linux-kernel - [PATCH 2/2] tpm_crb: fix address space of the return pointer in crb_map

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Date:	Fri, 17 Jun 2016 16:39:29 +0200
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Peter Huewe <peterhuewe@....de>
Cc:	linux-security-module@...r.kernel.org,
	Stefan Berger <stefanb@...ux.vnet.ibm.com>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	tpmdd-devel@...ts.sourceforge.net (moderated list:TPM DEVICE DRIVER),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] tpm_crb: fix address space of the return pointer in crb_map_res()

When running make C=2 M=drivers/char/tpm/

  CHECK   drivers/char/tpm//tpm_crb.c
drivers/char/tpm//tpm_crb.c:248:31: warning: incorrect type in return expression (different address spaces)
drivers/char/tpm//tpm_crb.c:248:31:    expected void [noderef] <asn:2>*
drivers/char/tpm//tpm_crb.c:248:31:    got void *

Fixes: 1bd047be37d9 ("tpm_crb: Use devm_ioremap_resource")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
---
 drivers/char/tpm/tpm_crb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 1547636..1b8e1b5 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -245,7 +245,7 @@ static void __iomem *crb_map_res(struct device *dev, struct crb_priv *priv,
 
 	/* Detect a 64 bit address on a 32 bit system */
 	if (start != new_res.start)
-		return ERR_PTR(-EINVAL);
+		return (void __iomem *) ERR_PTR(-EINVAL);
 
 	if (!resource_contains(io_res, &new_res))
 		return devm_ioremap_resource(dev, &new_res);
-- 
2.7.4