linux-kernel - [PATCH 5.15 092/136] ionic: fix up issues with handling EAGAIN on FW cmds

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220829105808.442105569@linuxfoundation.org>
Date:   Mon, 29 Aug 2022 12:59:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Shannon Nelson <snelson@...sando.io>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 092/136] ionic: fix up issues with handling EAGAIN on FW cmds

From: Shannon Nelson <snelson@...sando.io>

[ Upstream commit 0fc4dd452d6c14828eed6369155c75c0ac15bab3 ]

In looping on FW update tests we occasionally see the
FW_ACTIVATE_STATUS command fail while it is in its EAGAIN loop
waiting for the FW activate step to finsh inside the FW.  The
firmware is complaining that the done bit is set when a new
dev_cmd is going to be processed.

Doing a clean on the cmd registers and doorbell before exiting
the wait-for-done and cleaning the done bit before the sleep
prevents this from occurring.

Fixes: fbfb8031533c ("ionic: Add hardware init and device commands")
Signed-off-by: Shannon Nelson <snelson@...sando.io>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/pensando/ionic/ionic_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 480f85bc17f99..9ede66842118f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -395,8 +395,8 @@ int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 				ionic_opcode_to_str(opcode), opcode,
 				ionic_error_to_str(err), err);
 
-			msleep(1000);
 			iowrite32(0, &idev->dev_cmd_regs->done);
+			msleep(1000);
 			iowrite32(1, &idev->dev_cmd_regs->doorbell);
 			goto try_again;
 		}
@@ -409,6 +409,8 @@ int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 		return ionic_error_to_errno(err);
 	}
 
+	ionic_dev_cmd_clean(ionic);
+
 	return 0;
 }
 
-- 
2.35.1