tree a29d2bee4b6726435e743819dc4ef4b04f32d652
parent 6929ef385e09c0065b87fda3e7b872a5070ac783
author Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 1480418018 +0100
committer Tejun Heo <tj@kernel.org> 1480437306 -0500

ata: sata_mv: check for errors when parsing nr-ports from dt

If the nr-ports property is missing ata_host_alloc_pinfo is called with
n_ports = 0. This results in host->ports[0] = NULL which later makes
mv_init_host() oops when dereferencing this pointer.

Instead be a bit more cooperative and fail the probing with an error
message.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>