diff options
| author | K. Y. Srinivasan <kys@microsoft.com> | 2016-02-27 02:13:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-02 03:57:20 +0300 |
| commit | b9830d120cbe155863399f25eaef6aa8353e767f (patch) | |
| tree | 7aeea7c18f0ba6ac4c3b73658fc1c27db718fd17 /include/linux/hyperv.h | |
| parent | d452ab7b4c65dfcaee88a0d6866eeeb98a3d1884 (diff) | |
| download | linux-b9830d120cbe155863399f25eaef6aa8353e767f.tar.xz | |
Drivers: hv: util: Pass the channel information during the init call
Pass the channel information to the util drivers that need to defer
reading the channel while they are processing a request. This would address
the following issue reported by Vitaly:
Commit 3cace4a61610 ("Drivers: hv: utils: run polling callback always in
interrupt context") removed direct *_transaction.state = HVUTIL_READY
assignments from *_handle_handshake() functions introducing the following
race: if a userspace daemon connects before we get first non-negotiation
request from the server hv_poll_channel() won't set transaction state to
HVUTIL_READY as (!channel) condition will fail, we set it to non-NULL on
the first real request from the server.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index d23dab0d770b..aa0fadce9308 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1251,6 +1251,7 @@ u64 hv_do_hypercall(u64 control, void *input, void *output); struct hv_util_service { u8 *recv_buffer; + void *channel; void (*util_cb)(void *); int (*util_init)(struct hv_util_service *); void (*util_deinit)(void); |