linux-kernel - [PATCH] net/qed: allow old cards not supporting "num

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Message-ID: <20241121172821.24003-1-louis.leseur@gmail.com>
Date: Thu, 21 Nov 2024 18:26:22 +0100
From: Louis Leseur <louis.leseur@...il.com>
To: Manish Chopra <manishc@...vell.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Louis Leseur <louis.leseur@...il.com>,
	Florian Forestier <florian@...estier.re>
Subject: [PATCH] net/qed: allow old cards not supporting "num_images" to work

Commit 43645ce03e0063d7c4a5001215ca815188778881 added support for
populating flash image attributes, notably "num_images". However, some
cards were not able to return this information. In such cases, the
driver would return EINVAL, causing the driver to exit.

We added a check to return EOPNOTSUPP when the card is not able to
return these information, allowing the driver continue instead of
returning an error.

Co-developed-by: Florian Forestier <florian@...estier.re>
Signed-off-by: Florian Forestier <florian@...estier.re>
Signed-off-by: Louis Leseur <louis.leseur@...il.com>
---
 drivers/net/ethernet/qlogic/qed/qed_mcp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index 16e6bd466143..6218d9c26855 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -3314,7 +3314,9 @@ int qed_mcp_bist_nvm_get_num_images(struct qed_hwfn *p_hwfn,
 	if (rc)
 		return rc;
 
-	if (((rsp & FW_MSG_CODE_MASK) != FW_MSG_CODE_OK))
+	if (((rsp & FW_MSG_CODE_MASK) == FW_MSG_CODE_UNSUPPORTED))
+		rc = -EOPNOTSUPP;
+	else if (((rsp & FW_MSG_CODE_MASK) != FW_MSG_CODE_OK))
 		rc = -EINVAL;
 
 	return rc;
-- 
2.45.2