From f86911e2de129fb3c8ca402c251138d12c4a9d37 Mon Sep 17 00:00:00 2001 From: Paul Durrant Date: Wed, 18 May 2016 08:53:01 +0100 Subject: [PATCH] xen-netback: correct length checks on hash copy_ops The length checks on the grant table copy_ops for setting hash key and hash mapping are checking the local 'len' value which is correct in the case of the former but not the latter. This was picked up by static analysis checks. This patch replaces checks of 'len' with 'copy_op.len' in both cases to correct the incorrect check, keep the two checks consistent, and to make it clear what the checks are for. Signed-off-by: Paul Durrant Reported-by: Dan Carpenter Cc: Wei Liu Acked-by: Wei Liu Signed-off-by: David S. Miller --- drivers/net/xen-netback/hash.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c index 392e3929ae84..fb87cb39a56b 100644 --- a/drivers/net/xen-netback/hash.c +++ b/drivers/net/xen-netback/hash.c @@ -311,7 +311,7 @@ u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len) if (len > XEN_NETBK_MAX_HASH_KEY_SIZE) return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; - if (len != 0) { + if (copy_op.len != 0) { gnttab_batch_copy(©_op, 1); if (copy_op.status != GNTST_okay) @@ -359,7 +359,7 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len, if (mapping[off++] >= vif->num_queues) return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; - if (len != 0) { + if (copy_op.len != 0) { gnttab_batch_copy(©_op, 1); if (copy_op.status != GNTST_okay) -- 2.34.1