Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband:
  IB/ehca: Fix mismatched spin_unlock in irq handler
  IB/ehca: Fix improper use of yield() with spinlock held
  IB/srp: Check match_strdup() return

3 files changed, 26 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_cq.c b/drivers/infiniband/hw/ehca/ehca_cq.c
index 93995b658d94..6074c897f51c 100644
--- a/drivers/infiniband/hw/ehca/ehca_cq.c
+++ b/drivers/infiniband/hw/ehca/ehca_cq.c
@@ -344,8 +344,11 @@ int ehca_destroy_cq(struct ib_cq *cq)
         unsigned long flags;
 
         spin_lock_irqsave(&ehca_cq_idr_lock, flags);
-        while (my_cq->nr_callbacks)
+        while (my_cq->nr_callbacks) {
+                spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
                 yield();
+                spin_lock_irqsave(&ehca_cq_idr_lock, flags);
+        }
 
         idr_remove(&ehca_cq_idr, my_cq->token);
         spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index e7209afb4250..c069be8cbcb2 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -440,7 +440,8 @@ void ehca_tasklet_eq(unsigned long data)
                                         cq = idr_find(&ehca_cq_idr, token);
 
                                         if (cq == NULL) {
-                                                spin_unlock(&ehca_cq_idr_lock);
+                                                spin_unlock_irqrestore(&ehca_cq_idr_lock,
+                                                                       flags);
                                                 break;
                                         }
 
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index cdecbf5911c8..72611fd15103 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1621,18 +1621,30 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
                 switch (token) {
                 case SRP_OPT_ID_EXT:
                         p = match_strdup(args);
+                        if (!p) {
+                                ret = -ENOMEM;
+                                goto out;
+                        }
                         target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16));
                         kfree(p);
                         break;
 
                 case SRP_OPT_IOC_GUID:
                         p = match_strdup(args);
+                        if (!p) {
+                                ret = -ENOMEM;
+                                goto out;
+                        }
                         target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16));
                         kfree(p);
                         break;
 
                 case SRP_OPT_DGID:
                         p = match_strdup(args);
+                        if (!p) {
+                                ret = -ENOMEM;
+                                goto out;
+                        }
                         if (strlen(p) != 32) {
                                 printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p);
                                 kfree(p);
@@ -1656,6 +1668,10 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
 
                 case SRP_OPT_SERVICE_ID:
                         p = match_strdup(args);
+                        if (!p) {
+                                ret = -ENOMEM;
+                                goto out;
+                        }
                         target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16));
                         kfree(p);
                         break;
@@ -1693,6 +1709,10 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
 
                 case SRP_OPT_INITIATOR_EXT:
                         p = match_strdup(args);
+                        if (!p) {
+                                ret = -ENOMEM;
+                                goto out;
+                        }
                         target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16));
                         kfree(p);
                         break;