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[NTOSKRNL] Don't keep the spin lock hold too long when we lost the BCB race

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This will avoid a deadlock on unpin.
This commit is contained in:
Pierre Schweitzer 2018-10-12 08:20:32 +02:00
parent cf8ba3bd9c
commit 1acb5a9fab
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GPG key ID: 7545556C3D585B0B
1 changed files with 3 additions and 1 deletions
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4
ntoskrnl/cc/pin.c
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@ -385,6 +385,8 @@ CcPinRead (
iBcb = CcpFindBcb(SharedCacheMap, FileOffset, Length, TRUE); iBcb = CcpFindBcb(SharedCacheMap, FileOffset, Length, TRUE);
if (iBcb != NULL) if (iBcb != NULL)
{ {
KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
/* Free our now unused BCB */ /* Free our now unused BCB */
CcUnpinData(*Bcb); CcUnpinData(*Bcb);
@ -414,8 +416,8 @@ CcPinRead (
/* Insert ourselves in the linked list */ /* Insert ourselves in the linked list */
InsertTailList(&SharedCacheMap->BcbList, &iBcb->BcbEntry); InsertTailList(&SharedCacheMap->BcbList, &iBcb->BcbEntry);
KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
} }
KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
} }
/* We found a BCB, lock it and return it */ /* We found a BCB, lock it and return it */
else else