7a3fc19192
FreeBSD-16:04.hyperv FreeBSD-16:05.hv_netvsc FreeBSD-SA-16:14.openssh FreeBSD-SA-16:15.sysarch
48 lines
1.2 KiB
Diff
48 lines
1.2 KiB
Diff
--- sys/dev/hyperv/utilities/hv_kvp.c.orig
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+++ sys/dev/hyperv/utilities/hv_kvp.c
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@@ -44,6 +44,7 @@
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#include <sys/reboot.h>
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#include <sys/lock.h>
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#include <sys/taskqueue.h>
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+#include <sys/selinfo.h>
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#include <sys/sysctl.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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@@ -114,6 +115,8 @@
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static struct hv_kvp_msg *hv_kvp_dev_buf;
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struct proc *daemon_task;
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+static struct selinfo hv_kvp_selinfo;
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+
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/*
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* Global state to track and synchronize multiple
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* KVP transaction requests from the host.
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@@ -628,6 +631,9 @@
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/* Send the msg to user via function deamon_read - setting sema */
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sema_post(&kvp_globals.dev_sema);
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+
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+ /* We should wake up the daemon, in case it's doing poll() */
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+ selwakeup(&hv_kvp_selinfo);
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}
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@@ -940,7 +946,7 @@
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* for daemon to read.
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*/
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static int
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-hv_kvp_dev_daemon_poll(struct cdev *dev __unused, int events, struct thread *td __unused)
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+hv_kvp_dev_daemon_poll(struct cdev *dev __unused, int events, struct thread *td)
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{
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int revents = 0;
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@@ -953,6 +959,9 @@
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*/
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if (kvp_globals.daemon_busy == true)
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revents = POLLIN;
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+ else
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+ selrecord(td, &hv_kvp_selinfo);
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+
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mtx_unlock(&kvp_globals.pending_mutex);
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return (revents);
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