xen/pvcalls: fix unsigned less than zero error check

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The check on bedata->ref is never true because ref is an unsigned
integer. Fix this by assigning signed int ret to the return of the
call to gnttab_claim_grant_reference so the -ve return can be checked.

Detected by CoverityScan, CID#1460358 ("Unsigned compared against 0")

Fixes: 2196819099 ("xen/pvcalls: connect to the backend")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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Colin Ian King 2017-11-03 08:42:02 +00:00 • committed by Boris Ostrovsky

parent b5494ad83f

commit 95110ac88d

1 changed files with 3 additions and 4 deletions

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drivers/xen/pvcalls-front.c

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