RDMA/cxgb4: Increase epd buff size for debug interface

IPv6 address string lengths require increasing the buffer size for
debugfs handlers.
Signed-off-by: NPramod Kumar <pramod@chelsio.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

drivers/infiniband/hw/cxgb4/device.c

@@ -670,7 +670,7 @@ static int ep_open(struct inode *inode, struct file *file)
 	idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
 	spin_unlock_irq(&epd->devp->lock);
 
-	epd->bufsize = count * 160;
+	epd->bufsize = count * 240;
 	epd->buf = vmalloc(epd->bufsize);
 	if (!epd->buf) {
 		ret = -ENOMEM;