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| author | Dexuan Cui <decui@microsoft.com> | 2017-10-19 18:07:35 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-27 08:38:08 (GMT) |
| commit | 13c5e97701091f9b02ded0c68809f8a6b08c747a (patch) | |
| tree | 42f2bd4e958586f86cc03271a8e17fd4ee401f96 /include | |
| parent | 1c33c8f8a727a86f4a8f457a5afa4d6e8198dee5 (diff) | |
| download | linux-13c5e97701091f9b02ded0c68809f8a6b08c747a.tar.xz | |
vmbus: fix missing signaling in hv_signal_on_read()
[Fixes upstream in a much larger set of patches that are not worth backporting
to 4.9 - gregkh]
When the space available before start of reading (cached_write_sz)
is the same as the host required space (pending_sz), we need to
still signal host.
Fixes: 433e19cf33d3 ("Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()")
Signed-off-by: John Starks <jon.Starks@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hyperv.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index d596a07..8cc99de 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1521,11 +1521,11 @@ static inline void hv_signal_on_read(struct vmbus_channel *channel) cur_write_sz = hv_get_bytes_to_write(rbi); - if (cur_write_sz < pending_sz) + if (cur_write_sz <= pending_sz) return; cached_write_sz = hv_get_cached_bytes_to_write(rbi); - if (cached_write_sz < pending_sz) + if (cached_write_sz <= pending_sz) vmbus_setevent(channel); return; |