isp1362-hcd: use bitmap_find_next_zero_area

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 20 deletions

diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index 5c774ab98252..73352f3739b5 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -80,7 +80,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/io.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
 
 #include <asm/irq.h>
 #include <asm/system.h>
@@ -190,10 +190,8 @@ static int claim_ptd_buffers(struct isp1362_ep_queue *epq,
                              struct isp1362_ep *ep, u16 len)
 {
         int ptd_offset = -EINVAL;
-        int index;
         int num_ptds = ((len + PTD_HEADER_SIZE - 1) / epq->blk_size) + 1;
-        int found = -1;
-        int last = -1;
+        int found;
 
         BUG_ON(len > epq->buf_size);
 
@@ -205,20 +203,9 @@ static int claim_ptd_buffers(struct isp1362_ep_queue *epq,
                     epq->name, len, epq->blk_size, num_ptds, epq->buf_map, epq->skip_map);
         BUG_ON(ep->num_ptds != 0);
 
-        for (index = 0; index <= epq->buf_count - num_ptds; index++) {
-                if (test_bit(index, &epq->buf_map))
-                        continue;
-                found = index;
-                for (last = index + 1; last < index + num_ptds; last++) {
-                        if (test_bit(last, &epq->buf_map)) {
-                                found = -1;
-                                break;
-                        }
-                }
-                if (found >= 0)
-                        break;
-        }
-        if (found < 0)
+        found = bitmap_find_next_zero_area(&epq->buf_map, epq->buf_count, 0,
+                                                num_ptds, 0);
+        if (found >= epq->buf_count)
                 return -EOVERFLOW;
 
         DBG(1, "%s: Found %d PTDs[%d] for %d/%d byte\n", __func__,
@@ -230,8 +217,7 @@ static int claim_ptd_buffers(struct isp1362_ep_queue *epq,
         epq->buf_avail -= num_ptds;
         BUG_ON(epq->buf_avail > epq->buf_count);
         ep->ptd_index = found;
-        for (index = found; index < last; index++)
-                __set_bit(index, &epq->buf_map);
+        bitmap_set(&epq->buf_map, found, num_ptds);
         DBG(1, "%s: Done %s PTD[%d] $%04x, avail %d count %d claimed %d %08lx:%08lx\n",
             __func__, epq->name, ep->ptd_index, ep->ptd_offset,
             epq->buf_avail, epq->buf_count, num_ptds, epq->buf_map, epq->skip_map);