[PATCH] powerpc: fix size calculation using resource_size()

The problem is the the calculation should be "end - start + 1" but the
plus one is missing in this calculation.

Fixes: 8626816e905e ("powerpc: add support for MPIC message register API")
Signed-off-by: Dan Carpenter <redacted>
---
Static analysis.  Not tested.

diff --git a/arch/powerpc/sysdev/mpic_msgr.c b/arch/powerpc/sysdev/mpic_msgr.c
index eb69a5186243..280e964e1aa8 100644
--- a/arch/powerpc/sysdev/mpic_msgr.c
+++ b/arch/powerpc/sysdev/mpic_msgr.c

@@ -196,7 +196,7 @@ static int mpic_msgr_probe(struct platform_device *dev)
 
 	/* IO map the message register block. */
 	of_address_to_resource(np, 0, &rsrc);
-	msgr_block_addr = ioremap(rsrc.start, rsrc.end - rsrc.start);
+	msgr_block_addr = ioremap(rsrc.start, resource_size(&rsrc));
 	if (!msgr_block_addr) {
 		dev_err(&dev->dev, "Failed to iomap MPIC message registers");
 		return -EFAULT;

On 08/08/2018 04:57 AM, Dan Carpenter wrote:

The problem is the the calculation should be "end - start + 1" but the
plus one is missing in this calculation.

Fixes: 8626816e905e ("powerpc: add support for MPIC message register API")
Signed-off-by: Dan Carpenter <redacted>
---
Static analysis.  Not tested.

Looks sane to me.

Reviewed-by: Tyrel Datwyler <redacted>

On Wed, 2018-08-08 at 11:57:24 UTC, Dan Carpenter wrote:

The problem is the the calculation should be "end - start + 1" but the
plus one is missing in this calculation.

Fixes: 8626816e905e ("powerpc: add support for MPIC message register API")
Signed-off-by: Dan Carpenter <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/c42d3be0c06f0c1c416054022aa535

cheers