diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 3b1277a8bd61..99cc41135473 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -1640,6 +1640,15 @@ struct brcmf_random_seed_footer {
 #define BRCMF_RANDOM_SEED_MAGIC		0xfeedc0de
 #define BRCMF_RANDOM_SEED_LENGTH	0x100
 
+static noinline_for_stack void
+brcmf_pcie_provide_random_bytes(struct brcmf_pciedev_info *devinfo, u32 address)
+{
+	u8 randbuf[BRCMF_RANDOM_SEED_LENGTH];
+
+	get_random_bytes(randbuf, BRCMF_RANDOM_SEED_LENGTH);
+	memcpy_toio(devinfo->tcm + address, randbuf, BRCMF_RANDOM_SEED_LENGTH);
+}
+
 static int brcmf_pcie_download_fw_nvram(struct brcmf_pciedev_info *devinfo,
 					const struct firmware *fw, void *nvram,
 					u32 nvram_len)
@@ -1682,7 +1691,6 @@ static int brcmf_pcie_download_fw_nvram(struct brcmf_pciedev_info *devinfo,
 				.length = cpu_to_le32(rand_len),
 				.magic = cpu_to_le32(BRCMF_RANDOM_SEED_MAGIC),
 			};
-			void *randbuf;
 
 			/* Some Apple chips/firmwares expect a buffer of random
 			 * data to be present before NVRAM
@@ -1694,10 +1702,7 @@ static int brcmf_pcie_download_fw_nvram(struct brcmf_pciedev_info *devinfo,
 				    sizeof(footer));
 
 			address -= rand_len;
-			randbuf = kzalloc(rand_len, GFP_KERNEL);
-			get_random_bytes(randbuf, rand_len);
-			memcpy_toio(devinfo->tcm + address, randbuf, rand_len);
-			kfree(randbuf);
+			brcmf_pcie_provide_random_bytes(devinfo, address);
 		}
 	} else {
 		brcmf_dbg(PCIE, "No matching NVRAM file found %s\n",