diff --git a/drivers/net/ipa/ipa_cmd.c b/drivers/net/ipa/ipa_cmd.c
index bb3dfa9a2bc8..aa2b594ca506 100644
--- a/drivers/net/ipa/ipa_cmd.c
+++ b/drivers/net/ipa/ipa_cmd.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 
 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2019-2022 Linaro Ltd.
+ * Copyright (C) 2019-2023 Linaro Ltd.
  */
 
 #include <linux/types.h>
@@ -157,9 +157,14 @@ static void ipa_cmd_validate_build(void)
 	BUILD_BUG_ON(field_max(IP_FLTRT_FLAGS_HASH_ADDR_FMASK) !=
 		     field_max(IP_FLTRT_FLAGS_NHASH_ADDR_FMASK));
 
-	/* Valid endpoint numbers must fit in the IP packet init command */
-	BUILD_BUG_ON(field_max(IPA_PACKET_INIT_DEST_ENDPOINT_FMASK) <
-		     IPA_ENDPOINT_MAX - 1);
+	/* Prior to IPA v5.0, we supported no more than 32 endpoints,
+	 * and this was reflected in some 5-bit fields that held
+	 * endpoint numbers.  Starting with IPA v5.0, the widths of
+	 * these fields were extended to 8 bits, meaning up to 256
+	 * endpoints.  If the driver claims to support more than
+	 * that it's an error.
+	 */
+	BUILD_BUG_ON(IPA_ENDPOINT_MAX - 1 > U8_MAX);
 }
 
 /* Validate a memory region holding a table */
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index ce7f2d6e447e..8909ba8bfd0e 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 
 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2019-2022 Linaro Ltd.
+ * Copyright (C) 2019-2023 Linaro Ltd.
  */
 
 #include <linux/types.h>
@@ -1986,6 +1986,7 @@ int ipa_endpoint_config(struct ipa *ipa)
 	struct device *dev = &ipa->pdev->dev;
 	const struct ipa_reg *reg;
 	u32 endpoint_id;
+	u32 hw_limit;
 	u32 tx_count;
 	u32 rx_count;
 	u32 rx_base;
@@ -2031,6 +2032,14 @@ int ipa_endpoint_config(struct ipa *ipa)
 		return -EINVAL;
 	}
 
+	/* Until IPA v5.0, the max endpoint ID was 32 */
+	hw_limit = ipa->version < IPA_VERSION_5_0 ? 32 : U8_MAX + 1;
+	if (limit > hw_limit) {
+		dev_err(dev, "unexpected endpoint count, %u > %u\n",
+			limit, hw_limit);
+		return -EINVAL;
+	}
+
 	/* Allocate and initialize the available endpoint bitmap */
 	ipa->available = bitmap_zalloc(limit, GFP_KERNEL);
 	if (!ipa->available)
diff --git a/drivers/net/ipa/ipa_endpoint.h b/drivers/net/ipa/ipa_endpoint.h
index 4a5c3bc549df..3ad2e802040a 100644
--- a/drivers/net/ipa/ipa_endpoint.h
+++ b/drivers/net/ipa/ipa_endpoint.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2019-2022 Linaro Ltd.
+ * Copyright (C) 2019-2023 Linaro Ltd.
  */
 #ifndef _IPA_ENDPOINT_H_
 #define _IPA_ENDPOINT_H_
@@ -38,7 +38,7 @@ enum ipa_endpoint_name {
 	IPA_ENDPOINT_COUNT,	/* Number of names (not an index) */
 };
 
-#define IPA_ENDPOINT_MAX		32	/* Max supported by driver */
+#define IPA_ENDPOINT_MAX		36	/* Max supported by driver */
 
 /**
  * struct ipa_endpoint_tx - Endpoint configuration for TX endpoints