From: <gregkh@linuxfoundation.org>
To: stephen@networkplumber.org, alexander.levin@microsoft.com,
gregkh@linuxfoundation.org, sthemmin@microsoft.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "uio_hv_generic: check that host supports monitor page" has been added to the 4.15-stable tree
Date: Mon, 09 Apr 2018 11:37:00 +0200 [thread overview]
Message-ID: <15232666206063@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
uio_hv_generic: check that host supports monitor page
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
uio_hv_generic-check-that-host-supports-monitor-page.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Stephen Hemminger <stephen@networkplumber.org>
Date: Tue, 9 Jan 2018 12:57:31 -0800
Subject: uio_hv_generic: check that host supports monitor page
From: Stephen Hemminger <stephen@networkplumber.org>
[ Upstream commit 06028d15177a1b406b7b075ea47c6a352732f23a ]
In order for userspace application to signal host, it needs the
host to support the monitor page property. Check for the flag
and fail if this is not supported.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/uio/uio_hv_generic.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -124,6 +124,13 @@ hv_uio_probe(struct hv_device *dev,
if (ret)
goto fail;
+ /* Communicating with host has to be via shared memory not hypercall */
+ if (!dev->channel->offermsg.monitor_allocated) {
+ dev_err(&dev->device, "vmbus channel requires hypercall\n");
+ ret = -ENOTSUPP;
+ goto fail_close;
+ }
+
dev->channel->inbound.ring_buffer->interrupt_mask = 1;
set_channel_read_mode(dev->channel, HV_CALL_DIRECT);
Patches currently in stable-queue which might be from stephen@networkplumber.org are
queue-4.15/uio_hv_generic-check-that-host-supports-monitor-page.patch
reply other threads:[~2018-04-09 9:40 UTC|newest]
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