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Commit 3850b14e authored by kashyap.desai@lsi.com's avatar kashyap.desai@lsi.com Committed by James Bottomley
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[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: default avatarKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 4fcf812c

drivers/message/fusion/mptsas.c

+20 −0
Original line number Diff line number Diff line
@@ -92,6 +92,11 @@ static int max_lun = MPTSAS_MAX_LUN; 
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 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
		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;