From: Logan Gunthorpe <logang@deltatee.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
Keith Busch <keith.busch@intel.com>,
Myron Stowe <myron.stowe@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Jonathan Corbet <corbet@lwn.net>,
"David S. Miller" <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>,
Emil Velikov <emil.l.velikov@gmail.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>,
Stefan Berger <stefanb@linux.vnet.ibm.com>,
Wei Zhang <wzhang@fb.com>,
Kurt Schwemmer <kurt.schwemmer@microsemi.com>,
Stephen Bates <stephen.bates@microsemi.com>,
linux-pci@vger.kernel.org, linux-doc@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 0/4] New Microsemi PCI Switch Management Driver
Date: Wed, 1 Mar 2017 17:29:27 -0700 [thread overview]
Message-ID: <8e20a911-988b-b486-4530-2525efc8b2c2@deltatee.com> (raw)
In-Reply-To: <7d6b3b59-5cec-d73f-b65c-4d685ccc70f8@deltatee.com>
On 01/03/17 05:23 PM, Logan Gunthorpe wrote:
> Because of how poll works, I don't see how I can just hold a semaphore
> inside every fops call like the tpm code does.
On 01/03/17 04:58 PM, Jason Gunthorpe wrote:
> Both infiniband and TPM have the 'detach' flavour of unplug where the
> user is not forced to close their open cdevs. For simpler cases you
> can just wait for all cdevs to close with a simple rwsem, much like
> sysfs does already during device_del.
Though, after reading your email again, a hard fence on close sounds
like a good idea. Tomorrow I'll post a v6 that uses that approach.
Thanks,
Logan
next prev parent reply other threads:[~2017-03-02 1:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-26 6:53 [PATCH v5 0/4] New Microsemi PCI Switch Management Driver Logan Gunthorpe
2017-02-26 6:53 ` [PATCH v5 1/4] MicroSemi Switchtec management interface driver Logan Gunthorpe
2017-02-26 6:53 ` [PATCH v5 2/4] switchtec: Add user interface documentation Logan Gunthorpe
2017-02-26 6:53 ` [PATCH v5 3/4] switchtec: Add sysfs attributes to the Switchtec driver Logan Gunthorpe
2017-02-26 6:53 ` [PATCH v5 4/4] switchtec: Add IOCTLs " Logan Gunthorpe
2017-02-28 15:09 ` [PATCH v5 0/4] New Microsemi PCI Switch Management Driver Bjorn Helgaas
2017-02-28 17:11 ` Logan Gunthorpe
2017-02-28 17:20 ` Greg Kroah-Hartman
2017-03-02 0:32 ` Bjorn Helgaas
2017-03-02 0:39 ` Logan Gunthorpe
2017-03-01 21:41 ` Bjorn Helgaas
2017-03-01 22:24 ` Logan Gunthorpe
2017-03-01 22:49 ` Logan Gunthorpe
2017-03-01 23:58 ` Jason Gunthorpe
2017-03-02 0:23 ` Logan Gunthorpe
2017-03-02 0:29 ` Logan Gunthorpe [this message]
2017-03-02 0:50 ` Jason Gunthorpe
2017-03-01 22:26 ` Keith Busch
2017-03-01 22:37 ` Logan Gunthorpe
2017-03-01 22:59 ` Keith Busch
2017-03-01 22:53 ` Logan Gunthorpe
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