38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
From f3551d3640f3436b0e5505fd208cbd7bbfef411f Mon Sep 17 00:00:00 2001
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From: Amit Shah <amit.shah@redhat.com>
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Date: Fri, 2 Dec 2011 15:42:55 +0530
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Subject: [PATCH] char: Disable write callback if throttled chardev is
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detached
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If a throttled chardev is detached from the frontend device, all future
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callbacks should be suppressed. Not doing this results in a segfault.
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Bugzilla: 745758
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Upstream: Not applicable, since throttling is a RHEL6-only feature.
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Signed-off-by: Amit Shah <amit.shah@redhat.com>
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Signed-off-by: Cole Robinson <crobinso@redhat.com>
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---
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qemu-char.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/qemu-char.c b/qemu-char.c
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index bfc94a5..67a6d73 100644
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--- a/qemu-char.c
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+++ b/qemu-char.c
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@@ -223,6 +223,11 @@ void qemu_chr_add_handlers(CharDriverState *s,
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++s->avail_connections;
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}
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if (!handlers) {
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+ if (s->write_blocked) {
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+ /* Ensure we disable the callback if we were throttled */
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+ s->chr_disable_write_fd_handler(s);
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+ /* s->write_blocked is cleared below */
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+ }
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handlers = &null_handlers;
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}
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s->chr_can_read = handlers->fd_can_read;
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--
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1.7.12.1
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