Staging: comedi: addi-data: NULL dereference of amcc in v_pci_card_list_init()

amcc allocation may fail, prevent a NULL dereference.

allocation may fail, prevent a dereference.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/addi-data/addi_amcc_s5933.h

@@ -261,6 +261,9 @@ void v_pci_card_list_init(unsigned short pci_vendor, char display)
 			pci_vendor = i_ADDIDATADeviceID[i_Count];
 			if (pcidev->vendor == pci_vendor) {
 				amcc = kmalloc(sizeof(*amcc), GFP_KERNEL);
+				if (amcc == NULL)
+					continue;
+
 				memset(amcc, 0, sizeof(*amcc));
 
 				amcc->pcidev = pcidev;

drivers/staging/comedi/drivers/addi-data/amcc_s5933_58.h

@@ -254,6 +254,9 @@ void v_pci_card_list_init(unsigned short pci_vendor, char display)
 	pci_for_each_dev(pcidev) {
 		if (pcidev->vendor == pci_vendor) {
 			amcc = kmalloc(sizeof(*amcc), GFP_KERNEL);
+			if (amcc == NULL)
+				continue;
+
 			memset(amcc, 0, sizeof(*amcc));
 
 			amcc->pcidev = pcidev;