ARM: OMAP1: ams-delta: Fix possible use of uninitialized field
[ Upstream commitcec83ff124
] While playing with initialization order of modem device, it has been discovered that under some circumstances (early console init, I believe) its .pm() callback may be called before the uart_port->private_data pointer is initialized from plat_serial8250_port->private_data, resulting in NULL pointer dereference. Fix it by checking for uninitialized pointer before using it in modem_pm(). Fixes:aabf31737a
("ARM: OMAP1: ams-delta: update the modem to use regulator API") Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -726,6 +726,9 @@ static void modem_pm(struct uart_port *port, unsigned int state, unsigned old)
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struct modem_private_data *priv = port->private_data;
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int ret;
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if (!priv)
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return;
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if (IS_ERR(priv->regulator))
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return;
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