[patch 08/46] ARM: 5329/1: Feroceon: fix feroceon_l2_inv_range

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Nicolas Pitre <nico@xxxxxxx>

commit 72bc2b1ad62f4d2f0a51b35829093d41f55accce upstream.

Same fix as commit c7cf72dcadb: when 'start' and 'end' are less than a
cacheline apart and 'start' is unaligned we are done after cleaning and
invalidating the first cacheline.

Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/arm/mm/cache-feroceon-l2.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/arm/mm/cache-feroceon-l2.c
+++ b/arch/arm/mm/cache-feroceon-l2.c
@@ -148,7 +148,7 @@ static void feroceon_l2_inv_range(unsign
 	/*
 	 * Clean and invalidate partial last cache line.
 	 */
-	if (end & (CACHE_LINE_SIZE - 1)) {
+	if (start < end && end & (CACHE_LINE_SIZE - 1)) {
 		l2_clean_inv_pa(end & ~(CACHE_LINE_SIZE - 1));
 		end &= ~(CACHE_LINE_SIZE - 1);
 	}
@@ -156,7 +156,7 @@ static void feroceon_l2_inv_range(unsign
 	/*
 	 * Invalidate all full cache lines between 'start' and 'end'.
 	 */
-	while (start != end) {
+	while (start < end) {
 		unsigned long range_end = calc_range_end(start, end);
 		l2_inv_pa_range(start, range_end - CACHE_LINE_SIZE);
 		start = range_end;

-- 
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