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Staging: hv: make Device->RequestLock a real spinlock

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Don't use the wrapper functions for this lock, make it a real
lock so that we know what is going on.

I don't think we really want to be doing a irqsave for this code, but I
left it alone to preserve the original codepath.  It should be reviewed
later.

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-07-15 14:55:29 -07:00
parent a98f96eed5
commit 880fb89c1f
1 changed files with 12 additions and 14 deletions
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26
drivers/staging/hv/RndisFilter.c
View file

@ -54,7 +54,7 @@ typedef struct _RNDIS_DEVICE {
u32 LinkStatus;
u32 NewRequestId;
HANDLE RequestLock;
spinlock_t request_lock;
LIST_ENTRY RequestList;
unsigned char HwMacAddr[HW_MACADDR_LEN];
@ -216,12 +216,7 @@ static inline RNDIS_DEVICE* GetRndisDevice(void)
return NULL;
}
device->RequestLock = SpinlockCreate();
if (!device->RequestLock)
{
kfree(device);
return NULL;
}
spin_lock_init(&device->request_lock);
INITIALIZE_LIST_HEAD(&device->RequestList);
@ -232,7 +227,6 @@ static inline RNDIS_DEVICE* GetRndisDevice(void)
static inline void PutRndisDevice(RNDIS_DEVICE *Device)
{
SpinlockClose(Device->RequestLock);
kfree(Device);
}
@ -241,6 +235,7 @@ static inline RNDIS_REQUEST* GetRndisRequest(RNDIS_DEVICE *Device, u32 MessageTy
RNDIS_REQUEST *request;
RNDIS_MESSAGE *rndisMessage;
RNDIS_SET_REQUEST *set;
unsigned long flags;
request = kzalloc(sizeof(RNDIS_REQUEST), GFP_KERNEL);
if (!request)
@ -265,18 +260,20 @@ static inline RNDIS_REQUEST* GetRndisRequest(RNDIS_DEVICE *Device, u32 MessageTy
set->RequestId = InterlockedIncrement((int*)&Device->NewRequestId);
// Add to the request list
SpinlockAcquire(Device->RequestLock);
spin_lock_irqsave(&Device->request_lock, flags);
INSERT_TAIL_LIST(&Device->RequestList, &request->ListEntry);
SpinlockRelease(Device->RequestLock);
spin_unlock_irqrestore(&Device->request_lock, flags);
return request;
}
static inline void PutRndisRequest(RNDIS_DEVICE *Device, RNDIS_REQUEST *Request)
{
SpinlockAcquire(Device->RequestLock);
unsigned long flags;
spin_lock_irqsave(&Device->request_lock, flags);
REMOVE_ENTRY_LIST(&Request->ListEntry);
SpinlockRelease(Device->RequestLock);
spin_unlock_irqrestore(&Device->request_lock, flags);
WaitEventClose(Request->WaitEvent);
kfree(Request);
@ -385,10 +382,11 @@ RndisFilterReceiveResponse(
LIST_ENTRY *curr;
RNDIS_REQUEST *request=NULL;
bool found = false;
unsigned long flags;
DPRINT_ENTER(NETVSC);
SpinlockAcquire(Device->RequestLock);
spin_lock_irqsave(&Device->request_lock, flags);
ITERATE_LIST_ENTRIES(anchor, curr, &Device->RequestList)
{
request = CONTAINING_RECORD(curr, RNDIS_REQUEST, ListEntry);
@ -403,7 +401,7 @@ RndisFilterReceiveResponse(
break;
}
}
SpinlockRelease(Device->RequestLock);
spin_unlock_irqrestore(&Device->request_lock, flags);
if (found)
{