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author | Arnd Bergmann <arnd@arndb.de> | 2016-11-16 15:07:10 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-02 05:07:53 (GMT) |
commit | 47974403c9caadc9fdb762e399569689efb02386 (patch) | |
tree | 52057d129cafceec54a9fd1e9cb5f9f6a1f8b057 /drivers | |
parent | dd758f82a3bf2f11843a59188cd0d7922dbcc731 (diff) | |
download | linux-47974403c9caadc9fdb762e399569689efb02386.tar.xz |
staging: wilc1000: simplify vif[i]->ndev accesses
commit 735bb39ca3bed8469b3b3a42d8cc57bdb9fc4dd7 upstream.
With gcc-7, I got a new warning for this driver:
wilc1000/linux_wlan.c: In function 'wilc_netdev_cleanup':
wilc1000/linux_wlan.c:1224:15: error: 'vif[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
wilc1000/linux_wlan.c:1224:15: error: 'vif[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
A closer look at the function reveals that it's more complex than
it needs to be, given that based on how the device is created
we always get
netdev_priv(vif->ndev) == vif
Based on this assumption, I found a few other places in the same file
that can be simplified. That code appears to be a relic from times
when the assumption above was not valid.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/staging/wilc1000/linux_wlan.c | 34 |
1 files changed, 9 insertions, 25 deletions
diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c index 6370a5e..defffa7 100644 --- a/drivers/staging/wilc1000/linux_wlan.c +++ b/drivers/staging/wilc1000/linux_wlan.c @@ -269,23 +269,12 @@ static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header) int wilc_wlan_set_bssid(struct net_device *wilc_netdev, u8 *bssid, u8 mode) { - int i = 0; - int ret = -1; - struct wilc_vif *vif; - struct wilc *wilc; - - vif = netdev_priv(wilc_netdev); - wilc = vif->wilc; + struct wilc_vif *vif = netdev_priv(wilc_netdev); - for (i = 0; i < wilc->vif_num; i++) - if (wilc->vif[i]->ndev == wilc_netdev) { - memcpy(wilc->vif[i]->bssid, bssid, 6); - wilc->vif[i]->mode = mode; - ret = 0; - break; - } + memcpy(vif->bssid, bssid, 6); + vif->mode = mode; - return ret; + return 0; } int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc) @@ -1212,16 +1201,11 @@ void WILC_WFI_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size) void wilc_netdev_cleanup(struct wilc *wilc) { - int i = 0; - struct wilc_vif *vif[NUM_CONCURRENT_IFC]; + int i; - if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev)) { + if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev)) unregister_inetaddr_notifier(&g_dev_notifier); - for (i = 0; i < NUM_CONCURRENT_IFC; i++) - vif[i] = netdev_priv(wilc->vif[i]->ndev); - } - if (wilc && wilc->firmware) { release_firmware(wilc->firmware); wilc->firmware = NULL; @@ -1230,7 +1214,7 @@ void wilc_netdev_cleanup(struct wilc *wilc) if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev)) { for (i = 0; i < NUM_CONCURRENT_IFC; i++) if (wilc->vif[i]->ndev) - if (vif[i]->mac_opened) + if (wilc->vif[i]->mac_opened) wilc_mac_close(wilc->vif[i]->ndev); for (i = 0; i < NUM_CONCURRENT_IFC; i++) { @@ -1278,9 +1262,9 @@ int wilc_netdev_init(struct wilc **wilc, struct device *dev, int io_type, vif->idx = wl->vif_num; vif->wilc = *wilc; + vif->ndev = ndev; wl->vif[i] = vif; - wl->vif[wl->vif_num]->ndev = ndev; - wl->vif_num++; + wl->vif_num = i; ndev->netdev_ops = &wilc_netdev_ops; { |