netdev - [PATCH net] pds_core: Fix FW recovery detection

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 for Android: free password hash cracker in your pocket

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

Date: Mon, 5 Jun 2023 12:51:16 -0700
From: Brett Creeley <brett.creeley@....com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	<pabeni@...hat.com>, <kuba@...nel.org>, <edumazet@...gle.com>,
	<davem@...emloft.net>
CC: <brett.creeley@....com>, <shannon.nelson@....com>
Subject: [PATCH net] pds_core: Fix FW recovery detection

Commit 523847df1b37 ("pds_core: add devcmd device interfaces") included
initial support for FW recovery detection. Unfortunately, the ordering
in pdsc_is_fw_good() was incorrect, which was causing FW recovery to be
undetected by the driver. Fix this by making sure to update the cached
fw_status by calling pdsc_is_fw_running() before setting the local FW
gen.

Fixes: 523847df1b37 ("pds_core: add devcmd device interfaces")
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
Signed-off-by: Brett Creeley <brett.creeley@....com>
---
 drivers/net/ethernet/amd/pds_core/dev.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c
index f7c597ea5daf..debe5216fe29 100644
--- a/drivers/net/ethernet/amd/pds_core/dev.c
+++ b/drivers/net/ethernet/amd/pds_core/dev.c
@@ -68,9 +68,15 @@ bool pdsc_is_fw_running(struct pdsc *pdsc)
 
 bool pdsc_is_fw_good(struct pdsc *pdsc)
 {
-	u8 gen = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION;
+	bool fw_running = pdsc_is_fw_running(pdsc);
+	u8 gen;
 
-	return pdsc_is_fw_running(pdsc) && gen == pdsc->fw_generation;
+	/* Make sure to update the cached fw_status by calling
+	 * pdsc_is_fw_running() before getting the generation
+	 */
+	gen = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION;
+
+	return fw_running && gen == pdsc->fw_generation;
 }
 
 static u8 pdsc_devcmd_status(struct pdsc *pdsc)
-- 
2.17.1