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| author | Janusz Krzysztofik <jmkrzyszt@gmail.com> | 2018-11-08 00:30:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-17 11:28:48 +0300 |
| commit | 21ffeda14e83665ccd350005e3d51fdb0793d248 (patch) | |
| tree | ae320edb656243a015c72f1e995b1e386d1bb0d5 /arch | |
| parent | 5b2afd6261aeaf17da4953e07b731ca71bcabd17 (diff) | |
| download | linux-21ffeda14e83665ccd350005e3d51fdb0793d248.tar.xz | |
ARM: OMAP1: ams-delta: Fix possible use of uninitialized field
[ Upstream commit cec83ff1241ec98113a19385ea9e9cfa9aa4125b ]
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: aabf31737a6a ("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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap1/board-ams-delta.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c index 6cbc69c92913..4174fa86bfb1 100644 --- a/arch/arm/mach-omap1/board-ams-delta.c +++ b/arch/arm/mach-omap1/board-ams-delta.c @@ -512,6 +512,9 @@ static void modem_pm(struct uart_port *port, unsigned int state, unsigned old) struct modem_private_data *priv = port->private_data; int ret; + if (!priv) + return; + if (IS_ERR(priv->regulator)) return; |