qeth: improve recovery during resource shortage

In case there are no system resources to run a recovery we have to clear
recovery bitmasks so a further automatic or manual driven recovery can
fix up the device.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index fff57de78943..680040572bcb 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1329,6 +1329,7 @@ static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
 
 static void qeth_start_kernel_thread(struct work_struct *work)
 {
+        struct task_struct *ts;
         struct qeth_card *card = container_of(work, struct qeth_card,
                                         kernel_thread_starter);
         QETH_CARD_TEXT(card , 2, "strthrd");
@@ -1336,9 +1337,15 @@ static void qeth_start_kernel_thread(struct work_struct *work)
         if (card->read.state != CH_STATE_UP &&
             card->write.state != CH_STATE_UP)
                 return;
-        if (qeth_do_start_thread(card, QETH_RECOVER_THREAD))
-                kthread_run(card->discipline.recover, (void *) card,
+        if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
+                ts = kthread_run(card->discipline.recover, (void *)card,
                                 "qeth_recover");
+                if (IS_ERR(ts)) {
+                        qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
+                        qeth_clear_thread_running_bit(card,
+                                QETH_RECOVER_THREAD);
+                }
+        }
 }
 
 static int qeth_setup_card(struct qeth_card *card)