Re: [PATCH] wlcore: time sync : add support for 64 bit clock

From	Johannes Berg <johannes@sipsolutions.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH] wlcore: time sync : add support for 64 bit clock
Date	2016-06-23 13:20 +0200
Message-ID	<rNaPT-IX-1@gated-at.bofh.it> (permalink)
References	<rNaPT-IX-3@gated-at.bofh.it> <rNaPT-IX-5@gated-at.bofh.it> <rNaPT-IX-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, 2016-06-23 at 14:12 +0300, Yaniv Machani wrote:
> Changed the configuration to support 64bit instead of 32bit
> this in order to offload the driver from handling a wraparound.

[...]

Since you Cc'ed me, and presumably want me to review it, I'll say that
this looks like a terrible idea:

> @@ -74,10 +74,16 @@ struct wl18xx_event_mailbox {

This struct is evidently used for firmware/host communication.

>  	__le16 bss_loss_bitmap;
>  
>  	/* bitmap of stations (by HLID) which exceeded max tx
> retries */
> -	__le32 tx_retry_exceeded_bitmap;
> +	__le16 tx_retry_exceeded_bitmap;
> +
> +	/* time sync high msb*/
> +	u16 time_sync_tsf_high_msb;

So first of all, just using u16 instead of __le16 seems wrong.

Additionally, this looks like it changes the firmware API, so that
older firmware images will no longer work?

johannes

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Re: [PATCH] wlcore: time sync : add support for 64 bit clock Johannes Berg <johannes@sipsolutions.net> - 2016-06-23 13:20 +0200
  RE: [PATCH] wlcore: time sync : add support for 64 bit clock "Machani, Yaniv" <yanivma@ti.com> - 2016-06-23 13:40 +0200
    Re: [PATCH] wlcore: time sync : add support for 64 bit clock Johannes Berg <johannes@sipsolutions.net> - 2016-06-23 13:40 +0200

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