[SCSI] mptfusion: Set max sector count module parameter
The max_sector setting is currently hard-coded in the driver to 8192
sectors (4MB transfers). Using new module parameter, if max_sectors is
specified at load time, the default of 8192 will be overridden.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 7596aec..73229ff 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -92,6 +92,11 @@
module_param(max_lun, int, 0);
MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");
+static int mpt_loadtime_max_sectors = 8192;
+module_param(mpt_loadtime_max_sectors, int, 0);
+MODULE_PARM_DESC(mpt_loadtime_max_sectors,
+ " Maximum sector define for Host Bus Adaptor.Range 64 to 8192 default=8192");
+
static u8 mptsasDoneCtx = MPT_MAX_PROTOCOL_DRIVERS;
static u8 mptsasTaskCtx = MPT_MAX_PROTOCOL_DRIVERS;
static u8 mptsasInternalCtx = MPT_MAX_PROTOCOL_DRIVERS; /* Used only for internal commands */
@@ -5239,6 +5244,21 @@
sh->sg_tablesize = numSGE;
}
+ if (mpt_loadtime_max_sectors) {
+ if (mpt_loadtime_max_sectors < 64 ||
+ mpt_loadtime_max_sectors > 8192) {
+ printk(MYIOC_s_INFO_FMT "Invalid value passed for"
+ "mpt_loadtime_max_sectors %d."
+ "Range from 64 to 8192\n", ioc->name,
+ mpt_loadtime_max_sectors);
+ }
+ mpt_loadtime_max_sectors &= 0xFFFFFFFE;
+ dprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+ "Resetting max sector to %d from %d\n",
+ ioc->name, mpt_loadtime_max_sectors, sh->max_sectors));
+ sh->max_sectors = mpt_loadtime_max_sectors;
+ }
+
hd = shost_priv(sh);
hd->ioc = ioc;