leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

memory: jz4780_nemc: Fix an error pointer vs NULL check in probe()

Browse Source 
The devm_ioremap() function returns NULL on error, it doesn't return
error pointers.  This bug could lead to an Oops during probe.

Fixes: f046e4a3f0 ("memory: jz4780_nemc: Only request IO memory the driver will use")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200803143607.GC346925@mwanda
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Dan Carpenter 2020-08-03 17:36:07 +03:00 committed by Krzysztof Kozlowski
parent 3650b228f8
commit 96999c797e
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/memory/jz4780-nemc.c
View File

@ -304,9 +304,9 @@ static int jz4780_nemc_probe(struct platform_device *pdev)
}
nemc->base = devm_ioremap(dev, res->start, NEMC_REG_LEN);
if (IS_ERR(nemc->base)) {
if (!nemc->base) {
dev_err(dev, "failed to get I/O memory\n");
return PTR_ERR(nemc->base);
return -ENOMEM;
}
writel(0, nemc->base + NEMC_NFCSR);