netdev - [PATCH net-next 09/11] ibmvnic: Reset the CRQ queue during driver reset

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]

Date:   Fri, 26 May 2017 10:31:00 -0400
From:   Nathan Fontenot <nfont@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org, tlfalcon@...ux.vnet.ibm.com,
        jallen@...ux.vnet.ibm.com
Subject: [PATCH net-next 09/11] ibmvnic: Reset the CRQ queue during driver
 reset

When a driver reset operation occurs there is not a need to release
the CRQ resources and re-allocate them. Instead a reset of the CRQ
will suffice.

Signed-off-by: Nathan Fontenot <nfont@...ux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 760352f..b9b0c69 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1260,7 +1260,6 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 
 		release_resources(adapter);
 		release_sub_crqs(adapter);
-		release_crq_queue(adapter);
 
 		rc = ibmvnic_init(adapter);
 		if (rc)
@@ -3517,7 +3516,14 @@ static int ibmvnic_init(struct ibmvnic_adapter *adapter)
 	unsigned long timeout = msecs_to_jiffies(30000);
 	int rc;
 
-	rc = init_crq_queue(adapter);
+	if (adapter->resetting) {
+		rc = ibmvnic_reset_crq(adapter);
+		if (!rc)
+			rc = vio_enable_interrupts(adapter->vdev);
+	} else {
+		rc = init_crq_queue(adapter);
+	}
+
 	if (rc) {
 		dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
 		return rc;