From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1ef47c-00038H-Jj for barebox@lists.infradead.org; Fri, 26 Jan 2018 13:32:52 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.89) (envelope-from ) id 1ef47M-0005M4-Ic for barebox@lists.infradead.org; Fri, 26 Jan 2018 14:32:32 +0100 From: Lucas Stach Date: Fri, 26 Jan 2018 14:32:30 +0100 Message-Id: <20180126133232.4992-3-l.stach@pengutronix.de> In-Reply-To: <20180126133232.4992-1-l.stach@pengutronix.de> References: <20180126133232.4992-1-l.stach@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v3 3/5] net/e1000: EEPROM isn't valid if only iNVM is available To: barebox@lists.infradead.org There is no point in registering the emulated EEPROM device if only the iNVM is available with no external flash attached to the i210, as in practice it's only shadowing the iNVM. When the EEPROM is populated from iNVM, the signature is not valid, which causes other parts of the driver to fall over. To fix this just ignore the EEPROM in that case. Signed-off-by: Lucas Stach --- drivers/net/e1000/eeprom.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/net/e1000/eeprom.c b/drivers/net/e1000/eeprom.c index ddac7de8a0e9..0a28dfdd8868 100644 --- a/drivers/net/e1000/eeprom.c +++ b/drivers/net/e1000/eeprom.c @@ -1525,20 +1525,18 @@ int e1000_register_invm(struct e1000_hw *hw) int e1000_eeprom_valid(struct e1000_hw *hw) { - uint32_t eecd; + uint32_t valid_mask = E1000_EECD_FLASH_IN_USE | + E1000_EECD_AUTO_RD | E1000_EECD_EE_PRES; if (hw->mac_type != e1000_igb) return 1; /* - * if AUTO_RD or EE_PRES are not set in EECD, the shadow RAM is invalid - * (and in practise seems to contain the contents of iNVM). + * If there is no flash in use or AUTO_RD or EE_PRES are not set in + * EECD, the shadow RAM is invalid (and in practise seems to contain + * the contents of iNVM). */ - eecd = e1000_read_reg(hw, E1000_EECD); - if (!(eecd & E1000_EECD_AUTO_RD)) - return 0; - - if (!(eecd & E1000_EECD_EE_PRES)) + if ((e1000_read_reg(hw, E1000_EECD) & valid_mask) != valid_mask) return 0; return 1; -- 2.15.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox