xen/xenbus: Correct the comments for xenbus_grant_ring()
A grant reference (which is a positive number) can indicate success, so the original comments need be improved. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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@ -361,8 +361,8 @@ static void xenbus_switch_fatal(struct xenbus_device *dev, int depth, int err,
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* @ring_mfn: mfn of ring to grant
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* Grant access to the given @ring_mfn to the peer of the given device. Return
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* 0 on success, or -errno on error. On error, the device will switch to
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* XenbusStateClosing, and the error will be saved in the store.
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* a grant reference on success, or -errno on error. On error, the device will
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* switch to XenbusStateClosing, and the error will be saved in the store.
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*/
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int xenbus_grant_ring(struct xenbus_device *dev, unsigned long ring_mfn)
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{
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