diff options
Diffstat (limited to 'drivers/s390/block/dasd_fba.c')
| -rw-r--r-- | drivers/s390/block/dasd_fba.c | 33 |
1 files changed, 4 insertions, 29 deletions
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index 045e548630df..bcbb2f8e91fe 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -748,35 +748,9 @@ dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, free_page((unsigned long) page); } -/* - * Initialize block layer request queue. - */ -static void dasd_fba_setup_blk_queue(struct dasd_block *block) +static unsigned int dasd_fba_max_sectors(struct dasd_block *block) { - unsigned int logical_block_size = block->bp_block; - struct request_queue *q = block->gdp->queue; - unsigned int max_bytes, max_discard_sectors; - int max; - - max = DASD_FBA_MAX_BLOCKS << block->s2b_shift; - blk_queue_flag_set(QUEUE_FLAG_NONROT, q); - q->limits.max_dev_sectors = max; - blk_queue_logical_block_size(q, logical_block_size); - blk_queue_max_hw_sectors(q, max); - blk_queue_max_segments(q, USHRT_MAX); - /* With page sized segments each segment can be translated into one idaw/tidaw */ - blk_queue_max_segment_size(q, PAGE_SIZE); - blk_queue_segment_boundary(q, PAGE_SIZE - 1); - - q->limits.discard_granularity = logical_block_size; - - /* Calculate max_discard_sectors and make it PAGE aligned */ - max_bytes = USHRT_MAX * logical_block_size; - max_bytes = ALIGN_DOWN(max_bytes, PAGE_SIZE); - max_discard_sectors = max_bytes / logical_block_size; - - blk_queue_max_discard_sectors(q, max_discard_sectors); - blk_queue_max_write_zeroes_sectors(q, max_discard_sectors); + return DASD_FBA_MAX_BLOCKS << block->s2b_shift; } static int dasd_fba_pe_handler(struct dasd_device *device, @@ -789,10 +763,11 @@ static struct dasd_discipline dasd_fba_discipline = { .owner = THIS_MODULE, .name = "FBA ", .ebcname = "FBA ", + .has_discard = true, .check_device = dasd_fba_check_characteristics, .do_analysis = dasd_fba_do_analysis, .pe_handler = dasd_fba_pe_handler, - .setup_blk_queue = dasd_fba_setup_blk_queue, + .max_sectors = dasd_fba_max_sectors, .fill_geometry = dasd_fba_fill_geometry, .start_IO = dasd_start_IO, .term_IO = dasd_term_IO, |