hyperv/vmbus: Don't close unopened channels.
MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8566
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=309132
@ -688,10 +688,28 @@ vmbus_chan_close_internal(struct vmbus_channel *chan)
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struct vmbus_softc *sc = chan->ch_vmbus;
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struct vmbus_msghc *mh;
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struct vmbus_chanmsg_chclose *req;
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uint32_t old_stflags;
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int error;
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/* TODO: stringent check */
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atomic_clear_int(&chan->ch_stflags, VMBUS_CHAN_ST_OPENED);
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/*
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* NOTE:
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* Sub-channels are closed upon their primary channel closing,
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* so they can be closed even before they are opened.
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*/
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for (;;) {
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old_stflags = chan->ch_stflags;
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if (atomic_cmpset_int(&chan->ch_stflags, old_stflags,
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old_stflags & ~VMBUS_CHAN_ST_OPENED))
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break;
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}
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if ((old_stflags & VMBUS_CHAN_ST_OPENED) == 0) {
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/* Not opened yet; done */
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if (bootverbose) {
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vmbus_chan_printf(chan, "chan%u not opened\n",
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chan->ch_id);
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}
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return;
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}
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/*
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* Free this channel's sysctl tree attached to its device's
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