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s390/dasd: Make setting queue_max_segments more explicit

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Currently the block queue value max_segments is set to -1L, which
is then implicitly casted to unsigned short in blk_queue_max_segments.
This results in 65535 (64k) max_segments.

Even though the resulting value is correct, setting it implicitly using
-1L is rather confusing. Set the value explicitly using the USHRT_MAX
macro instead.

Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Höppner 2016-06-30 12:58:51 +02:00 committed by Martin Schwidefsky
parent 237d6e6884
commit 5303e6578f
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/block/dasd.c
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@ -3140,7 +3140,7 @@ static void dasd_setup_queue(struct dasd_block *block)
blk_queue_logical_block_size(block->request_queue,
block->bp_block);
blk_queue_max_hw_sectors(block->request_queue, max);
blk_queue_max_segments(block->request_queue, -1L);
blk_queue_max_segments(block->request_queue, USHRT_MAX);
/* with page sized segments we can translate each segement into
* one idaw/tidaw
*/