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| author | K. Y. Srinivasan <kys@microsoft.com> | 2017-08-11 20:03:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-16 19:16:29 +0300 |
| commit | 6f3d791f300618caf82a2be0c27456edd76d5164 (patch) | |
| tree | b92051bd127b0e5a0482f7eabe9d97e1986c9c00 /drivers/hv/vmbus_drv.c | |
| parent | 3f2baa8a7d2efaa836f1dc4b8ee8c3ca4ba9e101 (diff) | |
| download | linux-6f3d791f300618caf82a2be0c27456edd76d5164.tar.xz | |
Drivers: hv: vmbus: Fix rescind handling issues
This patch handles the following issues that were observed when we are
handling racing channel offer message and rescind message for the same
offer:
1. Since the host does not respond to messages on a rescinded channel,
in the current code, we could be indefinitely blocked on the vmbus_open() call.
2. When a rescinded channel is being closed, if there is a pending interrupt on the
channel, we could end up freeing the channel that the interrupt handler would run on.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index ed84e96715a0..43160a2eafe0 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -940,6 +940,9 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu) if (channel->offermsg.child_relid != relid) continue; + if (channel->rescind) + continue; + switch (channel->callback_mode) { case HV_CALL_ISR: vmbus_channel_isr(channel); |