linux-kernel - [PATCH 3.12 074/182] SCSI: arcmsr: upper 32 of dma address lost

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Message-Id: <dfc6d2acb33aa5f26e836e8b02ca1ba5a0024aed.1399973152.git.jslaby@suse.cz>
Date:	Tue, 13 May 2014 11:27:06 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	James Bottomley <JBottomley@...allels.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 074/182] SCSI: arcmsr: upper 32 of dma address lost

From: Dan Carpenter <dan.carpenter@...cle.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit e2c70425f05219b142b3a8a9489a622c736db39d upstream.

The original code always set the upper 32 bits to zero because it was
doing a shift of the wrong variable.

Fixes: 1a4f550a09f8 ('[SCSI] arcmsr: 1.20.00.15: add SATA RAID plus other fixes')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/scsi/arcmsr/arcmsr_hba.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 278c9fa62067..1822cb9ec623 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -2501,16 +2501,15 @@ static int arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
 static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
 {
 	uint32_t cdb_phyaddr, cdb_phyaddr_hi32;
-	dma_addr_t dma_coherent_handle;
+
 	/*
 	********************************************************************
 	** here we need to tell iop 331 our freeccb.HighPart
 	** if freeccb.HighPart is not zero
 	********************************************************************
 	*/
-	dma_coherent_handle = acb->dma_coherent_handle;
-	cdb_phyaddr = (uint32_t)(dma_coherent_handle);
-	cdb_phyaddr_hi32 = (uint32_t)((cdb_phyaddr >> 16) >> 16);
+	cdb_phyaddr = lower_32_bits(acb->dma_coherent_handle);
+	cdb_phyaddr_hi32 = upper_32_bits(acb->dma_coherent_handle);
 	acb->cdb_phyaddr_hi32 = cdb_phyaddr_hi32;
 	/*
 	***********************************************************************
-- 
1.9.3

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