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mfd: wm97xx-core: Platform data can be NULL 

It is not mandatory that platform data is passed along the ac97
codec. Actually there are configuration without a battery connected to
the ADC of the codec.

This is for example the case for the PXA zylonite platform, so fix the
NULL dereferencing by adding a test.

Fixes: a5c6951c49 ("mfd: wm97xx-core: core support for wm97xx Codec")
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Robert Jarzmik 2018-06-03 22:16:17 +02:00 committed by Lee Jones
parent df7c3bf24f
commit 46f107d0cb
1 changed files with 1 additions and 1 deletions
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2
drivers/mfd/wm97xx-core.c
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@ -278,7 +278,7 @@ static int wm97xx_ac97_probe(struct ac97_codec_device *adev)
codec_pdata = &wm97xx->codec_pdata;
codec_pdata->ac97 = wm97xx->ac97;
codec_pdata->batt_pdata = pdata->batt_pdata;
codec_pdata->batt_pdata = pdata ? pdata->batt_pdata : NULL;
switch (adev->vendor_id) {
case WM9705_VENDOR_ID: