[PATCH] libertas: don't use dynamic-sized array

[Andrey Yurovsky <andrey@cozybit.com>]

sparse complains about a bad constant expression due to the use of a
dynamic-sized array in get_common_rates().  Allocate and free the array
instead.

Signed-off-by: Andrey Yurovsky <andrey@cozybit.com>
---
 drivers/net/wireless/libertas/assoc.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/libertas/assoc.c b/drivers/net/wireless/libertas/assoc.c
index 1902b6f..9834399 100644
--- a/drivers/net/wireless/libertas/assoc.c
+++ b/drivers/net/wireless/libertas/assoc.c
@@ -45,9 +45,14 @@ static int get_common_rates(struct lbs_private *priv,
 {
 	u8 *card_rates = lbs_bg_rates;
 	int ret = 0, i, j;
-	u8 tmp[(ARRAY_SIZE(lbs_bg_rates) - 1) * (*rates_size - 1)];
+	u8 *tmp;
 	size_t tmp_size = 0;
 
+	tmp = kzalloc((ARRAY_SIZE(lbs_bg_rates) - 1) * (*rates_size - 1),
+			GFP_KERNEL);
+	if (!tmp)
+		return -1;
+
 	/* For each rate in card_rates that exists in rate1, copy to tmp */
 	for (i = 0; i < ARRAY_SIZE(lbs_bg_rates) && card_rates[i]; i++) {
 		for (j = 0; j < *rates_size && rates[j]; j++) {
@@ -75,6 +80,7 @@ done:
 	memset(rates, 0, *rates_size);
 	*rates_size = min_t(int, tmp_size, *rates_size);
 	memcpy(rates, tmp, *rates_size);
+	kfree(tmp);
 	return ret;
 }
 
-- 
1.5.6.3