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octeontx2-af: Fix uninitialized variable in debugfs

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If rvu_get_blkaddr() fails, then this rvu_cgx_nix_cuml_stats() returns
zero and we write some uninitialized data into the debugfs output.

On the error paths, the use of the uninitialized "*stat" is harmless,
but it will lead to a Smatch warning (static analysis) and a UBSan
warning (runtime analysis) so we should prevent that as well.

Fixes: f967488d095e ("octeontx2-af: Add per CGX port level NIX Rx/Tx counters")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2019-11-21 12:21:46 +03:00 committed by David S. Miller
parent 039fcccaed
commit 0617aa988d
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
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@ -608,6 +608,8 @@ int rvu_cgx_nix_cuml_stats(struct rvu *rvu, void *cgxd, int lmac_id,
u16 pcifunc;
int pf, lf;
*stat = 0;
if (!cgxd || !rvu)
return -EINVAL;
@ -624,7 +626,6 @@ int rvu_cgx_nix_cuml_stats(struct rvu *rvu, void *cgxd, int lmac_id,
return 0;
block = &rvu->hw->block[blkaddr];
*stat = 0;
for (lf = 0; lf < block->lf.max; lf++) {
/* Check if a lf is attached to this PF or one of its VFs */
if (!((block->fn_map[lf] & ~RVU_PFVF_FUNC_MASK) == (pcifunc &