ALSA: usb-audio: add support for Akai MPD16

[safe/jmp/linux-2.6] / block / blk-settings.c

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 61afae9..f5ed5a1 100644 (file)
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -8,7 +8,9 @@
 #include <linux/blkdev.h>
 #include <linux/bootmem.h>     /* for max_pfn/max_low_pfn */
 #include <linux/gcd.h>
+#include <linux/lcm.h>
 #include <linux/jiffies.h>
+#include <linux/gfp.h>
 
 #include "blk.h"
 
@@ -91,8 +93,7 @@ EXPORT_SYMBOL_GPL(blk_queue_lld_busy);
  */
 void blk_set_default_limits(struct queue_limits *lim)
 {
-       lim->max_phys_segments = MAX_PHYS_SEGMENTS;
-       lim->max_hw_segments = MAX_HW_SEGMENTS;
+       lim->max_segments = BLK_MAX_SEGMENTS;
        lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
        lim->max_segment_size = BLK_MAX_SEGMENT_SIZE;
        lim->max_sectors = BLK_DEF_MAX_SECTORS;
@@ -252,17 +253,15 @@ void blk_queue_max_discard_sectors(struct request_queue *q,
 EXPORT_SYMBOL(blk_queue_max_discard_sectors);
 
 /**
- * blk_queue_max_phys_segments - set max phys segments for a request for this queue
+ * blk_queue_max_segments - set max hw segments for a request for this queue
  * @q:  the request queue for the device
  * @max_segments:  max number of segments
  *
  * Description:
  *    Enables a low level driver to set an upper limit on the number of
- *    physical data segments in a request.  This would be the largest sized
- *    scatter list the driver could handle.
+ *    hw data segments in a request.
  **/
-void blk_queue_max_phys_segments(struct request_queue *q,
-                                unsigned short max_segments)
+void blk_queue_max_segments(struct request_queue *q, unsigned short max_segments)
 {
        if (!max_segments) {
                max_segments = 1;
@@ -270,33 +269,9 @@ void blk_queue_max_phys_segments(struct request_queue *q,
                       __func__, max_segments);
        }
 
-       q->limits.max_phys_segments = max_segments;
+       q->limits.max_segments = max_segments;
 }
-EXPORT_SYMBOL(blk_queue_max_phys_segments);
-
-/**
- * blk_queue_max_hw_segments - set max hw segments for a request for this queue
- * @q:  the request queue for the device
- * @max_segments:  max number of segments
- *
- * Description:
- *    Enables a low level driver to set an upper limit on the number of
- *    hw data segments in a request.  This would be the largest number of
- *    address/length pairs the host adapter can actually give at once
- *    to the device.
- **/
-void blk_queue_max_hw_segments(struct request_queue *q,
-                              unsigned short max_segments)
-{
-       if (!max_segments) {
-               max_segments = 1;
-               printk(KERN_INFO "%s: set to minimum %d\n",
-                      __func__, max_segments);
-       }
-
-       q->limits.max_hw_segments = max_segments;
-}
-EXPORT_SYMBOL(blk_queue_max_hw_segments);
+EXPORT_SYMBOL(blk_queue_max_segments);
 
 /**
  * blk_queue_max_segment_size - set max segment size for blk_rq_map_sg
@@ -488,16 +463,6 @@ void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
 }
 EXPORT_SYMBOL(blk_queue_stack_limits);
 
-static unsigned int lcm(unsigned int a, unsigned int b)
-{
-       if (a && b)
-               return (a * b) / gcd(a, b);
-       else if (b)
-               return b;
-
-       return a;
-}
-
 /**
  * blk_stack_limits - adjust queue_limits for stacked devices
  * @t: the stacking driver limits (top device)
@@ -531,11 +496,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
        t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
                                            b->seg_boundary_mask);
 
-       t->max_phys_segments = min_not_zero(t->max_phys_segments,
-                                           b->max_phys_segments);
-
-       t->max_hw_segments = min_not_zero(t->max_hw_segments,
-                                         b->max_hw_segments);
+       t->max_segments = min_not_zero(t->max_segments, b->max_segments);
 
        t->max_segment_size = min_not_zero(t->max_segment_size,
                                           b->max_segment_size);
@@ -739,22 +700,19 @@ EXPORT_SYMBOL(blk_queue_update_dma_pad);
  * does is adjust the queue so that the buf is always appended
  * silently to the scatterlist.
  *
- * Note: This routine adjusts max_hw_segments to make room for
- * appending the drain buffer.  If you call
- * blk_queue_max_hw_segments() or blk_queue_max_phys_segments() after
- * calling this routine, you must set the limit to one fewer than your
- * device can support otherwise there won't be room for the drain
- * buffer.
+ * Note: This routine adjusts max_hw_segments to make room for appending
+ * the drain buffer.  If you call blk_queue_max_segments() after calling
+ * this routine, you must set the limit to one fewer than your device
+ * can support otherwise there won't be room for the drain buffer.
  */
 int blk_queue_dma_drain(struct request_queue *q,
                               dma_drain_needed_fn *dma_drain_needed,
                               void *buf, unsigned int size)
 {
-       if (queue_max_hw_segments(q) < 2 || queue_max_phys_segments(q) < 2)
+       if (queue_max_segments(q) < 2)
                return -EINVAL;
        /* make room for appending the drain */
-       blk_queue_max_hw_segments(q, queue_max_hw_segments(q) - 1);
-       blk_queue_max_phys_segments(q, queue_max_phys_segments(q) - 1);
+       blk_queue_max_segments(q, queue_max_segments(q) - 1);
        q->dma_drain_needed = dma_drain_needed;
        q->dma_drain_buffer = buf;
        q->dma_drain_size = size;