From: Julia Lawall <julia@diku.dk>
Date: Mon, 27 Jul 2009 06:13:30 +0000 (+0000)
Subject: drivers/net: Correct redundant test
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=463889e27e6f4f097374a6c9de5611f520766dad;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

drivers/net: Correct redundant test

res has already been tested.  It seems that this test should be on the
recently returned value mmio.

A simplified version of the semantic match that finds this problem is as
follows: (http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
expression E;
@@

if (x == NULL || ...) { ... when forall
   return ...; }
... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
*x == NULL
|
*x != NULL
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index ceb6a9c357ad..4dbe5f173273 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -894,7 +894,7 @@ static int ethoc_probe(struct platform_device *pdev)
 
 	mmio = devm_request_mem_region(&pdev->dev, res->start,
 			res->end - res->start + 1, res->name);
-	if (!res) {
+	if (!mmio) {
 		dev_err(&pdev->dev, "cannot request I/O memory space\n");
 		ret = -ENXIO;
 		goto free;