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Date: Thu, 22 May 2014 14:16:17 -0700
From: Josh Triplett <josh@...htriplett.org>
To: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Larry Finger <Larry.Finger@...inger.net>,
Manu Gupta <manugupt1@...il.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8188eu: os_dep: usb_intf.c: Fix to remove
null pointer checks that could never happen
On Thu, May 22, 2014 at 09:58:02PM +0200, Rickard Strandqvist wrote:
> Removal of null pointer checks that could never happen
>
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Reviewed-by: Josh Triplett <josh@...htriplett.org>
> drivers/staging/rtl8188eu/os_dep/usb_intf.c | 110 +++++++++++++--------------
> 1 file changed, 52 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
> index 2e49cd5..3454e1b 100644
> --- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c
> +++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
> @@ -396,49 +396,47 @@ int rtw_hw_suspend(struct adapter *padapter)
> goto error_exit;
> }
>
> - if (padapter) { /* system suspend */
> - LeaveAllPowerSaveMode(padapter);
> + /* system suspend */
> + LeaveAllPowerSaveMode(padapter);
>
> - DBG_88E("==> rtw_hw_suspend\n");
> - _enter_pwrlock(&pwrpriv->lock);
> - pwrpriv->bips_processing = true;
> - /* s1. */
> - if (pnetdev) {
> - netif_carrier_off(pnetdev);
> - rtw_netif_stop_queue(pnetdev);
> - }
> + DBG_88E("==> rtw_hw_suspend\n");
> + _enter_pwrlock(&pwrpriv->lock);
> + pwrpriv->bips_processing = true;
> + /* s1. */
> + if (pnetdev) {
> + netif_carrier_off(pnetdev);
> + rtw_netif_stop_queue(pnetdev);
> + }
>
> - /* s2. */
> - rtw_disassoc_cmd(padapter, 500, false);
> + /* s2. */
> + rtw_disassoc_cmd(padapter, 500, false);
>
> - /* s2-2. indicate disconnect to os */
> - {
> - struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
> + /* s2-2. indicate disconnect to os */
> + {
> + struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
>
> - if (check_fwstate(pmlmepriv, _FW_LINKED)) {
> - _clr_fwstate_(pmlmepriv, _FW_LINKED);
> + if (check_fwstate(pmlmepriv, _FW_LINKED)) {
> + _clr_fwstate_(pmlmepriv, _FW_LINKED);
>
> - rtw_led_control(padapter, LED_CTL_NO_LINK);
> + rtw_led_control(padapter, LED_CTL_NO_LINK);
>
> - rtw_os_indicate_disconnect(padapter);
> + rtw_os_indicate_disconnect(padapter);
>
> - /* donnot enqueue cmd */
> - rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 0);
> - }
> + /* donnot enqueue cmd */
> + rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 0);
> }
> - /* s2-3. */
> - rtw_free_assoc_resources(padapter, 1);
> + }
> + /* s2-3. */
> + rtw_free_assoc_resources(padapter, 1);
>
> - /* s2-4. */
> - rtw_free_network_queue(padapter, true);
> - rtw_ips_dev_unload(padapter);
> - pwrpriv->rf_pwrstate = rf_off;
> - pwrpriv->bips_processing = false;
> + /* s2-4. */
> + rtw_free_network_queue(padapter, true);
> + rtw_ips_dev_unload(padapter);
> + pwrpriv->rf_pwrstate = rf_off;
> + pwrpriv->bips_processing = false;
> +
> + _exit_pwrlock(&pwrpriv->lock);
>
> - _exit_pwrlock(&pwrpriv->lock);
> - } else {
> - goto error_exit;
> - }
> return 0;
>
> error_exit:
> @@ -452,35 +450,32 @@ int rtw_hw_resume(struct adapter *padapter)
> struct net_device *pnetdev = padapter->pnetdev;
>
>
> - if (padapter) { /* system resume */
> - DBG_88E("==> rtw_hw_resume\n");
> - _enter_pwrlock(&pwrpriv->lock);
> - pwrpriv->bips_processing = true;
> - rtw_reset_drv_sw(padapter);
> + /* system resume */
> + DBG_88E("==> rtw_hw_resume\n");
> + _enter_pwrlock(&pwrpriv->lock);
> + pwrpriv->bips_processing = true;
> + rtw_reset_drv_sw(padapter);
>
> - if (pm_netdev_open(pnetdev, false) != 0) {
> - _exit_pwrlock(&pwrpriv->lock);
> - goto error_exit;
> - }
> + if (pm_netdev_open(pnetdev, false) != 0) {
> + _exit_pwrlock(&pwrpriv->lock);
> + goto error_exit;
> + }
>
> - netif_device_attach(pnetdev);
> - netif_carrier_on(pnetdev);
> + netif_device_attach(pnetdev);
> + netif_carrier_on(pnetdev);
>
> - if (!netif_queue_stopped(pnetdev))
> - netif_start_queue(pnetdev);
> - else
> - netif_wake_queue(pnetdev);
> + if (!netif_queue_stopped(pnetdev))
> + netif_start_queue(pnetdev);
> + else
> + netif_wake_queue(pnetdev);
>
> - pwrpriv->bkeepfwalive = false;
> - pwrpriv->brfoffbyhw = false;
> + pwrpriv->bkeepfwalive = false;
> + pwrpriv->brfoffbyhw = false;
>
> - pwrpriv->rf_pwrstate = rf_on;
> - pwrpriv->bips_processing = false;
> + pwrpriv->rf_pwrstate = rf_on;
> + pwrpriv->bips_processing = false;
>
> - _exit_pwrlock(&pwrpriv->lock);
> - } else {
> - goto error_exit;
> - }
> + _exit_pwrlock(&pwrpriv->lock);
>
>
> return 0;
> @@ -591,8 +586,7 @@ int rtw_resume_process(struct adapter *padapter)
>
> _enter_pwrlock(&pwrpriv->lock);
> rtw_reset_drv_sw(padapter);
> - if (pwrpriv)
> - pwrpriv->bkeepfwalive = false;
> + pwrpriv->bkeepfwalive = false;
>
> DBG_88E("bkeepfwalive(%x)\n", pwrpriv->bkeepfwalive);
> if (pm_netdev_open(pnetdev, true) != 0)
> --
> 1.7.10.4
>
--
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