diff options
| -rw-r--r-- | drivers/scsi/st.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 7f3f317ee6ca..3984cd82fe10 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -3747,20 +3747,20 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm priority = GFP_KERNEL | __GFP_NOWARN; if (need_dma) priority |= GFP_DMA; - for (b_size = PAGE_SIZE, order=0; order <= 6 && - b_size < new_size - STbuffer->buffer_size; - order++, b_size *= 2) - ; /* empty */ + + if (STbuffer->frp_segs) { + b_size = STbuffer->frp[0].length; + order = get_order(b_size); + } else { + for (b_size = PAGE_SIZE, order = 0; + order <= 6 && b_size < new_size; order++, b_size *= 2) + ; /* empty */ + } for (segs = STbuffer->frp_segs, got = STbuffer->buffer_size; segs < max_segs && got < new_size;) { STbuffer->frp[segs].page = alloc_pages(priority, order); if (STbuffer->frp[segs].page == NULL) { - if (new_size - got <= (max_segs - segs) * b_size / 2) { - b_size /= 2; /* Large enough for the rest of the buffers */ - order--; - continue; - } DEB(STbuffer->buffer_size = got); normalize_buffer(STbuffer); return 0; |