[ Upstream commit
fbed20280d912449cfb40c382cb55e3d11502587 ]
There is a potential execution path in which function
of_find_compatible_node() returns NULL. In such a case,
we end up having a NULL pointer dereference when accessing
pointer *nfc_np* in function of_clk_get().
So, we better don't take any chances and fix this by null
checking pointer *nfc_np* before calling of_clk_get().
Addresses-Coverity-ID:
1473052 ("Dereference null return value")
Fixes:
f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
nand_np = dev->of_node;
nfc_np = of_find_compatible_node(dev->of_node, NULL,
"atmel,sama5d3-nfc");
+ if (!nfc_np) {
+ dev_err(dev, "Could not find device node for sama5d3-nfc\n");
+ return -ENODEV;
+ }
nc->clk = of_clk_get(nfc_np, 0);
if (IS_ERR(nc->clk)) {