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Date:   Wed, 29 Nov 2017 11:01:09 +0100
From:   Geert Uytterhoeven <>
To:     Michal Simek <>,
        "David S . Miller" <>
Cc:     Arnd Bergmann <>,,,,,
        Geert Uytterhoeven <>
Subject: [PATCH] net: ethernet: xilinx: Mark XILINX_LL_TEMAC broken on 64-bit

On 64-bit (e.g. powerpc64/allmodconfig):

    drivers/net/ethernet/xilinx/ll_temac_main.c: In function 'temac_start_xmit_done':
    drivers/net/ethernet/xilinx/ll_temac_main.c:633:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
	dev_kfree_skb_irq((struct sk_buff *)cur_p->app4);

cdmac_bd.app4 is u32, so it is too small to hold a kernel pointer.

Note that several other fields in struct cdmac_bd are also too small to
hold physical addresses on 64-bit platforms.

Signed-off-by: Geert Uytterhoeven <>
 drivers/net/ethernet/xilinx/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/xilinx/Kconfig b/drivers/net/ethernet/xilinx/Kconfig
index 6d68c8a8f4f2ac7f..da4ec575ccf9ba4a 100644
--- a/drivers/net/ethernet/xilinx/Kconfig
+++ b/drivers/net/ethernet/xilinx/Kconfig
@@ -34,6 +34,7 @@ config XILINX_AXI_EMAC
 	tristate "Xilinx LL TEMAC (LocalLink Tri-mode Ethernet MAC) driver"
 	depends on (PPC || MICROBLAZE)
+	depends on !64BIT || BROKEN
 	select PHYLIB
 	  This driver supports the Xilinx 10/100/1000 LocalLink TEMAC

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