1 files changed, 41 insertions, 28 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index 1b493854f522..d7e24d661724 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -1,11 +1,14 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright(c) 2013 - 2021 Intel Corporation. */
 
-#include "i40e.h"
-#include "i40e_type.h"
-#include "i40e_adminq.h"
-#include "i40e_prototype.h"
 #include <linux/avf/virtchnl.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/pci.h>
+#include "i40e_adminq_cmd.h"
+#include "i40e_devids.h"
+#include "i40e_prototype.h"
+#include "i40e_register.h"
 
 /**
  * i40e_set_mac_type - Sets MAC type
@@ -818,62 +821,72 @@ void i40e_pre_tx_queue_cfg(struct i40e_hw *hw, u32 queue, bool enable)
 }
 
 /**
- *  i40e_read_pba_string - Reads part number string from EEPROM
+ *  i40e_get_pba_string - Reads part number string from EEPROM
  *  @hw: pointer to hardware structure
- *  @pba_num: stores the part number string from the EEPROM
- *  @pba_num_size: part number string buffer length
  *
- *  Reads the part number string from the EEPROM.
+ *  Reads the part number string from the EEPROM and stores it
+ *  into newly allocated buffer and saves resulting pointer
+ *  to i40e_hw->pba_id field.
  **/
-int i40e_read_pba_string(struct i40e_hw *hw, u8 *pba_num,
-			 u32 pba_num_size)
+void i40e_get_pba_string(struct i40e_hw *hw)
 {
+#define I40E_NVM_PBA_FLAGS_BLK_PRESENT	0xFAFA
 	u16 pba_word = 0;
 	u16 pba_size = 0;
 	u16 pba_ptr = 0;
-	int status = 0;
-	u16 i = 0;
+	int status;
+	char *ptr;
+	u16 i;
 
 	status = i40e_read_nvm_word(hw, I40E_SR_PBA_FLAGS, &pba_word);
-	if (status || (pba_word != 0xFAFA)) {
-		hw_dbg(hw, "Failed to read PBA flags or flag is invalid.\n");
-		return status;
+	if (status) {
+		hw_dbg(hw, "Failed to read PBA flags.\n");
+		return;
+	}
+	if (pba_word != I40E_NVM_PBA_FLAGS_BLK_PRESENT) {
+		hw_dbg(hw, "PBA block is not present.\n");
+		return;
 	}
 
 	status = i40e_read_nvm_word(hw, I40E_SR_PBA_BLOCK_PTR, &pba_ptr);
 	if (status) {
 		hw_dbg(hw, "Failed to read PBA Block pointer.\n");
-		return status;
+		return;
 	}
 
 	status = i40e_read_nvm_word(hw, pba_ptr, &pba_size);
 	if (status) {
 		hw_dbg(hw, "Failed to read PBA Block size.\n");
-		return status;
+		return;
 	}
 
 	/* Subtract one to get PBA word count (PBA Size word is included in
-	 * total size)
+	 * total size) and advance pointer to first PBA word.
 	 */
 	pba_size--;
-	if (pba_num_size < (((u32)pba_size * 2) + 1)) {
-		hw_dbg(hw, "Buffer too small for PBA data.\n");
-		return -EINVAL;
+	pba_ptr++;
+	if (!pba_size) {
+		hw_dbg(hw, "PBA ID is empty.\n");
+		return;
 	}
 
+	ptr = devm_kzalloc(i40e_hw_to_dev(hw), pba_size * 2 + 1, GFP_KERNEL);
+	if (!ptr)
+		return;
+	hw->pba_id = ptr;
+
 	for (i = 0; i < pba_size; i++) {
-		status = i40e_read_nvm_word(hw, (pba_ptr + 1) + i, &pba_word);
+		status = i40e_read_nvm_word(hw, pba_ptr + i, &pba_word);
 		if (status) {
 			hw_dbg(hw, "Failed to read PBA Block word %d.\n", i);
-			return status;
+			devm_kfree(i40e_hw_to_dev(hw), hw->pba_id);
+			hw->pba_id = NULL;
+			return;
 		}
 
-		pba_num[(i * 2)] = (pba_word >> 8) & 0xFF;
-		pba_num[(i * 2) + 1] = pba_word & 0xFF;
+		*ptr++ = (pba_word >> 8) & 0xFF;
+		*ptr++ = pba_word & 0xFF;
 	}
-	pba_num[(pba_size * 2)] = '\0';
-
-	return status;
 }
 
 /**