The current magic number is shared with mptsas driver. This to be unique to fix issues with register_ioctls32_conversion in older kernels. We are making this change across all versions of the sas2.0 drivers. Signed-off-by: Eric Moore <eric.moore@xxxxxxx> diff -uaprN a/drivers/scsi/mpt2sas/mpt2sas_ctl.h b/drivers/scsi/mpt2sas/mpt2sas_ctl.h --- a/drivers/scsi/mpt2sas/mpt2sas_ctl.h 2009-04-09 16:45:18.000000000 -0600 +++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.h 2009-04-09 16:45:31.000000000 -0600 @@ -50,7 +50,7 @@ #endif #define MPT2SAS_DEV_NAME "mpt2ctl" -#define MPT2_MAGIC_NUMBER 'm' +#define MPT2_MAGIC_NUMBER 'L' #define MPT2_IOCTL_DEFAULT_TIMEOUT (10) /* in seconds */ /** -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html