netdev - [PATCH net 1/5] pds_core: protect devlink callbacks from fw

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Message-ID: <20230824161754.34264-2-shannon.nelson@amd.com>
Date: Thu, 24 Aug 2023 09:17:50 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <shannon.nelson@....com>, <brett.creeley@....com>, <davem@...emloft.net>,
	<netdev@...r.kernel.org>, <kuba@...nel.org>
CC: <drivers@...sando.io>
Subject: [PATCH net 1/5] pds_core: protect devlink callbacks from fw_down state

Don't access structs that have been cleared when in the fw_down
state and the various structs have been cleaned and are waiting
to recover.  This caused a panic on rmmod when already in fw_down
and devlink_param_unregister() tried to check the parameters.

Fixes: 40ced8944536 ("pds_core: devlink params for enabling VIF support")
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
Reviewed-by: Brett Creeley <brett.creeley@....com>
---
 drivers/net/ethernet/amd/pds_core/devlink.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
index 9c6b3653c1c7..d9607033bbf2 100644
--- a/drivers/net/ethernet/amd/pds_core/devlink.c
+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
@@ -10,6 +10,9 @@ pdsc_viftype *pdsc_dl_find_viftype_by_id(struct pdsc *pdsc,
 {
 	int vt;
 
+	if (!pdsc->viftype_status)
+		return NULL;
+
 	for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++) {
 		if (pdsc->viftype_status[vt].dl_id == dl_id)
 			return &pdsc->viftype_status[vt];
-- 
2.17.1