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

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Date:   Sat, 23 Feb 2019 12:14:39 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Kimberly Brown <kimbrownkd@...il.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...rosoft.com,
        linux-hyperv@...r.kernel.org, kys@...rosoft.com,
        haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        linux-kernel@...r.kernel.org,
        Michael Kelley <mikelley@...rosoft.com>
Subject: Re: [GIT PULL v3] Hyper-V commits for 5.0-rc

On Sat, Feb 23, 2019 at 11:47:49AM -0500, Kimberly Brown wrote:
>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?
>>
>
>The correct link to the "Drivers: hv: vmbus: Return -EINVAL if
>monitor_allocated not set" patch thread is:
>
>https://lore.kernel.org/lkml/cover.1549619051.git.kimbrownkd@gmail.com/
>
>
>Also, this patch doesn't fix a race condition; it fixes a problem with
>sysfs returning invalid data.

You're right, I had your other patch in mind when I wrote that log
message.

Are you familiar with Greg's objection to the patch? It's not in the
thread you linked to either.

--
Thanks,
Sasha