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[SCSI] Bogus disk geometry on large disks

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We currently stuff a truncated size into the geometry logic and return the
result which can produce bizarre reports for a 4Tb array.  Since that
mapping logic isn't useful for disks that big don't try and map this way at
all.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Alan Cox 2006-06-25 01:58:58 -07:00 committed by James Bottomley
parent 3e7196cf60
commit 8d55a786fe
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/scsicam.c
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@ -57,6 +57,7 @@ EXPORT_SYMBOL(scsi_bios_ptable);
int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
{
unsigned char *p;
u64 capacity64 = capacity; /* Suppress gcc warning */
int ret;
p = scsi_bios_ptable(bdev);
@ -68,7 +69,7 @@ int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
(unsigned int *)ip + 0, (unsigned int *)ip + 1);
kfree(p);
if (ret == -1) {
if (ret == -1 && capacity64 < (1ULL << 32)) {
/* pick some standard mapping with at most 1024 cylinders,
and at most 62 sectors per track - this works up to
7905 MB */