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hwmon: (core) Explain why at least two attribute groups are allocated

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A list of sysfs attribute groups is NULL-terminated, so we always need
to allocate data for at least two groups (the dynamically generated group
plus the NULL pointer). Add a comment to explain the situation.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2016-10-16 17:11:52 -07:00
parent 239552f495
commit b2a4cc3a06
1 changed files with 1 additions and 1 deletions
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drivers/hwmon/hwmon.c
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@ -561,7 +561,7 @@ __hwmon_device_register(struct device *dev, const char *name, void *drvdata,
if (chip) {
struct attribute **attrs;
int ngroups = 2;
int ngroups = 2; /* terminating NULL plus &hwdev->groups */
if (groups)
for (i = 0; groups[i]; i++)