Commit 529e7a62 authored by Ed Lin's avatar Ed Lin Committed by James Bottomley
Browse files

[SCSI] stex: adjust default queue length 



Firmware of new version may adjust default queue length. It is
backward compatible.

Signed-off-by: default avatarEd Lin <ed.lin@promise.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 47c4f997

drivers/scsi/stex.c

+10 −1
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ enum { 


	MU_MAX_DELAY_TIME			= 240000,

	MU_HANDSHAKE_SIGNATURE			= 0x55aaaa55,

	MU_HANDSHAKE_SIGNATURE_HALF		= 0x5a5a0000,

	HMU_PARTNER_TYPE			= 2,



	/* firmware returned values */
@@ -902,6 +903,7 @@ static int stex_handshake(struct st_hba *hba) 
	void __iomem *base = hba->mmio_base;

	struct handshake_frame *h;

	dma_addr_t status_phys;

	u32 data;

	int i;



	if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
@@ -923,6 +925,13 @@ static int stex_handshake(struct st_hba *hba) 


	udelay(10);



	data = readl(base + OMR1);

	if ((data & 0xffff0000) == MU_HANDSHAKE_SIGNATURE_HALF) {

		data &= 0x0000ffff;

		if (hba->host->can_queue > data)

			hba->host->can_queue = data;

	}



	h = (struct handshake_frame *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);

	h->rb_phy = cpu_to_le32(hba->dma_handle);

	h->rb_phy_hi = cpu_to_le32((hba->dma_handle >> 16) >> 16);
@@ -1234,7 +1243,7 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
	if (err)

		goto out_free_irq;



	err = scsi_init_shared_tag_map(host, ST_CAN_QUEUE);

	err = scsi_init_shared_tag_map(host, host->can_queue);

	if (err) {

		printk(KERN_ERR DRV_NAME "(%s): init shared queue failed\n",

			pci_name(pdev));