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input: qcom-hv-haptics: Fix a possible NULL pointer dereference

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Use Vmax from play effect in haptics_set_gain() only if the effect
is valid. Otherwise, use Vmax from the haptics configuration instead.

Change-Id: I7ec0f8c869096bccb26f7fda0057e3db3a51225d
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2020-06-12 15:42:07 -07:00
commit 49ed411fac
1 changed files with 5 additions and 1 deletions
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6
drivers/input/misc/qcom-hv-haptics.c
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@ -1761,6 +1761,7 @@ static int haptics_erase(struct input_dev *dev, int effect_id)
static void haptics_set_gain(struct input_dev *dev, u16 gain)
{
struct haptics_chip *chip = input_get_drvdata(dev);
struct haptics_hw_config *config = &chip->config;
struct haptics_play_info *play = &chip->play;
u32 vmax_mv;
@ -1770,7 +1771,10 @@ static void haptics_set_gain(struct input_dev *dev, u16 gain)
if (gain > 0x7fff)
gain = 0x7fff;
vmax_mv = play->effect->vmax_mv;
vmax_mv = config->vmax_mv;
if (play->effect)
vmax_mv = play->effect->vmax_mv;
if (chip->clamp_at_5v && (vmax_mv > CLAMPED_VMAX_MV))
vmax_mv = CLAMPED_VMAX_MV;