From 1b8c1012142d83229b7d1c960d131e6a30f777a6 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 24 Feb 2017 11:30:03 +0100 Subject: drivers: net: xgene: Simplify xgene_enet_setup_mss() to kill warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With gcc-4.1.2 and -Os: drivers/net/ethernet/apm/xgene/xgene_enet_main.c: In function ‘xgene_enet_start_xmit’: drivers/net/ethernet/apm/xgene/xgene_enet_main.c:297: warning: ‘mss_index’ may be used uninitialized in this function Using a separate variable to track success may confuse the compiler. Preinitialize mss_index with -EBUSY and check for negative error values instead to kill the warning. Signed-off-by: Geert Uytterhoeven Signed-off-by: David S. Miller --- drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'drivers/net/ethernet/apm') diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index d0d0d12b531f..e536301acfde 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -293,36 +293,29 @@ static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, static int xgene_enet_setup_mss(struct net_device *ndev, u32 mss) { struct xgene_enet_pdata *pdata = netdev_priv(ndev); - bool mss_index_found = false; - int mss_index; + int mss_index = -EBUSY; int i; spin_lock(&pdata->mss_lock); /* Reuse the slot if MSS matches */ - for (i = 0; !mss_index_found && i < NUM_MSS_REG; i++) { + for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { if (pdata->mss[i] == mss) { pdata->mss_refcnt[i]++; mss_index = i; - mss_index_found = true; } } /* Overwrite the slot with ref_count = 0 */ - for (i = 0; !mss_index_found && i < NUM_MSS_REG; i++) { + for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { if (!pdata->mss_refcnt[i]) { pdata->mss_refcnt[i]++; pdata->mac_ops->set_mss(pdata, mss, i); pdata->mss[i] = mss; mss_index = i; - mss_index_found = true; } } - /* No slots with ref_count = 0 available, return busy */ - if (!mss_index_found) - mss_index = -EBUSY; - spin_unlock(&pdata->mss_lock); return mss_index; -- cgit v1.2.3