From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 3 Oct 2007 00:00:58 +0000 (+0900)
Subject: [SCSI] megaraid_old: fix READ_CAPACITY
X-Git-Tag: firefly_0821_release~26368^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d5e89385e92a77b2764d9eb8284808a7628cb2a8;p=firefly-linux-kernel-4.4.55.git

[SCSI] megaraid_old: fix READ_CAPACITY

The bulk transfer mode got eleminated by
3f6270ef76f2ce5c134615a470685d6c2a66c07e.  Unfortunately, this mode is
required for READ_CAPACITY commands on certain cards, so put it back
again.  This fixes a boot failure regression reported by Burton
Windle.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 3907f6718ede..da56163c30a8 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -1753,6 +1753,14 @@ mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
 
 	*len = 0;
 
+	if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
+		sg = scsi_sglist(cmd);
+		scb->dma_h_bulkdata = sg_dma_address(sg);
+		*buf = (u32)scb->dma_h_bulkdata;
+		*len = sg_dma_len(sg);
+		return 0;
+	}
+
 	scsi_for_each_sg(cmd, sg, sgcnt, idx) {
 		if (adapter->has_64bit_addr) {
 			scb->sgl64[idx].address = sg_dma_address(sg);