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authorK. Y. Srinivasan <kys@microsoft.com>2017-09-30 06:09:36 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-10-04 11:25:09 +0200
commit192b2d78722ffea188e5ec6ae5d55010dce05a4b (patch)
treef48582ce3f3c880fa6c57452abe029d66bad04ff /drivers/hv/vmbus_drv.c
parentmei: me: add gemini lake devices id (diff)
downloadlinux-192b2d78722ffea188e5ec6ae5d55010dce05a4b.tar.xz
linux-192b2d78722ffea188e5ec6ae5d55010dce05a4b.zip
Drivers: hv: vmbus: Fix bugs in rescind handling
This patch addresses the following bugs in the current rescind handling code: 1. Fixes a race condition where we may be invoking hv_process_channel_removal() on an already freed channel. 2. Prevents indefinite wait when rescinding sub-channels by correctly setting the probe_complete state. I would like to thank Dexuan for patiently reviewing earlier versions of this patch and identifying many of the issues fixed here. Greg, please apply this to 4.14-final. Fixes: '54a66265d675 ("Drivers: hv: vmbus: Fix rescind handling")' Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Dexuan Cui <decui@microsoft.com> Cc: stable@vger.kernel.org # (4.13 and above) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index a9d49f6f6501..937801ac2fe0 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -768,8 +768,7 @@ static void vmbus_device_release(struct device *device)
struct vmbus_channel *channel = hv_dev->channel;
mutex_lock(&vmbus_connection.channel_mutex);
- hv_process_channel_removal(channel,
- channel->offermsg.child_relid);
+ hv_process_channel_removal(channel->offermsg.child_relid);
mutex_unlock(&vmbus_connection.channel_mutex);
kfree(hv_dev);