger.kernel.org
> Subject: Re: [PATCH] wifi: ath12k: remove reserve member of wbm
> completion structure
> 
> On 3/1/2024 1:19 AM, quic_tmariyap at quicinc.com wrote:
> > From: Thiraviyam Mariyappan <quic_tmariyap at quicinc.com>
> >
> > In tx completion, status desc obtained from offsetting the address
> > from wbm ring. Having reserved 8 bytes in status desc offsets the
> > address twice and read the values from the incorrect address.
> > So, removing the reserved 8 bytes from wbm completion structure.
> 
> Why not instead remove the addition of
> HTT_TX_WBM_COMP_STATUS_OFFSET in
> ath12k_dp_tx_process_htt_tx_complete()?
Similar to ath11k, removed this member from the structure. Will check and address in next patch version.
> 
> That would remove an unnecessary operation in the data path.
> 
> >
> > Also this patch is applicable for WCN7850.
> >
> > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-
> QCAHKSWPL_SILICONZ-1
> >
> > Signed-off-by: Thiraviyam Mariyappan <quic_tmariyap at quicinc.com>
> > ---
> >  drivers/net/wireless/ath/ath12k/dp.h | 1 -
> >  1 file changed, 1 deletion(-)
> >
> > diff --git a/drivers/net/wireless/ath/ath12k/dp.h
> > b/drivers/net/wireless/ath/ath12k/dp.h
> > index eb2dd408e081..d01fc0b0c9a5 100644
> > --- a/drivers/net/wireless/ath/ath12k/dp.h
> > +++ b/drivers/net/wireless/ath/ath12k/dp.h
> > @@ -387,7 +387,6 @@ struct ath12k_dp {
> >  #define HTT_TX_WBM_COMP_INFO2_ACK_RSSI
> 	GENMASK(31, 24)
> >
> >  struct htt_tx_wbm_completion {
> > -	__le32 rsvd0[2];
> >  	__le32 info0;
> >  	__le32 info1;
> >  	__le32 info2;