| Message ID | 1407358469-20724-1-git-send-email-kamal@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 05827ec..ce5a9f2 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -319,9 +319,13 @@ static void process_chn_event(u32 relid) */ do { - hv_begin_read(&channel->inbound); + if (read_state) + hv_begin_read(&channel->inbound); channel->onchannel_callback(arg); - bytes_to_read = hv_end_read(&channel->inbound); + if (read_state) + bytes_to_read = hv_end_read(&channel->inbound); + else + bytes_to_read = 0; } while (read_state && (bytes_to_read != 0)); } else { pr_err("no channel callback for relid - %u\n", relid);
This is a note to let you know that I have just added a patch titled Drivers: hv: vmbus: Fix a bug in the channel callback dispatch code to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue This patch is scheduled to be released in version 3.13.11.6. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.13.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From c90ab52d57c9e68f72c41424a1db2582337ae95c Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" <kys@microsoft.com> Date: Mon, 7 Jul 2014 16:34:24 -0700 Subject: Drivers: hv: vmbus: Fix a bug in the channel callback dispatch code commit affb1aff300ddee54df307812b38f166e8a865ef upstream. Starting with Win8, we have implemented several optimizations to improve the scalability and performance of the VMBUS transport between the Host and the Guest. Some of the non-performance critical services cannot leverage these optimization since they only read and process one message at a time. Make adjustments to the callback dispatch code to account for the way non-performance critical drivers handle reading of the channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/hv/connection.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) -- 1.9.1