xen/xenbus: let xenbus_map_ring_valloc() return errno values only

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Today xenbus_map_ring_valloc() can return either a negative errno
value (-ENOMEM or -EINVAL) or a grant status value. This is a mess as
e.g -ENOMEM and GNTST_eagain have the same numeric value.

Fix that by turning all grant mapping errors into -ENOENT. This is
no problem as all callers of xenbus_map_ring_valloc() only use the
return value to print an error message, and in case of mapping errors
the grant status value has already been printed by __xenbus_map_ring()
before.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20200701121638.19840-3-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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Juergen Gross 2020-07-01 14:16:38 +02:00 • committed by Boris Ostrovsky

parent 3848e4e0a3

commit 578c1bb905

1 changed files with 6 additions and 16 deletions

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drivers/xen/xenbus/xenbus_client.c

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