[PATCH v2 iwl-next] ice: Fix some null pointer dereference issues in ice_ptp.c

[Kunwu Chan]

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: d938a8cca88a ("ice: Auxbus devices & driver for E822 TS")
Cc: Kunwu Chan <kunwu.chan@xxxxxxxxxxx>
Suggested-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
---
 drivers/net/ethernet/intel/ice/ice_ptp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index e9e59f4b5580..848e3e063e64 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -2743,6 +2743,8 @@ static int ice_ptp_register_auxbus_driver(struct ice_pf *pf)
 	name = devm_kasprintf(dev, GFP_KERNEL, "ptp_aux_dev_%u_%u_clk%u",
 			      pf->pdev->bus->number, PCI_SLOT(pf->pdev->devfn),
 			      ice_get_ptp_src_clock_index(&pf->hw));
+	if (!name)
+		return -ENOMEM;
 
 	aux_driver->name = name;
 	aux_driver->shutdown = ice_ptp_auxbus_shutdown;
@@ -2989,6 +2991,8 @@ static int ice_ptp_create_auxbus_device(struct ice_pf *pf)
 	name = devm_kasprintf(dev, GFP_KERNEL, "ptp_aux_dev_%u_%u_clk%u",
 			      pf->pdev->bus->number, PCI_SLOT(pf->pdev->devfn),
 			      ice_get_ptp_src_clock_index(&pf->hw));
+	if (!name)
+		return -ENOMEM;
 
 	aux_dev->name = name;
 	aux_dev->id = id;
-- 
2.39.2