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Input: synaptics-rmi4 - prevent null pointer dereference in f30

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If the platform data has f30_data.disable set, f30 in rmi_f30_config()
might be null. Prevent a kernel oops by checking for non-null f30.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Benjamin Tissoires 2017-03-10 10:10:54 -08:00 committed by Dmitry Torokhov
parent 45838660e3
commit b6573da139
1 changed files with 4 additions and 0 deletions
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4
drivers/input/rmi4/rmi_f30.c
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@ -170,6 +170,10 @@ static int rmi_f30_config(struct rmi_function *fn)
rmi_get_platform_data(fn->rmi_dev);
int error;
/* can happen if f30_data.disable is set */
if (!f30)
return 0;
if (pdata->f30_data.trackstick_buttons) {
/* Try [re-]establish link to F03. */
f30->f03 = rmi_find_function(fn->rmi_dev, 0x03);