lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 07 Oct 2015 08:58:34 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Joe Perches <joe@...ches.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	Jiri Pirko <jiri@...lanox.com>,
	Ido Schimmel <idosch@...lanox.com>,
	linux-kernel@...r.kernel.org, Elad Raz <eladr@...lanox.com>,
	Scott Feldman <sfeldma@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2] mlxsw: fix warnings for big-endian 32-bit dma_addr_t

The recently added mlxsw driver produces warnings in ARM
allmodconfig:

drivers/net/ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cmd_exec':
drivers/net/ethernet/mellanox/mlxsw/pci.c:1585:59: warning: right shift count >= width of type [-Wshift-count-overflow]
linux/byteorder/big_endian.h:38:51: note: in definition of macro '__cpu_to_be32'
drivers/net/ethernet/mellanox/mlxsw/pci.c:76:2: note: in expansion of macro 'iowrite32be'

This uses upper_32_bits() to extract the bits while avoiding that warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Fixes: eda6500a987a "mlxsw: Add PCI bus implementation"
---
I've kept Jiri's Ack despite having in effect a completely different
patch here, as the effect and the changelog is the same for practical purposes.
Hope that's ok.

diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 462cea31ecbb..cef866c37648 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1582,11 +1582,11 @@ static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
 
 	if (in_mbox)
 		memcpy(mlxsw_pci->cmd.in_mbox.buf, in_mbox, in_mbox_size);
-	mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, in_mapaddr >> 32);
-	mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, in_mapaddr);
+	mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, upper_32_bits(in_mapaddr));
+	mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, lower_32_bits(in_mapaddr));
 
-	mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, out_mapaddr >> 32);
-	mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, out_mapaddr);
+	mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, upper_32_bits(out_mapaddr));
+	mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, lower_32_bits(out_mapaddr));
 
 	mlxsw_pci_write32(mlxsw_pci, CIR_IN_MODIFIER, in_mod);
 	mlxsw_pci_write32(mlxsw_pci, CIR_TOKEN, 0);

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists