Add a kernel module parameter for configuring the maximum segment size. This patch enables testing SCSI support for segments smaller than the page size. Cc: Doug Gilbert <dgilbert@xxxxxxxxxxxx> Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx> --- drivers/scsi/scsi_debug.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index bebda917b138..ea8f762c55c3 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -770,6 +770,7 @@ static int sdebug_sector_size = DEF_SECTOR_SIZE; static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY; static int sdebug_virtual_gb = DEF_VIRTUAL_GB; static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; +static unsigned int sdebug_max_segment_size = -1U; static unsigned int sdebug_lbpu = DEF_LBPU; static unsigned int sdebug_lbpws = DEF_LBPWS; static unsigned int sdebug_lbpws10 = DEF_LBPWS10; @@ -5851,6 +5852,7 @@ module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR); module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); +module_param_named(max_segment_size, sdebug_max_segment_size, uint, S_IRUGO); module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); @@ -7815,6 +7817,7 @@ static int sdebug_driver_probe(struct device *dev) sdebug_driver_template.can_queue = sdebug_max_queue; sdebug_driver_template.cmd_per_lun = sdebug_max_queue; + sdebug_driver_template.max_segment_size = sdebug_max_segment_size; if (!sdebug_clustering) sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
