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Commit f6c17484 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: storvsc: Introduce state to manage the lifecycle of stor device 



Introduce state to manage the lifecycle of stor device. This would be the
basis for managing the references on the stor object.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent df977d6c

drivers/staging/hv/hyperv_storage.h

+1 −1
Original line number Diff line number Diff line
@@ -266,7 +266,7 @@ struct storvsc_device { 


	/* 0 indicates the device is being destroyed */

	atomic_t ref_count;



	bool	 destroy;

	bool	 drain_notify;

	atomic_t num_outstanding_req;

drivers/staging/hv/storvsc.c

+7 −1
Original line number Diff line number Diff line
@@ -43,7 +43,7 @@ static inline struct storvsc_device *alloc_stor_device(struct hv_device *device) 
	/* Set to 2 to allow both inbound and outbound traffics */

	/* (ie get_out_stor_device() and get_in_stor_device()) to proceed. */

	atomic_set(&stor_device->ref_count, 2);



	stor_device->destroy = false;

	init_waitqueue_head(&stor_device->waiting_to_drain);

	stor_device->device = device;

	device->ext = stor_device;
@@ -399,9 +399,15 @@ int storvsc_dev_add(struct hv_device *device, 
int storvsc_dev_remove(struct hv_device *device)

{

	struct storvsc_device *stor_device;

	unsigned long flags;





	stor_device = release_stor_device(device);



	spin_lock_irqsave(&device->channel->inbound_lock, flags);

	stor_device->destroy = true;

	spin_unlock_irqrestore(&device->channel->inbound_lock, flags);



	/*

	 * At this point, all outbound traffic should be disable. We

	 * only allow inbound traffic (responses) to proceed so that