linux-kernel - Re: [GIT PULL v3] Hyper-V commits for 5.0-rc

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Message-ID: <20190224081710.GA23894@kroah.com>
Date:   Sun, 24 Feb 2019 09:17:10 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...rosoft.com, linux-hyperv@...r.kernel.org,
        kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL v3] Hyper-V commits for 5.0-rc

On Sat, Feb 23, 2019 at 10:55:33AM -0500, Sasha Levin wrote:
> On Sat, Feb 23, 2019 at 09:57:15AM +0100, Greg KH wrote:
> > On Fri, Feb 22, 2019 at 10:12:25PM -0500, Sasha Levin wrote:
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA512
> > > 
> > > The following changes since commit 8834f5600cf3c8db365e18a3d5cac2c2780c81e5:
> > > 
> > >   Linux 5.0-rc5 (2019-02-03 13:48:04 -0800)
> > > 
> > > are available in the Git repository at:
> > > 
> > >   git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git tags/hyperv-fixes-signed
> > > 
> > > for you to fetch changes up to b2946cd86f3c1b5b1262c0ec06068110c2328fe6:
> > > 
> > >   MAINTAINERS: Change mailing list for Hyper-V CORE AND DRIVERS (2019-02-22 21:46:37 -0500)
> > > 
> > > - ----------------------------------------------------------------
> > > Two fixes:
> > > 
> > > 1. A fix for a race condition reading sysfs entries while a device is
> > > being added, by Kimberly Brown.
> > > 
> > > 2. Update the Hyper-V mailing list to a new one created on
> > > vger.kernel.org, by Haiyang Zhang.
> > > 
> > > - ----------------------------------------------------------------
> > > Haiyang Zhang (1):
> > >       MAINTAINERS: Change mailing list for Hyper-V CORE AND DRIVERS
> > > 
> > > Kimberly Brown (2):
> > >       Drivers: hv: vmbus: Change server monitor_pages index to 0
> > >       Drivers: hv: vmbus: Return -EINVAL if monitor_allocated not set
> > 
> > I objected to this last patch when it was posted on the list.  The sysfs
> > file should just not be present if the functionality is not there, no
> > need to add the "-EINVAL" logic to it instead.
> > 
> > Having a sysfs file that says it can be read, and then rejecting that
> > read with an error is NOT ok.
> 
> Hm, I'm sorry but I didn't see an objection on the thread
> (https://lore.kernel.org/lkml/20190122020759.GA4054@ubu-Virtual-Machine/)
> which is why it was sent in like this.
> 
> Could you please point me to it so we can get the patch fixed up?

My response was Message-ID: <20190219061748.GA5819@...ah.com> sent:
	Date: Tue, 19 Feb 2019 07:17:48 +0100
but for some reason I do not see it on lore.kernel.org at all :(

I don't know what happened to it, sorry, it was also cc: to you.

Anyway, it just said what I said here, don't do this type of thing, if
the sysfs file is not valid for a specific device, just do not create
it, do not mess around with returning error values when trying to read
from it.

thanks,

greg k-h