linux-kernel - [PATCH net-next v2 02/10] net: fs_enet: Fix address space and base types mismatches

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Message-ID: <25c7965e6aeeb6bbe1b6be5a3c2c7125182fcb02.1691155346.git.christophe.leroy@csgroup.eu>
Date:   Fri,  4 Aug 2023 15:30:12 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Pantelis Antoniou <pantelis.antoniou@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>, robh@...nel.org
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH net-next v2 02/10] net: fs_enet: Fix address space and base types mismatches

  CHECK   drivers/net/ethernet/freescale/fs_enet/mac-fcc.c
drivers/net/ethernet/freescale/fs_enet/mac-fcc.c:550:9: warning: cast removes address space '__iomem' of expression
drivers/net/ethernet/freescale/fs_enet/mac-fcc.c:550:9: error: subtraction of different types can't work (different address spaces)
  CC      drivers/net/ethernet/freescale/fs_enet/mii-bitbang.o
  CHECK   drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:95:31: warning: incorrect type in argument 1 (different base types)
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:95:31:    expected unsigned int [noderef] [usertype] __iomem *p
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:95:31:    got restricted __be32 [noderef] [usertype] __iomem *dat
...
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:63:31: warning: incorrect type in argument 1 (different base types)
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:63:31:    expected unsigned int [noderef] [usertype] __iomem *p
drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c:63:31:    got restricted __be32 [noderef] [usertype] __iomem *dir
...

Fix those address space and base type mismatches reported by sparse.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 drivers/net/ethernet/freescale/fs_enet/mac-fcc.c     | 2 +-
 drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fs_enet/mac-fcc.c b/drivers/net/ethernet/freescale/fs_enet/mac-fcc.c
index 925428f1b0c8..ce63fd56df89 100644
--- a/drivers/net/ethernet/freescale/fs_enet/mac-fcc.c
+++ b/drivers/net/ethernet/freescale/fs_enet/mac-fcc.c
@@ -547,7 +547,7 @@ static void tx_restart(struct net_device *dev)
 	}
 	/* Now update the TBPTR and dirty flag to the current buffer */
 	W32(ep, fen_genfcc.fcc_tbptr,
-		(uint) (((void *)recheck_bd - fep->ring_base) +
+		(uint)(((void __iomem *)recheck_bd - fep->ring_base) +
 		fep->ring_mem_addr));
 	fep->dirty_tx = recheck_bd;

diff --git a/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c b/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
index 91a69fc2f7c2..f965a2329055 100644
--- a/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
+++ b/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
@@ -29,8 +29,8 @@

 struct bb_info {
 	struct mdiobb_ctrl ctrl;
-	__be32 __iomem *dir;
-	__be32 __iomem *dat;
+	u32 __iomem *dir;
+	u32 __iomem *dat;
 	u32 mdio_msk;
 	u32 mdc_msk;
 };
-- 
2.41.0