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authorPaolo Bonzini <pbonzini@redhat.com>2016-06-20 15:02:40 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2016-06-29 14:03:47 +0200
commit6f1de6b70d857d5e316ae6fd908f52818b827b08 (patch)
tree1a0c8e85a0d1046373cdad821e9dda0025046be9 /qemu-char.c
parentb0585e7e07982daa578c3bfef7f6843c89f110a8 (diff)
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char: change qemu_chr_fe_add_watch to return unsigned
g_source_attach can return any value between 1 and UINT_MAX if you let QEMU run long enough. However, qemu_chr_fe_add_watch can also return a negative errno value when the device is disconnected or does not support chr_add_watch. Change it to return zero to avoid overloading these values. Fix the cadence_uart which asserts in this case (easily obtained with "-serial pty"). Tested-by: Bret Ketchum <bcketchum@gmail.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qemu-char.c')
-rw-r--r--qemu-char.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/qemu-char.c b/qemu-char.c
index 84f49ac..8575c54 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3966,19 +3966,19 @@ void qemu_chr_fe_event(struct CharDriverState *chr, int event)
}
}
-int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
- GIOFunc func, void *user_data)
+guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
+ GIOFunc func, void *user_data)
{
GSource *src;
guint tag;
if (s->chr_add_watch == NULL) {
- return -ENOSYS;
+ return 0;
}
src = s->chr_add_watch(s, cond);
if (!src) {
- return -EINVAL;
+ return 0;
}
g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);