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iohandlers: fix issue with qemu_set_fd_handler() 

As spotted by Aneesh, some users pass a NULL opaque so we need to be more
aggressive in checking whether a user means to unregister.

Also fix a double free caused by tag not being reset to zero after delete.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-09-07 13:44:45 -05:00
parent 344eecf699
commit c82dc29a91
1 changed files with 2 additions and 5 deletions
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7
iohandler.c
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@ -93,10 +93,6 @@ static gboolean fd_trampoline(GIOChannel *chan, GIOCondition cond, gpointer opaq
{
IOTrampoline *tramp = opaque;
if (tramp->opaque == NULL) {
return FALSE;
}
if ((cond & G_IO_IN) && tramp->fd_read) {
tramp->fd_read(tramp->opaque);
}
@ -119,9 +115,10 @@ int qemu_set_fd_handler(int fd,
if (tramp->tag != 0) {
g_io_channel_unref(tramp->chan);
g_source_remove(tramp->tag);
tramp->tag = 0;
}
if (opaque) {
if (fd_read || fd_write || opaque) {
GIOCondition cond = 0;
tramp->fd_read = fd_read;