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Commit 3e1a80f1 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Russell King
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[ARM] 4153/1: fix consistent_sync() off-by-one BUG check 



In consistent_sync(), start + size can end up pointing one byte
beyond the end of the direct RAM mapping.  We shouldn't BUG() when
this happens.

Signed-off-by: default avatarLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 7ae5a761

arch/arm/mm/consistent.c

+1 −1
Original line number Diff line number Diff line
@@ -485,7 +485,7 @@ void consistent_sync(const void *start, size_t size, int direction) 
{

	const void *end = start + size;



	BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end));

	BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end - 1));



	switch (direction) {

	case DMA_FROM_DEVICE:		/* invalidate only */