From: Dan Carpenter dan.carpenter@oracle.com
commit 96999c797ec1ef41259f00b4ddf9cf33b342cb78 upstream.
The devm_ioremap() function returns NULL on error, it doesn't return error pointers. This bug could lead to an Oops during probe.
Fixes: f046e4a3f0b9 ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/memory/jz4780-nemc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/memory/jz4780-nemc.c +++ b/drivers/memory/jz4780-nemc.c @@ -306,9 +306,9 @@ static int jz4780_nemc_probe(struct plat }
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);