diff options
| author | Jon Mason <jon.mason@intel.com> | 2013-01-19 10:02:19 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-21 00:45:51 +0100 |
| commit | 7b4f2d3c3b8285fe63cae6b92c7b7030d1d1aa7c (patch) | |
| tree | c333b933cbedd409b8ed2c3b668d7134d707c3c8 /drivers/ntb/ntb_transport.c | |
| parent | NTB: separate transmit and receive windows (diff) | |
| download | linux-7b4f2d3c3b8285fe63cae6b92c7b7030d1d1aa7c.tar.xz linux-7b4f2d3c3b8285fe63cae6b92c7b7030d1d1aa7c.zip | |
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>
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 2823087a1338..bf7ade14c742 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -110,6 +110,7 @@ struct ntb_transport_qp { 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 @@ struct ntb_transport { 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 @@ static int ntb_set_mw(struct ntb_transport *nt, int num_mw, unsigned int size) 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 @@ static void ntb_qp_link_down(struct ntb_transport_qp *qp) 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 @@ static void ntb_transport_event_callback(void *data, enum ntb_hw_event event) 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 @@ static void ntb_transport_init_queue(struct ntb_transport *nt, } 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 @@ int ntb_transport_init(struct pci_dev *pdev) 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); |