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authorOndrej Zary <linux@rainbow-software.org>2015-02-06 23:11:42 +0100
committerJames Bottomley <JBottomley@Odin.com>2015-04-09 18:08:10 -0700
commit17787a09fdfcb07ccc361758737af0dfa1ea4214 (patch)
treeb8e1f3d4a35800439aa1746b6eea2c111e1eb378 /drivers/scsi/aha1542.c
parentf71429ab535d90806a35bc346adcdebfc8996008 (diff)
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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>
Diffstat (limited to 'drivers/scsi/aha1542.c')
-rw-r--r--drivers/scsi/aha1542.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c
index d15191324b06..161586545804 100644
--- a/drivers/scsi/aha1542.c
+++ b/drivers/scsi/aha1542.c
@@ -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;
}