@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/log2.h>
#include "rt2x00.h"
#include "rt2x00lib.h"
@@ -811,13 +812,18 @@ static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
*/
if (test_bit(DRIVER_REQUIRE_TXSTATUS_FIFO, &rt2x00dev->flags)) {
/*
- * Allocate txstatus fifo and tasklet, we use a size of 512
- * for the kfifo which is big enough to store 512/4=128 tx
- * status reports. In the worst case (tx status for all tx
- * queues gets reported before we've got a chance to handle
- * them) 24*4=384 tx status reports need to be cached.
+ * Allocate the txstatus fifo. In the worst case the tx
+ * status fifo has to hold the tx status of all entries
+ * in all tx queues. Hence, calculate the kfifo size as
+ * tx_queues * entry_num and round up to the nearest
+ * power of 2.
*/
- status = kfifo_alloc(&rt2x00dev->txstatus_fifo, 512,
+ int kfifo_size =
+ roundup_pow_of_two(rt2x00dev->ops->tx_queues *
+ rt2x00dev->ops->tx->entry_num *
+ sizeof(u32));
+
+ status = kfifo_alloc(&rt2x00dev->txstatus_fifo, kfifo_size,
GFP_KERNEL);
if (status)
return status;