* re: IB/usnic: Add Cisco VIC low-level hardware driver
@ 2013-12-11 22:39 Dan Carpenter
[not found] ` <20131211223934.GB3955-mgFCXtclrQlZLf2FXnZxJA@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2013-12-11 22:39 UTC (permalink / raw)
To: umalhi-FYB4Gu1CFyUAvxtiuMwx3w; +Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA
Hello Upinder Malhi,
The patch b1819c455542: "IB/usnic: Add Cisco VIC low-level hardware
driver" from Sep 10, 2013, leads to the following Smatch
warning:
drivers/infiniband/hw/usnic/usnic_uiom.c:560
usnic_uiom_get_dev_list()
error: scheduling with locks held: 'spin_lock:lock'
drivers/infiniband/hw/usnic/usnic_uiom.c
553 struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd)
554 {
555 struct usnic_uiom_dev *uiom_dev;
556 struct device **devs;
557 int i = 0;
558
559 spin_lock(&pd->lock);
560 devs = kzalloc(sizeof(*devs)*(pd->dev_cnt + 1), GFP_KERNEL);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
You can't do blocking allocations with a spin_lock held.
561 if (!devs) {
562 devs = ERR_PTR(-ENOMEM);
563 goto out;
564 }
regards,
dan carpenter
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 3+ messages in thread
* [patch] IB/usnic: use GFP_ATOMIC under spinlock
[not found] ` <20131211223934.GB3955-mgFCXtclrQlZLf2FXnZxJA@public.gmane.org>
@ 2014-01-20 10:32 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2014-01-20 10:32 UTC (permalink / raw)
To: Upinder Malhi
Cc: Roland Dreier, Sean Hefty, Hal Rosenstock,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
kernel-janitors-u79uwXL29TY76Z2rM5mHXA
This is called from qp_grp_and_vf_bind() and we are holding the
"vf->lock" so the allocation can't sleep.
Fixes: e3cf00d0a87f ('IB/usnic: Add Cisco VIC low-level hardware driver')
Signed-off-by: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index ae6934c0d05a..16755cdab2c0 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -498,7 +498,7 @@ int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev)
struct usnic_uiom_dev *uiom_dev;
int err;
- uiom_dev = kzalloc(sizeof(*uiom_dev), GFP_KERNEL);
+ uiom_dev = kzalloc(sizeof(*uiom_dev), GFP_ATOMIC);
if (!uiom_dev)
return -ENOMEM;
uiom_dev->dev = dev;
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [patch] IB/usnic: use GFP_ATOMIC under spinlock
@ 2014-01-20 10:32 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2014-01-20 10:32 UTC (permalink / raw)
To: Upinder Malhi
Cc: Roland Dreier, Sean Hefty, Hal Rosenstock,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
kernel-janitors-u79uwXL29TY76Z2rM5mHXA
This is called from qp_grp_and_vf_bind() and we are holding the
"vf->lock" so the allocation can't sleep.
Fixes: e3cf00d0a87f ('IB/usnic: Add Cisco VIC low-level hardware driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index ae6934c0d05a..16755cdab2c0 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -498,7 +498,7 @@ int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev)
struct usnic_uiom_dev *uiom_dev;
int err;
- uiom_dev = kzalloc(sizeof(*uiom_dev), GFP_KERNEL);
+ uiom_dev = kzalloc(sizeof(*uiom_dev), GFP_ATOMIC);
if (!uiom_dev)
return -ENOMEM;
uiom_dev->dev = dev;
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-01-20 10:32 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-12-11 22:39 IB/usnic: Add Cisco VIC low-level hardware driver Dan Carpenter
[not found] ` <20131211223934.GB3955-mgFCXtclrQlZLf2FXnZxJA@public.gmane.org>
2014-01-20 10:32 ` [patch] IB/usnic: use GFP_ATOMIC under spinlock Dan Carpenter
2014-01-20 10:32 ` Dan Carpenter
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.