generic-adc-battery: Fix forever loop in gab_remove()
There is a forever loop calling iio_channel_release() because the
"chan < " part of the "chan < ARRAY_SIZE()" is missing. This is in both
the error handling on probe and also in the remove function.
The other thing is that it's possible for some of the elements of the
adc_bat->channel[chan] array to be an ERR_PTR(). I've changed them to be
NULL instead. We're still not allowed to pass NULLs to
iio_channel_release() so I've added a check.
Finally, I removed an unused "chan = ARRAY_SIZE(gab_chan_name);" statement
as a small cleanup.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
diff --git a/drivers/power/generic-adc-battery.c b/drivers/power/generic-adc-battery.c
index 32ce17e..836816b 100644
--- a/drivers/power/generic-adc-battery.c
+++ b/drivers/power/generic-adc-battery.c
@@ -263,9 +263,6 @@
psy->external_power_changed = gab_ext_power_changed;
adc_bat->pdata = pdata;
- /* calculate the total number of channels */
- chan = ARRAY_SIZE(gab_chan_name);
-
/*
* copying the static properties and allocating extra memory for holding
* the extra configurable properties received from platform data.
@@ -291,6 +288,7 @@
gab_chan_name[chan]);
if (IS_ERR(adc_bat->channel[chan])) {
ret = PTR_ERR(adc_bat->channel[chan]);
+ adc_bat->channel[chan] = NULL;
} else {
/* copying properties for supported channels only */
memcpy(properties + sizeof(*(psy->properties)) * index,
@@ -344,8 +342,10 @@
gpio_req_fail:
power_supply_unregister(psy);
err_reg_fail:
- for (chan = 0; ARRAY_SIZE(gab_chan_name); chan++)
- iio_channel_release(adc_bat->channel[chan]);
+ for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
+ if (adc_bat->channel[chan])
+ iio_channel_release(adc_bat->channel[chan]);
+ }
second_mem_fail:
kfree(psy->properties);
first_mem_fail:
@@ -365,8 +365,10 @@
gpio_free(pdata->gpio_charge_finished);
}
- for (chan = 0; ARRAY_SIZE(gab_chan_name); chan++)
- iio_channel_release(adc_bat->channel[chan]);
+ for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
+ if (adc_bat->channel[chan])
+ iio_channel_release(adc_bat->channel[chan]);
+ }
kfree(adc_bat->psy.properties);
cancel_delayed_work(&adc_bat->bat_work);