[SCSI] st: remove unused orig_frp_segs
FUJITA Tomonori [Thu, 18 Dec 2008 05:49:48 +0000 (14:49 +0900)]
orig_frp_segs in struct st_buffer is always zero. We don't need it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/st.c
drivers/scsi/st.h

index 22ddca8..50dbe14 100644 (file)
@@ -3749,7 +3749,7 @@ static struct st_buffer *new_tape_buffer(int need_dma, int max_sg)
                printk(KERN_NOTICE "st: Can't allocate new tape buffer.\n");
                return NULL;
        }
-       tb->frp_segs = tb->orig_frp_segs = 0;
+       tb->frp_segs = 0;
        tb->use_sg = max_sg;
        tb->dma = need_dma;
        tb->buffer_size = 0;
@@ -3839,11 +3839,11 @@ static void normalize_buffer(struct st_buffer * STbuffer)
 {
        int i, order = STbuffer->map_data.page_order;
 
-       for (i = STbuffer->orig_frp_segs; i < STbuffer->frp_segs; i++) {
+       for (i = 0; i < STbuffer->frp_segs; i++) {
                __free_pages(STbuffer->reserved_pages[i], order);
                STbuffer->buffer_size -= (PAGE_SIZE << order);
        }
-       STbuffer->frp_segs = STbuffer->orig_frp_segs;
+       STbuffer->frp_segs = 0;
        STbuffer->frp_sg_current = 0;
        STbuffer->sg_segs = 0;
        STbuffer->map_data.page_order = 0;
@@ -4304,7 +4304,6 @@ static void scsi_tape_release(struct kref *kref)
        tpnt->device = NULL;
 
        if (tpnt->buffer) {
-               tpnt->buffer->orig_frp_segs = 0;
                normalize_buffer(tpnt->buffer);
                kfree(tpnt->buffer->reserved_pages);
                kfree(tpnt->buffer);
index d297607..e682f80 100644 (file)
@@ -51,7 +51,6 @@ struct st_buffer {
        unsigned char *b_data;
        unsigned short use_sg;  /* zero or max number of s/g segments for this adapter */
        unsigned short sg_segs;         /* number of segments in s/g list */
-       unsigned short orig_frp_segs;   /* number of segments allocated at first try */
        unsigned short frp_segs;        /* number of buffer segments */
        unsigned int frp_sg_current;    /* driver buffer length currently in s/g list */
 };