net: e1000: do not attempt to set hwaddr for i210 without FLASH

commit f1bcad22dd19 ("net: e1000: add support for writing to EEPROM")
adds support for storing hwaddr in EEPROM however i210 devices do not
support this and thus results in errors such as:
Warning: e1000#0 failed to set MAC address'

Check if a flash device is present and if not return -ENOSYS indicating
this is not supported.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index 694114e..60613b7 100644 (file)
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -5673,6 +5673,10 @@ static int e1000_write_hwaddr(struct eth_device *dev)
 
        DEBUGOUT("%s: mac=%pM\n", __func__, mac);
 
+       if ((hw->eeprom.type == e1000_eeprom_invm) &&
+           !(E1000_READ_REG(hw, EECD) & E1000_EECD_FLASH_DETECTED_I210))
+               return -ENOSYS;
+
        memset(current_mac, 0, 6);
 
        /* Read from EEPROM, not from registers, to make sure

diff --git a/drivers/net/e1000.h b/drivers/net/e1000.h
index 072851b..082154a 100644 (file)
--- a/drivers/net/e1000.h
+++ b/drivers/net/e1000.h
@@ -1245,6 +1245,7 @@ struct e1000_hw {
 #define E1000_EECD_FLUPD     0x00080000 /* Update FLASH */
 #define E1000_EECD_FLUPD_I210       0x00800000 /* Update FLASH */
 #define E1000_EECD_FLUDONE_I210     0x04000000 /* Update FLASH done*/
+#define E1000_EECD_FLASH_DETECTED_I210 0x00080000 /* FLASH detected */
 #define E1000_FLUDONE_ATTEMPTS      20000
 #define E1000_EECD_AUPDEN    0x00100000 /* Enable Autonomous FLASH update */
 #define E1000_EECD_SHADV     0x00200000 /* Shadow RAM Data Valid */