linux-kernel - [PATCH net v2] octeon_ep: explicitly test for firmware ready value

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Message-ID: <20231207074936.2597889-1-srasheed@marvell.com>
Date:   Wed, 6 Dec 2023 23:49:36 -0800
From:   Shinas Rasheed <srasheed@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <hgani@...vell.com>, <vimleshk@...vell.com>, <egallen@...hat.com>,
        <mschmidt@...hat.com>, <pabeni@...hat.com>, <horms@...nel.org>,
        <kuba@...nel.org>, <davem@...emloft.net>, <wizhao@...hat.com>,
        <konguyen@...hat.com>, Shinas Rasheed <srasheed@...vell.com>,
        "Veerasenareddy Burru" <vburru@...vell.com>,
        Sathesh Edara <sedara@...vell.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Abhijit Ayarekar <aayarekar@...vell.com>,
        "Satananda Burla" <sburla@...vell.com>
Subject: [PATCH net v2] octeon_ep: explicitly test for firmware ready value

The firmware ready value is 1, and get firmware ready status
function should explicitly test for that value. The firmware
ready value read will be 2 after driver load, and on unbind
till firmware rewrites the firmware ready back to 0, the value
seen by driver will be 2, which should be regarded as not ready.

Fixes: 10c073e40469 ("octeon_ep: defer probe if firmware not ready")
Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
V2:
  - Fixed redundant logic

V1: https://lore.kernel.org/all/20231206063549.2590305-1-srasheed@marvell.com/

 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 552970c7dec0..b8ae269f6f97 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -1258,7 +1258,8 @@ static bool get_fw_ready_status(struct pci_dev *pdev)
 
 		pci_read_config_byte(pdev, (pos + 8), &status);
 		dev_info(&pdev->dev, "Firmware ready status = %u\n", status);
-		return status;
+#define FW_STATUS_READY 1ULL
+		return (status == FW_STATUS_READY);
 	}
 	return false;
 }
-- 
2.25.1