From 691299201b1416e823bbada0df316c6408167aa7 Mon Sep 17 00:00:00 2001 From: Peter Senna Tschudin Date: Fri, 5 Oct 2012 12:10:52 +0000 Subject: [PATCH] drivers/net/ethernet/amd/au1000_eth.c: fix error return code The function au1000_probe() return 0 for success and negative value for most of its internal tests failures. There are exceptions that are error cases going to err_out:. For this cases, the function abort its success execution path, but returns non negative value, making it dificult for a caller function to notice the error. This patch fixes the error cases that do not return negative values. This was found by Coccinelle, but the code change was made by hand. This patch is not robot generated. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // Signed-off-by: Peter Senna Tschudin Signed-off-by: David S. Miller --- drivers/net/ethernet/amd/au1000_eth.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c index 397596b078d9..f195acfa2df7 100644 --- a/drivers/net/ethernet/amd/au1000_eth.c +++ b/drivers/net/ethernet/amd/au1000_eth.c @@ -1174,8 +1174,10 @@ static int __devinit au1000_probe(struct platform_device *pdev) snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", pdev->name, aup->mac_id); aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); - if (aup->mii_bus->irq == NULL) + if (aup->mii_bus->irq == NULL) { + err = -ENOMEM; goto err_out; + } for (i = 0; i < PHY_MAX_ADDR; ++i) aup->mii_bus->irq[i] = PHY_POLL; @@ -1190,7 +1192,8 @@ static int __devinit au1000_probe(struct platform_device *pdev) goto err_mdiobus_reg; } - if (au1000_mii_probe(dev) != 0) + err = au1000_mii_probe(dev); + if (err != 0) goto err_out; pDBfree = NULL; @@ -1205,6 +1208,7 @@ static int __devinit au1000_probe(struct platform_device *pdev) } aup->pDBfree = pDBfree; + err = -ENODEV; for (i = 0; i < NUM_RX_DMA; i++) { pDB = au1000_GetFreeDB(aup); if (!pDB) @@ -1213,6 +1217,8 @@ static int __devinit au1000_probe(struct platform_device *pdev) aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; aup->rx_db_inuse[i] = pDB; } + + err = -ENODEV; for (i = 0; i < NUM_TX_DMA; i++) { pDB = au1000_GetFreeDB(aup); if (!pDB) -- 2.20.1