From de2e487f0008f38bf3daab476c6234b1a24c8ddc Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 13 Sep 2013 09:44:31 +0300 Subject: [PATCH] staging: silicom: introduce bp_dev_get_idx_bsf() and use it There are two places where duplicate code is located. Moreover, there is a custom implementation of the sscanf() functionality. This patch makes code quite simplier and cleaner. Signed-off-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman --- drivers/staging/silicom/bpctl_mod.c | 188 +++++++--------------------- 1 file changed, 47 insertions(+), 141 deletions(-) diff --git a/drivers/staging/silicom/bpctl_mod.c b/drivers/staging/silicom/bpctl_mod.c index 495272d01348..39dc92a271ab 100644 --- a/drivers/staging/silicom/bpctl_mod.c +++ b/drivers/staging/silicom/bpctl_mod.c @@ -1,11 +1,11 @@ /******************************************************************************/ /* */ -/* Bypass Control utility, Copyright (c) 2005-20011 Silicom */ +/* Bypass Control utility, Copyright (c) 2005-2011 Silicom */ /* */ /* This program is free software; you can redistribute it and/or modify */ /* it under the terms of the GNU General Public License as published by */ /* the Free Software Foundation, located in the file LICENSE. */ -/* Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. */ +/* Copyright(c) 2007 - 2009, 2013 Intel Corporation. All rights reserved. */ /* */ /* */ /******************************************************************************/ @@ -124,80 +124,60 @@ int bp_proc_create(void); int is_bypass_fn(struct bpctl_dev *pbpctl_dev); int get_dev_idx_bsf(int bus, int slot, int func); -static unsigned long str_to_hex(char *p); +static int bp_get_dev_idx_bsf(struct net_device *dev, int *index) +{ + struct ethtool_drvinfo drvinfo = {0}; + char *buf; + int bus, slot, func; + + if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) + dev->ethtool_ops->get_drvinfo(dev, &drvinfo); + else + return -EOPNOTSUPP; + + if (!drvinfo.bus_info) + return -ENODATA; + if (!strcmp(drvinfo.bus_info, "N/A")) + return -ENODATA; + + buf = strchr(drvinfo.bus_info, ':'); + if (!buf) + return -EINVAL; + buf++; + if (sscanf(buf, "%x:%x.%x", &bus, &slot, &func) != 3) + return -EINVAL; + + *index = get_dev_idx_bsf(bus, slot, func); + return 0; +} + static int bp_device_event(struct notifier_block *unused, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); static struct bpctl_dev *pbpctl_dev, *pbpctl_dev_m; int dev_num = 0, ret = 0, ret_d = 0, time_left = 0; + /* printk("BP_PROC_SUPPORT event =%d %s %d\n", event,dev->name, dev->ifindex ); */ /* return NOTIFY_DONE; */ if (!dev) return NOTIFY_DONE; - if (event == NETDEV_REGISTER) { - { - struct ethtool_drvinfo drvinfo; - char cbuf[32]; - char *buf = NULL; - char res[10]; - int i = 0, ifindex, idx_dev = 0; - int bus = 0, slot = 0, func = 0; - ifindex = dev->ifindex; - - memset(res, 0, 10); - memset(&drvinfo, 0, sizeof(struct ethtool_drvinfo)); - - if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) { - memset(&drvinfo, 0, sizeof(drvinfo)); - dev->ethtool_ops->get_drvinfo(dev, &drvinfo); - } else - return NOTIFY_DONE; - if (!drvinfo.bus_info) - return NOTIFY_DONE; - if (!strcmp(drvinfo.bus_info, "N/A")) - return NOTIFY_DONE; - memcpy(&cbuf, drvinfo.bus_info, 32); - buf = &cbuf[0]; - while (*buf++ != ':') - ; - for (i = 0; i < 10; i++, buf++) { - if (*buf == ':') - break; - res[i] = *buf; - - } - buf++; - bus = str_to_hex(res); - memset(res, 0, 10); - - for (i = 0; i < 10; i++, buf++) { - if (*buf == '.') - break; - res[i] = *buf; - - } - buf++; - slot = str_to_hex(res); - func = str_to_hex(buf); - idx_dev = get_dev_idx_bsf(bus, slot, func); - - if (idx_dev != -1) { + if (event == NETDEV_REGISTER) { + int idx_dev; - bpctl_dev_arr[idx_dev].ifindex = ifindex; - bpctl_dev_arr[idx_dev].ndev = dev; + if (bp_get_dev_idx_bsf(dev, &idx_dev)) + return NOTIFY_DONE; - bypass_proc_remove_dev_sd(&bpctl_dev_arr - [idx_dev]); - bypass_proc_create_dev_sd(&bpctl_dev_arr - [idx_dev]); + if (idx_dev == -1) + return NOTIFY_DONE; - } + bpctl_dev_arr[idx_dev].ifindex = dev->ifindex; + bpctl_dev_arr[idx_dev].ndev = dev; - } + bypass_proc_remove_dev_sd(&bpctl_dev_arr[idx_dev]); + bypass_proc_create_dev_sd(&bpctl_dev_arr[idx_dev]); return NOTIFY_DONE; - } if (event == NETDEV_UNREGISTER) { int idx_dev = 0; @@ -5269,36 +5249,6 @@ int get_dev_idx_bsf(int bus, int slot, int func) return -1; } -static void str_low(char *str) -{ - int i; - - for (i = 0; i < strlen(str); i++) - if ((str[i] >= 65) && (str[i] <= 90)) - str[i] += 32; -} - -static unsigned long str_to_hex(char *p) -{ - unsigned long hex = 0; - unsigned long length = strlen(p), shift = 0; - unsigned char dig = 0; - - str_low(p); - length = strlen(p); - - if (length == 0) - return 0; - - do { - dig = p[--length]; - dig = dig < 'a' ? (dig - '0') : (dig - 'a' + 0xa); - hex |= (dig << shift); - shift += 4; - } while (length); - return hex; -} - static int get_dev_idx(int ifindex) { int idx_dev = 0; @@ -5329,70 +5279,26 @@ static struct bpctl_dev *get_dev_idx_p(int ifindex) static void if_scan_init(void) { - int idx_dev = 0; struct net_device *dev; - int ifindex; + /* rcu_read_lock(); */ /* rtnl_lock(); */ /* rcu_read_lock(); */ for_each_netdev(&init_net, dev) { + int idx_dev; - struct ethtool_drvinfo drvinfo; - char cbuf[32]; - char *buf = NULL; - char res[10]; - int i = 0; - int bus = 0, slot = 0, func = 0; - ifindex = dev->ifindex; - - memset(res, 0, 10); - memset(&drvinfo, 0, sizeof(struct ethtool_drvinfo)); - - if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) { - memset(&drvinfo, 0, sizeof(drvinfo)); - dev->ethtool_ops->get_drvinfo(dev, &drvinfo); - } else + if (bp_get_dev_idx_bsf(dev, &idx_dev)) continue; - if (!strcmp(drvinfo.bus_info, "N/A")) - continue; - memcpy(&cbuf, drvinfo.bus_info, 32); - buf = &cbuf[0]; - while (*buf++ != ':') - ; - for (i = 0; i < 10; i++, buf++) { - if (*buf == ':') - break; - res[i] = *buf; - - } - buf++; - bus = str_to_hex(res); - memset(res, 0, 10); - - for (i = 0; i < 10; i++, buf++) { - if (*buf == '.') - break; - res[i] = *buf; - - } - buf++; - slot = str_to_hex(res); - func = str_to_hex(buf); - idx_dev = get_dev_idx_bsf(bus, slot, func); - - if (idx_dev != -1) { - - bpctl_dev_arr[idx_dev].ifindex = ifindex; - bpctl_dev_arr[idx_dev].ndev = dev; - - } + if (idx_dev == -1) + continue; + bpctl_dev_arr[idx_dev].ifindex = dev->ifindex; + bpctl_dev_arr[idx_dev].ndev = dev; } /* rtnl_unlock(); */ /* rcu_read_unlock(); */ - } static long device_ioctl(struct file *file, /* see include/linux/fs.h */ -- 2.39.5