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power: supply: bq2415x: check for NULL acpi_id to avoid null pointer dereference 

acpi_match_device can potentially return NULL, so it is prudent to
check if acpi_id is null before it is dereferenced.  Add a check
and an error message to indicate the failure.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Colin Ian King 2017-01-20 13:25:06 +00:00 committed by Sebastian Reichel
parent cb190af290
commit a1b94355ea
1 changed files with 5 additions and 0 deletions
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5
drivers/power/supply/bq2415x_charger.c
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@ -1569,6 +1569,11 @@ static int bq2415x_probe(struct i2c_client *client,
acpi_id = acpi_id =
acpi_match_device(client->dev.driver->acpi_match_table, acpi_match_device(client->dev.driver->acpi_match_table,
&client->dev); &client->dev);
if (!acpi_id) {
dev_err(&client->dev, "failed to match device name\n");
ret = -ENODEV;
goto error_1;
}
name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num); name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
} }
if (!name) { if (!name) {