i40e: re-use %*ph specifier to hexdump a data

Instead of using a custom approach change the code to use %*ph format
specifier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_common.c

@@ -331,25 +331,11 @@ void i40e_debug_aq(struct i40e_hw *hw, enum i40e_debug_mask mask, void *desc,
 			len = buf_len;
 		/* write the full 16-byte chunks */
 		for (i = 0; i < (len - 16); i += 16)
-			i40e_debug(hw, mask,
-				   "\t0x%04X  %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
-				   i, buf[i], buf[i + 1], buf[i + 2],
-				   buf[i + 3], buf[i + 4], buf[i + 5],
-				   buf[i + 6], buf[i + 7], buf[i + 8],
-				   buf[i + 9], buf[i + 10], buf[i + 11],
-				   buf[i + 12], buf[i + 13], buf[i + 14],
-				   buf[i + 15]);
+			i40e_debug(hw, mask, "\t0x%04X  %16ph\n", i, buf + i);
 		/* write whatever's left over without overrunning the buffer */
-		if (i < len) {
-			char d_buf[80];
-			int j = 0;
-
-			memset(d_buf, 0, sizeof(d_buf));
-			j += sprintf(d_buf, "\t0x%04X ", i);
-			while (i < len)
-				j += sprintf(&d_buf[j], " %02X", buf[i++]);
-			i40e_debug(hw, mask, "%s\n", d_buf);
-		}
+		if (i < len)
+			i40e_debug(hw, mask, "\t0x%04X  %*ph\n",
+					     i, len - i, buf + i);
 	}
 }
 

drivers/net/ethernet/intel/i40evf/i40e_common.c

@@ -331,25 +331,11 @@ void i40evf_debug_aq(struct i40e_hw *hw, enum i40e_debug_mask mask, void *desc,
 			len = buf_len;
 		/* write the full 16-byte chunks */
 		for (i = 0; i < (len - 16); i += 16)
-			i40e_debug(hw, mask,
-				   "\t0x%04X  %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
-				   i, buf[i], buf[i + 1], buf[i + 2],
-				   buf[i + 3], buf[i + 4], buf[i + 5],
-				   buf[i + 6], buf[i + 7], buf[i + 8],
-				   buf[i + 9], buf[i + 10], buf[i + 11],
-				   buf[i + 12], buf[i + 13], buf[i + 14],
-				   buf[i + 15]);
+			i40e_debug(hw, mask, "\t0x%04X  %16ph\n", i, buf + i);
 		/* write whatever's left over without overrunning the buffer */
-		if (i < len) {
-			char d_buf[80];
-			int j = 0;
-
-			memset(d_buf, 0, sizeof(d_buf));
-			j += sprintf(d_buf, "\t0x%04X ", i);
-			while (i < len)
-				j += sprintf(&d_buf[j], " %02X", buf[i++]);
-			i40e_debug(hw, mask, "%s\n", d_buf);
-		}
+		if (i < len)
+			i40e_debug(hw, mask, "\t0x%04X  %*ph\n",
+					     i, len - i, buf + i);
 	}
 }