linux-kernel - [PATCH] [SCSI] aacraid: silence two GCC warnings

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Date:	Sat, 09 Feb 2013 21:09:21 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Adaptec OEM Raid Solutions <aacraid@...ptec.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [SCSI] aacraid: silence two GCC warnings

Compiling src.o for a 32 bit system triggers two GCC warnings:
    drivers/scsi/aacraid/src.c: In function ‘aac_src_deliver_message’:
    drivers/scsi/aacraid/src.c:410:3: warning: right shift count >= width of type [enabled by default]
    drivers/scsi/aacraid/src.c:434:2: warning: right shift count >= width of type [enabled by default]

Silence these warnings by casting the 'address' variable (of type
dma_addr_t) to u64 on those two lines.

Signed-off-by: Paul Bolle <pebolle@...cali.nl>
---
0) Compile tested only.

1) Changing '0L' to 'OUL' might be a bit of cargo cult programming. I
doubt it's necessary. Members of that cult might also change
'0xffffffff' to '0xffffffffUL', but I didn't.

 drivers/scsi/aacraid/src.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c
index 3b021ec..dfa8a37 100644
--- a/drivers/scsi/aacraid/src.c
+++ b/drivers/scsi/aacraid/src.c
@@ -407,7 +407,7 @@ static int aac_src_deliver_message(struct fib *fib)
 		fib->hw_fib_va->header.StructType = FIB_MAGIC2;
 		fib->hw_fib_va->header.SenderFibAddress = (u32)address;
 		fib->hw_fib_va->header.u.TimeStamp = 0;
-		BUG_ON((u32)(address >> 32) != 0L);
+		BUG_ON(((u64)address >> 32) != 0UL);
 		address |= fibsize;
 	} else {
 		/* Calculate the amount to the fibsize bits */
@@ -431,7 +431,7 @@ static int aac_src_deliver_message(struct fib *fib)
 		address |= fibsize;
 	}
 
-	src_writel(dev, MUnit.IQ_H, (address >> 32) & 0xffffffff);
+	src_writel(dev, MUnit.IQ_H, ((u64)address >> 32) & 0xffffffff);
 	src_writel(dev, MUnit.IQ_L, address & 0xffffffff);
 
 	return 0;
-- 
1.8.1.2

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