From: Alan Cox Date: Sun, 25 Jun 2006 08:58:58 +0000 (-0700) Subject: [SCSI] Bogus disk geometry on large disks X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8d55a786febd077f3a0db9f0672dfa1288b452af;p=linux-beck.git [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 Signed-off-by: Andrew Morton Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c index b78354fc4b17..cd68a66c7bb3 100644 --- a/drivers/scsi/scsicam.c +++ b/drivers/scsi/scsicam.c @@ -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 */