4.9-stable review patch. If anyone has any objections, please let me know.
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From: Nicholas Mc Guire hofrat@osadl.org
[ Upstream commit b5c1a23b17e563b656cc9bb76ce5323b997d90e8 ]
of_iomap() can return NULL so that return needs to be checked and NULL treated as failure. While at it also take care of the missing of_node_put() in the error path.
Signed-off-by: Nicholas Mc Guire hofrat@osadl.org Fixes: commit afa17a500a36 ("net/can: add driver for mscan family & mpc52xx_mscan") Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/can/mscan/mpc5xxx_can.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/net/can/mscan/mpc5xxx_can.c +++ b/drivers/net/can/mscan/mpc5xxx_can.c @@ -86,6 +86,11 @@ static u32 mpc52xx_can_get_clock(struct return 0; } cdm = of_iomap(np_cdm, 0); + if (!cdm) { + of_node_put(np_cdm); + dev_err(&ofdev->dev, "can't map clock node!\n"); + return 0; + }
if (in_8(&cdm->ipb_clk_sel) & 0x1) freq *= 2;