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Date: Wed, 23 Mar 2011 17:18:14 +0000 From: Ben Hutchings <bhutchings@...arflare.com> To: Ajit.Khaparde@...lex.Com Cc: netdev@...r.kernel.org Subject: Re: [PATCH ethtool] ethtool: Report driver features described in struct ethtool_drvinfo On Fri, 2011-03-18 at 22:44 +0000, Ben Hutchings wrote: > On Fri, 2011-03-18 at 15:07 -0700, Ajit.Khaparde@...lex.Com wrote: > > ________________________________________ > > From: Ben Hutchings [bhutchings@...arflare.com] > > Sent: Friday, March 18, 2011 5:00 PM > > To: Khaparde, Ajit > > Cc: netdev@...r.kernel.org > > Subject: RE: [RFC] ethtool: Display reg dump length via get driver info. > > > > > On Fri, 2011-03-18 at 14:52 -0700, Ajit.Khaparde@...lex.Com wrote: > > >> ______________________________________ > > >> From: Ben Hutchings [bhutchings@...arflare.com] > > >> Sent: Friday, March 18, 2011 4:32 PM > > >> To: Khaparde, Ajit > > >> Cc: netdev@...r.kernel.org > > >> Subject: Re: [RFC] ethtool: Display reg dump length via get driver info. > > >> > > >> On Fri, 2011-03-18 at 16:06 -0500, Ajit Khaparde wrote: > > >> >> Devices like BE store Reg Dump Data in the hardware. > > >> > > > >> Where else would it be? > > >> > > >> Well yes. That's true. > > >> > > >> >> This change will allow to just peek into the hardware > > >> >> to see if any data is available for a dump and analysis, > > >> >> without actually dumping the register data. > > >> > [...] > > >> > > >> > This is wrong. ethtool_ops::get_regs_len really should return a > > >> > constant, otherwise ethtool (and the kernel) cannot allocate a buffer of > > >> > the right size. If the size of a dump really does vary then make it > > >> > return the maximum possible size for the device. > > >> > > >> Yes, it is a constant size. And will always be the max size possible. > > >> I just want to see if I can get the length, without really making the ethtoool -d call. > > >> Because that will trigger the dump too. > > >> At that moment, I may not be interested in the data itself. > > > > > OK, so what you're really interested in is 'does this version of the > > > driver support register dump'? > > > > Yes. I did not want to add another option in ethtool to get this info out. > > So, how about this? [...] I've applied this change. Ben. -- Ben Hutchings, Senior Software Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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