From c146f3d191147a12d6c9ac61c4e48ac2dc53edc0 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Thu, 8 Aug 2024 09:16:48 +0200 Subject: net: fs_enet: Fix warning due to wrong type Building fs_enet on powerpc e500 leads to following warning: CC drivers/net/ethernet/freescale/fs_enet/mac-scc.o In file included from ./include/linux/build_bug.h:5, from ./include/linux/container_of.h:5, from ./include/linux/list.h:5, from ./include/linux/module.h:12, from drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': ./include/linux/err.h:28:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 28 | #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) | ^ ./include/linux/compiler.h:77:45: note: in definition of macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ drivers/net/ethernet/freescale/fs_enet/mac-scc.c:138:13: note: in expansion of macro 'IS_ERR_VALUE' 138 | if (IS_ERR_VALUE(fep->ring_mem_addr)) | ^~~~~~~~~~~~ This is due to fep->ring_mem_addr not being a pointer but a DMA address which is 64 bits on that platform while pointers are 32 bits as this is a 32 bits platform with wider physical bus. However, using fep->ring_mem_addr is just wrong because cpm_muram_alloc() returns an offset within the muram and not a physical address directly. So use fpi->dpram_offset instead. Signed-off-by: Christophe Leroy Reviewed-by: Simon Horman Link: https://patch.msgid.link/ec67ea3a3bef7e58b8dc959f7c17d405af0d27e4.1723101144.git.christophe.leroy@csgroup.eu Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/freescale/fs_enet/mac-scc.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'drivers/net/ethernet/freescale/fs_enet') diff --git a/drivers/net/ethernet/freescale/fs_enet/mac-scc.c b/drivers/net/ethernet/freescale/fs_enet/mac-scc.c index a64cb6270515..9e89ac2b6ce3 100644 --- a/drivers/net/ethernet/freescale/fs_enet/mac-scc.c +++ b/drivers/net/ethernet/freescale/fs_enet/mac-scc.c @@ -131,15 +131,14 @@ static int setup_data(struct net_device *dev) static int allocate_bd(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); - const struct fs_platform_info *fpi = fep->fpi; + struct fs_platform_info *fpi = fep->fpi; - fep->ring_mem_addr = cpm_muram_alloc((fpi->tx_ring + fpi->rx_ring) * - sizeof(cbd_t), 8); - if (IS_ERR_VALUE(fep->ring_mem_addr)) + fpi->dpram_offset = cpm_muram_alloc((fpi->tx_ring + fpi->rx_ring) * + sizeof(cbd_t), 8); + if (IS_ERR_VALUE(fpi->dpram_offset)) return -ENOMEM; - fep->ring_base = (void __iomem __force*) - cpm_muram_addr(fep->ring_mem_addr); + fep->ring_base = cpm_muram_addr(fpi->dpram_offset); return 0; } @@ -147,9 +146,10 @@ static int allocate_bd(struct net_device *dev) static void free_bd(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); + const struct fs_platform_info *fpi = fep->fpi; if (fep->ring_base) - cpm_muram_free(fep->ring_mem_addr); + cpm_muram_free(fpi->dpram_offset); } static void cleanup_data(struct net_device *dev) @@ -247,9 +247,9 @@ static void restart(struct net_device *dev) __fs_out8((u8 __iomem *)ep + i, 0); /* point to bds */ - W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr); + W16(ep, sen_genscc.scc_rbase, fpi->dpram_offset); W16(ep, sen_genscc.scc_tbase, - fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring); + fpi->dpram_offset + sizeof(cbd_t) * fpi->rx_ring); /* Initialize function code registers for big-endian. */ -- cgit