[SCSI] Bogus disk geometry on large disks
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>
diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c
index b78354f..cd68a66 100644
--- a/drivers/scsi/scsicam.c
+++ b/drivers/scsi/scsicam.c
@@ -57,6 +57,7 @@
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 @@
(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 */