scsi: qedf: fixup bit operations
test_bit() is atomic, test_bit() || test_bit() is not. So protect consecutive bit tests with a lock to avoid races. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Saurav Kashyap <skashyap@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Родитель
6d1368e8f9
Коммит
78a8ab3cc0
|
@ -358,20 +358,24 @@ void qedf_restart_rport(struct qedf_rport *fcport)
|
|||
struct fc_lport *lport;
|
||||
struct fc_rport_priv *rdata;
|
||||
u32 port_id;
|
||||
unsigned long flags;
|
||||
|
||||
if (!fcport)
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&fcport->rport_lock, flags);
|
||||
if (test_bit(QEDF_RPORT_IN_RESET, &fcport->flags) ||
|
||||
!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) ||
|
||||
test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
|
||||
QEDF_ERR(&(fcport->qedf->dbg_ctx), "fcport %p already in reset or not offloaded.\n",
|
||||
fcport);
|
||||
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Set that we are now in reset */
|
||||
set_bit(QEDF_RPORT_IN_RESET, &fcport->flags);
|
||||
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
||||
|
||||
rdata = fcport->rdata;
|
||||
if (rdata) {
|
||||
|
|
|
@ -1435,12 +1435,14 @@ static void qedf_rport_event_handler(struct fc_lport *lport,
|
|||
*/
|
||||
fcport = (struct qedf_rport *)&rp[1];
|
||||
|
||||
spin_lock_irqsave(&fcport->rport_lock, flags);
|
||||
/* Only free this fcport if it is offloaded already */
|
||||
if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) &&
|
||||
!test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
|
||||
&fcport->flags)) {
|
||||
set_bit(QEDF_RPORT_UPLOADING_CONNECTION,
|
||||
&fcport->flags);
|
||||
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
||||
qedf_cleanup_fcport(qedf, fcport);
|
||||
/*
|
||||
* Remove fcport to list of qedf_ctx list of offloaded
|
||||
|
@ -1453,8 +1455,9 @@ static void qedf_rport_event_handler(struct fc_lport *lport,
|
|||
clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
|
||||
&fcport->flags);
|
||||
atomic_dec(&qedf->num_offloads);
|
||||
} else {
|
||||
spin_unlock_irqrestore(&fcport->rport_lock, flags);
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case RPORT_EV_NONE:
|
||||
|
|
Загрузка…
Ссылка в новой задаче