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path: root/drivers/auxdisplay/charlcd.c
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Diffstat (limited to 'drivers/auxdisplay/charlcd.c')
-rw-r--r--drivers/auxdisplay/charlcd.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c
index 304accde365c..6d309e4971b6 100644
--- a/drivers/auxdisplay/charlcd.c
+++ b/drivers/auxdisplay/charlcd.c
@@ -37,7 +37,7 @@ struct charlcd_priv {
bool must_clear;
/* contains the LCD config state */
- unsigned long int flags;
+ unsigned long flags;
/* Current escape sequence and it's length or -1 if outside */
struct {
@@ -578,6 +578,9 @@ static int charlcd_init(struct charlcd *lcd)
* Since charlcd_init_display() needs to write data, we have to
* enable mark the LCD initialized just before.
*/
+ if (WARN_ON(!lcd->ops->init_display))
+ return -EINVAL;
+
ret = lcd->ops->init_display(lcd);
if (ret)
return ret;