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aha1542: Simplify aha1542_biosparam 

Simplify aha1542_biosparam, use sector_div, remove unused BIOS_TRANSLATION_1632.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Ondrej Zary 2015-02-06 23:11:42 +01:00 committed by James Bottomley
parent f71429ab53
commit 17787a09fd
1 changed files with 8 additions and 13 deletions
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21
drivers/scsi/aha1542.c
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@ -78,7 +78,6 @@ static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
module_param_array(dma_speed, int, NULL, 0);
MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");
#define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */
#define BIOS_TRANSLATION_6432 1 /* Default case these days */
#define BIOS_TRANSLATION_25563 2 /* Big disk case */
@ -1048,24 +1047,20 @@ static int aha1542_host_reset(Scsi_Cmnd *SCpnt)
}
static int aha1542_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *ip)
struct block_device *bdev, sector_t capacity, int geom[])
{
struct aha1542_hostdata *aha1542 = shost_priv(sdev->host);
int translation_algorithm;
int size = capacity;
translation_algorithm = aha1542->bios_translation;
if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
if (capacity >= 0x200000 &&
aha1542->bios_translation == BIOS_TRANSLATION_25563) {
/* Please verify that this is the same as what DOS returns */
ip[0] = 255;
ip[1] = 63;
ip[2] = size / 255 / 63;
geom[0] = 255; /* heads */
geom[1] = 63; /* sectors */
} else {
ip[0] = 64;
ip[1] = 32;
ip[2] = size >> 11;
geom[0] = 64; /* heads */
geom[1] = 32; /* sectors */
}
geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
return 0;
}