diff options
author | Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> | 2012-06-25 17:35:12 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2012-06-26 06:54:32 (GMT) |
commit | 5cee1d37c9f565f1aa515408863dbb13db67dab9 (patch) | |
tree | 9be17e3476a340f7b3545d87d99d1d853088df2b /drivers | |
parent | 5e7a76be0e48217aff6b6f34bdcce4725db999e2 (diff) | |
download | linux-fsl-qoriq-5cee1d37c9f565f1aa515408863dbb13db67dab9.tar.xz |
net/sh-eth: Check return value of sh_eth_reset when chip reset fail
The sh_eth_reset function resets chip, but this performs nothing when failed.
This changes sh_eth_reset return an error, when this failed in reset.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 88 |
1 files changed, 56 insertions, 32 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 8d696e0..326cb91 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -130,6 +130,8 @@ static struct sh_eth_cpu_data sh_eth_my_cpu_data = { #elif defined(CONFIG_CPU_SUBTYPE_SH7757) #define SH_ETH_HAS_BOTH_MODULES 1 #define SH_ETH_HAS_TSU 1 +static int sh_eth_check_reset(struct net_device *ndev); + static void sh_eth_set_duplex(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); @@ -204,23 +206,19 @@ static void sh_eth_chip_reset_giga(struct net_device *ndev) } static int sh_eth_is_gether(struct sh_eth_private *mdp); -static void sh_eth_reset(struct net_device *ndev) +static int sh_eth_reset(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); - int cnt = 100; + int ret = 0; if (sh_eth_is_gether(mdp)) { sh_eth_write(ndev, 0x03, EDSR); sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR); - while (cnt > 0) { - if (!(sh_eth_read(ndev, EDMR) & 0x3)) - break; - mdelay(1); - cnt--; - } - if (cnt < 0) - printk(KERN_ERR "Device reset fail\n"); + + ret = sh_eth_check_reset(ndev); + if (ret) + goto out; /* Table Init */ sh_eth_write(ndev, 0x0, TDLAR); @@ -238,6 +236,9 @@ static void sh_eth_reset(struct net_device *ndev) sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER, EDMR); } + +out: + return ret; } static void sh_eth_set_duplex_giga(struct net_device *ndev) @@ -310,6 +311,7 @@ static struct sh_eth_cpu_data *sh_eth_get_cpu_data(struct sh_eth_private *mdp) #elif defined(CONFIG_CPU_SUBTYPE_SH7734) || defined(CONFIG_CPU_SUBTYPE_SH7763) #define SH_ETH_HAS_TSU 1 +static int sh_eth_check_reset(struct net_device *ndev); static void sh_eth_reset_hw_crc(struct net_device *ndev); static void sh_eth_chip_reset(struct net_device *ndev) @@ -381,20 +383,16 @@ static struct sh_eth_cpu_data sh_eth_my_cpu_data = { #endif }; -static void sh_eth_reset(struct net_device *ndev) +static int sh_eth_reset(struct net_device *ndev) { - int cnt = 100; + int ret = 0; sh_eth_write(ndev, EDSR_ENALL, EDSR); sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR); - while (cnt > 0) { - if (!(sh_eth_read(ndev, EDMR) & 0x3)) - break; - mdelay(1); - cnt--; - } - if (cnt == 0) - printk(KERN_ERR "Device reset fail\n"); + + ret = sh_eth_check_reset(ndev); + if (ret) + goto out; /* Table Init */ sh_eth_write(ndev, 0x0, TDLAR); @@ -412,6 +410,8 @@ static void sh_eth_reset(struct net_device *ndev) /* Select MII mode */ if (sh_eth_my_cpu_data.select_mii) sh_eth_select_mii(ndev); +out: + return ret; } static void sh_eth_reset_hw_crc(struct net_device *ndev) @@ -422,6 +422,8 @@ static void sh_eth_reset_hw_crc(struct net_device *ndev) #elif defined(CONFIG_ARCH_R8A7740) #define SH_ETH_HAS_TSU 1 +static int sh_eth_check_reset(struct net_device *ndev); + static void sh_eth_chip_reset(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); @@ -433,20 +435,16 @@ static void sh_eth_chip_reset(struct net_device *ndev) sh_eth_select_mii(ndev); } -static void sh_eth_reset(struct net_device *ndev) +static int sh_eth_reset(struct net_device *ndev) { - int cnt = 100; + int ret = 0; sh_eth_write(ndev, EDSR_ENALL, EDSR); sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR); - while (cnt > 0) { - if (!(sh_eth_read(ndev, EDMR) & 0x3)) - break; - mdelay(1); - cnt--; - } - if (cnt == 0) - printk(KERN_ERR "Device reset fail\n"); + + ret = sh_eth_check_reset(ndev); + if (ret) + goto out; /* Table Init */ sh_eth_write(ndev, 0x0, TDLAR); @@ -457,6 +455,9 @@ static void sh_eth_reset(struct net_device *ndev) sh_eth_write(ndev, 0x0, RDFAR); sh_eth_write(ndev, 0x0, RDFXR); sh_eth_write(ndev, 0x0, RDFFR); + +out: + return ret; } static void sh_eth_set_duplex(struct net_device *ndev) @@ -565,11 +566,31 @@ static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd) #if defined(SH_ETH_RESET_DEFAULT) /* Chip Reset */ -static void sh_eth_reset(struct net_device *ndev) +static int sh_eth_reset(struct net_device *ndev) { sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_ETHER, EDMR); mdelay(3); sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER, EDMR); + + return 0; +} +#else +static int sh_eth_check_reset(struct net_device *ndev) +{ + int ret = 0; + int cnt = 100; + + while (cnt > 0) { + if (!(sh_eth_read(ndev, EDMR) & 0x3)) + break; + mdelay(1); + cnt--; + } + if (cnt < 0) { + printk(KERN_ERR "Device reset fail\n"); + ret = -ETIMEDOUT; + } + return ret; } #endif @@ -924,7 +945,9 @@ static int sh_eth_dev_init(struct net_device *ndev) u32 val; /* Soft Reset */ - sh_eth_reset(ndev); + ret = sh_eth_reset(ndev); + if (ret) + goto out; /* Descriptor format */ sh_eth_ring_format(ndev); @@ -998,6 +1021,7 @@ static int sh_eth_dev_init(struct net_device *ndev) netif_start_queue(ndev); +out: return ret; } |