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authorJulian Wiedmann <jwi@linux.vnet.ibm.com>2018-03-20 07:59:15 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-08 11:49:43 +0200
commit60aa3ac5c1480283691b2663201f2bc1888d8b5f (patch)
tree8dee4a775c2bc7c914acbb58905ebe6b0d50ad9c
parent61a3becbba4f0a70f0a11d638015a972302ba501 (diff)
s390/qeth: on channel error, reject further cmd requests
[ Upstream commit a6c3d93963e4b333c764fde69802c3ea9eaa9d5c ] When the IRQ handler determines that one of the cmd IO channels has failed and schedules recovery, block any further cmd requests from being submitted. The request would inevitably stall, and prevent the recovery from making progress until the request times out. This sort of error was observed after Live Guest Relocation, where the pending IO on the READ channel intentionally gets terminated to kick-start recovery. Simultaneously the guest executed SIOCETHTOOL, triggering qeth to issue a QUERY CARD INFO command. The command then stalled in the inoperabel WRITE channel. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/s390/net/qeth_core_main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 99d4b266ab09..906e8014ebb9 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1158,6 +1158,7 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
}
rc = qeth_get_problem(cdev, irb);
if (rc) {
+ card->read_or_write_problem = 1;
qeth_clear_ipacmd_list(card);
qeth_schedule_recovery(card);
goto out;