ARM: 5329/1: Feroceon: fix feroceon_l2_inv_range

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@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/arm/mm/cache-feroceon-l2.c b/arch/arm/mm/cache-feroceon-l2.c
index 7b5a25d815760b9476503f421b11abaa3fc39db9..4f6cf46a546f54deac71c3c4154197031ee20e7d 100644 (file)
--- 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(unsigned long start, unsigned long end)
        /*
         * 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(unsigned long start, unsigned long end)
        /*
         * 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;