This diff correctly identifies my new samsung nvme:

nvme0 at pci5 dev 0 function 0 "Samsung PM9C1 NVMe" rev 0x00: msix, NVMe 2.0
nvme0: Samsung SSD 990 PRO 4TB, firmware 0B2QJXG7, serial

bmercer@

diff --git a/sys/dev/pci/pcidevs b/sys/dev/pci/pcidevs
index 347d991b1d7..4680fecbf24 100644
--- a/sys/dev/pci/pcidevs
+++ b/sys/dev/pci/pcidevs
@@ -8954,6 +8954,7 @@ product SAMSUNG2 SM981_NVME	0xa808	SM981/PM981 NVMe
 product SAMSUNG2 PM991_NVME	0xa809	PM991 NVMe
 product SAMSUNG2 PM9A1_NVME	0xa80a	PM9A1 NVMe
 product SAMSUNG2 PM9B1_NVME	0xa80b	PM9B1 NVMe
+product SAMSUNG2 PM9C1_NVME	0xa80c	PM9C1 NVMe
 product SAMSUNG2 NVME_171X	0xa820	NVMe
 product SAMSUNG2 NVME_172X	0xa821	NVMe
 product SAMSUNG2 NVME_172X_A_B	0xa822	NVMe
diff --git a/sys/dev/pci/pcidevs.h b/sys/dev/pci/pcidevs.h
index ed995979724..848df15d582 100644
--- a/sys/dev/pci/pcidevs.h
+++ b/sys/dev/pci/pcidevs.h
@@ -8959,6 +8959,7 @@
 #define	PCI_PRODUCT_SAMSUNG2_PM991_NVME	0xa809		/* PM991 NVMe */
 #define	PCI_PRODUCT_SAMSUNG2_PM9A1_NVME	0xa80a		/* PM9A1 NVMe */
 #define	PCI_PRODUCT_SAMSUNG2_PM9B1_NVME	0xa80b		/* PM9B1 NVMe */
+#define	PCI_PRODUCT_SAMSUNG2_PM9C1_NVME	0xa80c		/* PM9C1 NVMe */
 #define	PCI_PRODUCT_SAMSUNG2_NVME_171X	0xa820		/* NVMe */
 #define	PCI_PRODUCT_SAMSUNG2_NVME_172X	0xa821		/* NVMe */
 #define	PCI_PRODUCT_SAMSUNG2_NVME_172X_A_B	0xa822		/* NVMe */
diff --git a/sys/dev/pci/pcidevs_data.h b/sys/dev/pci/pcidevs_data.h
index 949681c4507..edfbc74c222 100644
--- a/sys/dev/pci/pcidevs_data.h
+++ b/sys/dev/pci/pcidevs_data.h
@@ -32299,6 +32299,10 @@ static const struct pci_known_product pci_known_products[] = {
 	    PCI_VENDOR_SAMSUNG2, PCI_PRODUCT_SAMSUNG2_PM9B1_NVME,
 	    "PM9B1 NVMe",
 	},
+	{
+	    PCI_VENDOR_SAMSUNG2, PCI_PRODUCT_SAMSUNG2_PM9C1_NVME,
+	    "PM9C1 NVMe",
+	},
 	{
 	    PCI_VENDOR_SAMSUNG2, PCI_PRODUCT_SAMSUNG2_NVME_171X,
 	    "NVMe",