NTB: No sleeping in interrupt context
Move all cancel_delayed_work_sync to a work thread to prevent sleeping
in interrupt context (when the NTB link goes down). Caught via
'Sleep inside atomic section checking'
Signed-off-by: Jon Mason <jon.mason@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 2823087..bf7ade1 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -110,6 +110,7 @@
void (*event_handler) (void *data, int status);
struct delayed_work link_work;
+ struct work_struct link_cleanup;
struct dentry *debugfs_dir;
struct dentry *debugfs_stats;
@@ -148,6 +149,7 @@
unsigned long qp_bitmap;
bool transport_link;
struct delayed_work link_work;
+ struct work_struct link_cleanup;
struct dentry *debugfs_dir;
};
@@ -510,8 +512,11 @@
return 0;
}
-static void ntb_qp_link_down(struct ntb_transport_qp *qp)
+static void ntb_qp_link_cleanup(struct work_struct *work)
{
+ struct ntb_transport_qp *qp = container_of(work,
+ struct ntb_transport_qp,
+ link_cleanup);
struct ntb_transport *nt = qp->transport;
struct pci_dev *pdev = ntb_query_pdev(nt->ndev);
@@ -531,8 +536,15 @@
msecs_to_jiffies(NTB_LINK_DOWN_TIMEOUT));
}
-static void ntb_transport_conn_down(struct ntb_transport *nt)
+static void ntb_qp_link_down(struct ntb_transport_qp *qp)
{
+ schedule_work(&qp->link_cleanup);
+}
+
+static void ntb_transport_link_cleanup(struct work_struct *work)
+{
+ struct ntb_transport *nt = container_of(work, struct ntb_transport,
+ link_cleanup);
int i;
if (nt->transport_link == NTB_LINK_DOWN)
@@ -562,7 +574,7 @@
schedule_delayed_work(&nt->link_work, 0);
break;
case NTB_EVENT_HW_LINK_DOWN:
- ntb_transport_conn_down(nt);
+ schedule_work(&nt->link_cleanup);
break;
default:
BUG();
@@ -769,6 +781,7 @@
}
INIT_DELAYED_WORK(&qp->link_work, ntb_qp_link_work);
+ INIT_WORK(&qp->link_cleanup, ntb_qp_link_cleanup);
spin_lock_init(&qp->ntb_rx_pend_q_lock);
spin_lock_init(&qp->ntb_rx_free_q_lock);
@@ -814,6 +827,7 @@
ntb_transport_init_queue(nt, i);
INIT_DELAYED_WORK(&nt->link_work, ntb_transport_link_work);
+ INIT_WORK(&nt->link_cleanup, ntb_transport_link_cleanup);
rc = ntb_register_event_callback(nt->ndev,
ntb_transport_event_callback);
