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xen/pt: Make xen_pt_unregister_device idempotent

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To deal with xen_host_pci_[set|get]_ functions returning error values
and clearing ourselves in the init function we should make the
.exit (xen_pt_unregister_device) function be idempotent in case
the generic code starts calling .exit (or for fun does it before
calling .init!).

Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2015-09-08 16:21:29 -04:00 • committed by Stefano Stabellini
parent fe2da64c5a
commit bce3394817
4 changed files with 22 additions and 6 deletions
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2
hw/xen/xen_pt.h
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@ -225,6 +225,7 @@ struct XenPCIPassthroughState {
MemoryListener memory_listener;
MemoryListener io_listener;
bool listener_set;
};
int xen_pt_config_init(XenPCIPassthroughState *s);
@ -290,6 +291,7 @@ static inline uint8_t xen_pt_pci_intx(XenPCIPassthroughState *s)
" value=%i, acceptable range is 1 - 4\n", r_val);
r_val = 0;
} else {
/* Note that if s.real_device.config_fd is closed we make 0xff. */
r_val -= 1;
}