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authorPaul Bolle <pebolle@tiscali.nl>2013-02-25 21:17:13 +0400
committerRoland Dreier <roland@purestorage.com>2013-02-25 21:17:13 +0400
commit57d88cffc83a2120266bbe9e72cbba5bd5f33675 (patch)
treec1ddd8533eb29f6f7eb25243edb5d448205696b9 /drivers/infiniband
parenta29bec12412d0e6f18ef1ce5f535e39829038648 (diff)
downloadlinux-57d88cffc83a2120266bbe9e72cbba5bd5f33675.tar.xz
IB/mlx4: Fix compiler warning about uninitialized 'vlan' variable
Building qp.o triggers this gcc warning: drivers/infiniband/hw/mlx4/qp.c: In function ‘mlx4_ib_post_send’: drivers/infiniband/hw/mlx4/qp.c:1862:62: warning: ‘vlan’ may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/infiniband/hw/mlx4/qp.c:1752:6: note: ‘vlan’ was declared here Looking at the code it is clear 'vlan' is only set and used if 'is_eth' is non-zero. But by initializing 'vlan' to 0xffff, on gcc (Ubuntu 4.7.2-22ubuntu1) 4.7.2 on x86-64 at least, we fix the warning, and the compiler was already setting 'vlan' to 0 in the generated code, so there's no real downside. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> [ Get rid of unnecessary move of 'is_vlan' initialization. - Roland ] Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index f8ac5333504d..ebadebe83b11 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1747,7 +1747,7 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
int spc;
int i;
int err = 0;
- u16 vlan;
+ u16 vlan = 0xffff;
bool is_eth;
bool is_vlan = false;
bool is_grh;