From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

The device pointer cannot be NULL in acpi_pcc_hotkey_add() and
acpi_pcc_hotkey_remove() because these functions are ACPI driver
callbacks and NULL is never passed to any of them as an argument.

Likewise, acpi_pcc_hotkey_resume() is a resume callback of a
device driver and NULL is never passed to it as an argument, so
the dev pointer in it cannot be NULL.

Moreover, since acpi_pcc_hotkey_remove() and acpi_pcc_hotkey_resume()
can only run after acpi_pcc_hotkey_add() has completed successfully,
the acpi_driver_data() of the device object used by them cannot be
NULL when they run.

Drop all of the redundant NULL checks of the pointers mentioned above.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v1 -> v4: No changes

---
 drivers/platform/x86/panasonic-laptop.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index 56b4e61d7e5c..188ec597a14e 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -965,14 +965,7 @@ static int acpi_pcc_init_input(struct pcc_acpi *pcc)
 #ifdef CONFIG_PM_SLEEP
 static int acpi_pcc_hotkey_resume(struct device *dev)
 {
-	struct pcc_acpi *pcc;
-
-	if (!dev)
-		return -EINVAL;
-
-	pcc = acpi_driver_data(to_acpi_device(dev));
-	if (!pcc)
-		return -EINVAL;
+	struct pcc_acpi *pcc = acpi_driver_data(to_acpi_device(dev));
 
 	if (pcc->num_sifr > SINF_MUTE)
 		acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
@@ -994,9 +987,6 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device)
 	struct pcc_acpi *pcc;
 	int num_sifr, result;
 
-	if (!device)
-		return -EINVAL;
-
 	num_sifr = acpi_pcc_get_sqty(device);
 
 	/*
@@ -1121,9 +1111,6 @@ static void acpi_pcc_hotkey_remove(struct acpi_device *device)
 {
 	struct pcc_acpi *pcc = acpi_driver_data(device);
 
-	if (!device || !pcc)
-		return;
-
 	i8042_remove_filter(panasonic_i8042_filter);
 
 	if (pcc->platform) {
-- 
2.51.0