[BLOCK] ll_rw_blk: make max_sectors and max_hw_sectors unsigned ints

IDE lba48 can support full 64k request size, which overflows the
max_hw_sectors variable.

Signed-off-by: Jens Axboe <axboe@suse.de>

block/ll_rw_blk.c

@@ -662,7 +662,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit);
  *    Enables a low level driver to set an upper limit on the size of
  *    received requests.
  **/
-void blk_queue_max_sectors(request_queue_t *q, unsigned short max_sectors)
+void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors)
 {
 	if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
 		max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);

include/linux/blkdev.h

@@ -392,8 +392,8 @@ struct request_queue
 	unsigned int		nr_congestion_off;
 	unsigned int		nr_batching;
 
-	unsigned short		max_sectors;
-	unsigned short		max_hw_sectors;
+	unsigned int		max_sectors;
+	unsigned int		max_hw_sectors;
 	unsigned short		max_phys_segments;
 	unsigned short		max_hw_segments;
 	unsigned short		hardsect_size;
@@ -697,7 +697,7 @@ extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
 extern void blk_cleanup_queue(request_queue_t *);
 extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
 extern void blk_queue_bounce_limit(request_queue_t *, u64);
-extern void blk_queue_max_sectors(request_queue_t *, unsigned short);
+extern void blk_queue_max_sectors(request_queue_t *, unsigned int);
 extern void blk_queue_max_phys_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_hw_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_segment_size(request_queue_t *, unsigned int);