tree b5ff656a99557e05d63f5e2eb16852ace1e8c7a5
parent 26898afd67dfd707aa291648ca731063c8333c7f
author Jeff Mahoney <jeffm@suse.de> 1345317641 -0400
committer James Bottomley <JBottomley@Parallels.com> 1347641969 +0100

[SCSI] st: raise device limit

The device limit of 128 tape drives was established in 2003 as a
significant increase from the 8 tape drives allowed previously.

We're seeing customer sites that between a large number of drives
and multipath are discovering more than 128 devices and running
into problems.

Now that we're not stuck having to store a pointer in array
and aren't limited by kmalloc failing on higher order allocs we can
lift the limit to fill the entire minor range based on the number
of modes.

Based on the current code, that's 2^17 devices.

Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Acked-by: Kai Mäkisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>