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>
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