leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

isci: Don't wait for an RNC suspend if it's being destroyed.

Browse Source 
Make sure that the wait for suspend can handle the RNC destruction case.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jeff Skirvin 2012-03-08 22:42:08 -08:00 committed by Dan Williams
parent c5457a82a4
commit 1f05388933
3 changed files with 28 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/scsi/isci/remote_device.c
View File

@ -142,7 +142,12 @@ static bool isci_compare_suspendcount(
u32 localcount)
{
smp_rmb();
return localcount != idev->rnc.suspend_count;
/* Check for a change in the suspend count, or the RNC
* being destroyed.
*/
return (localcount != idev->rnc.suspend_count)
|| sci_remote_node_context_is_being_destroyed(&idev->rnc);
}
static bool isci_check_reqterm(
@ -1380,7 +1385,8 @@ enum sci_status isci_remote_device_resume_from_abort(
struct isci_remote_device *idev)
{
unsigned long flags;
enum sci_status status;
enum sci_status status = SCI_SUCCESS;
int destroyed;
spin_lock_irqsave(&ihost->scic_lock, flags);
/* Preserve any current resume callbacks, for instance from other
@ -1390,11 +1396,17 @@ enum sci_status isci_remote_device_resume_from_abort(
idev->abort_resume_cbparam = idev->rnc.user_cookie;
set_bit(IDEV_ABORT_PATH_RESUME_PENDING, &idev->flags);
clear_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags);
status = sci_remote_device_resume(
destroyed = sci_remote_node_context_is_being_destroyed(&idev->rnc);
if (!destroyed)
status = sci_remote_device_resume(
idev, isci_remote_device_resume_from_abort_complete,
idev);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
isci_remote_device_wait_for_resume_from_abort(ihost, idev);
if (!destroyed)
isci_remote_device_wait_for_resume_from_abort(ihost, idev);
else
clear_bit(IDEV_ABORT_PATH_RESUME_PENDING, &idev->flags);
return status;
}

5
drivers/scsi/isci/remote_node_context.c
View File

@ -270,6 +270,8 @@ static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_
static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
{
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
struct isci_remote_device *idev = rnc_to_dev(rnc);
struct isci_host *ihost = idev->owning_port->owning_controller;
/* Check to see if we have gotten back to the initial state because
* someone requested to destroy the remote node context object.
@ -277,6 +279,9 @@ static void sci_remote_node_context_initial_state_enter(struct sci_base_state_ma
if (sm->previous_state_id == SCI_RNC_INVALIDATING) {
rnc->destination_state = RNC_DEST_UNSPECIFIED;
sci_remote_node_context_notify_user(rnc);
smp_wmb();
wake_up(&ihost->eventq);
}
}

7
drivers/scsi/isci/remote_node_context.h
View File

@ -226,4 +226,11 @@ enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context
int sci_remote_node_context_is_safe_to_abort(
struct sci_remote_node_context *sci_rnc);
static inline bool sci_remote_node_context_is_being_destroyed(
struct sci_remote_node_context *sci_rnc)
{
return ((sci_rnc->sm.current_state_id == SCI_RNC_INVALIDATING)
&& (sci_rnc->destination_state == RNC_DEST_FINAL))
|| (sci_rnc->sm.current_state_id == SCI_RNC_INITIAL);
}
#endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */