[ARM] 5329/1: Feroceon: fix feroceon_l2_inv_range

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.

Cc: <stable@kernel.org>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/arm/mm/cache-feroceon-l2.c b/arch/arm/mm/cache-feroceon-l2.c
index 13cdae8b0d44..80cd207cbaea 100644
--- a/arch/arm/mm/cache-feroceon-l2.c
+++ b/arch/arm/mm/cache-feroceon-l2.c
@@ -150,7 +150,7 @@ 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);
         }
@@ -158,7 +158,7 @@ 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;