Re: drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download

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* Re: drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware() warn: missing unwind goto?
       [not found] <291c3208-39c1-4eb5-bbca-b1331c346782@kadam.mountain>
@ 2023-06-06 13:34 ` Kalle Valo
  2023-06-07  0:39   ` Ping-Ke Shih
  0 siblings, 1 reply; 2+ messages in thread
From: Kalle Valo @ 2023-06-06 13:34 UTC (permalink / raw)
  To: Dan Carpenter
  Cc: oe-kbuild, Sascha Hauer, lkp, oe-kbuild-all, linux-kernel,
	linux-wireless

Adding linux-wireless, top posting so that the whole report is included.

Dan Carpenter <dan.carpenter@linaro.org> writes:

> Hi Sascha,
>
> First bad commit (maybe != root cause):
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   9561de3a55bed6bdd44a12820ba81ec416e705a7
> commit: 45794099f5e1d7abc5eb07e6eec7e1e5c6cb540d wifi: rtw88: Add
> rtw8822bu chipset support
> config: riscv-randconfig-m031-20230605
> (https://download.01.org/0day-ci/archive/20230605/202306052310.OVhcUjZ3-lkp@intel.com/config)
> compiler: riscv64-linux-gcc (GCC) 12.3.0
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
> | Closes: https://lore.kernel.org/r/202306052310.OVhcUjZ3-lkp@intel.com/
>
> smatch warnings:
> drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware()
> warn: missing unwind goto?
>
> vim +748 drivers/net/wireless/realtek/rtw88/mac.c
>
> 3d8bf50860c7de Yan-Hsuan Chuang 2020-04-24 717 static int
> __rtw_download_firmware(struct rtw_dev *rtwdev,
> 3d8bf50860c7de Yan-Hsuan Chuang 2020-04-24 718 struct rtw_fw_state
> *fw)
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  719  {
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 720 struct rtw_backup_info
> bckp[DLFW_RESTORE_REG_NUM];
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 721 const u8 *data =
> fw->firmware->data;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  722  	u32 size = fw->firmware->size;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  723  	u32 ltecoex_bckp;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  724  	int ret;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  725  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 726 if
> (!check_firmware_size(data, size))
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  727  		return -EINVAL;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  728  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 729 if
> (!ltecoex_read_reg(rtwdev, 0x38, &ltecoex_bckp))
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  730  		return -EBUSY;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  731  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 732 wlan_cpu_enable(rtwdev,
> false);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  733  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 734
> download_firmware_reg_backup(rtwdev, bckp);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 735
> download_firmware_reset_platform(rtwdev);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  736  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 737 ret =
> start_download_firmware(rtwdev, data, size);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  738  	if (ret)
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  739  		goto dlfw_fail;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  740  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 741
> download_firmware_reg_restore(rtwdev, bckp, DLFW_RESTORE_REG_NUM);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  742  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 743
> download_firmware_end_flow(rtwdev);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  744  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  745  	wlan_cpu_enable(rtwdev, true);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  746  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 747 if
> (!ltecoex_reg_write(rtwdev, 0x38, ltecoex_bckp))
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 @748  		return -EBUSY;
>
> All the other error paths goto dlfw_fail;
>
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  749  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 750 ret =
> download_firmware_validate(rtwdev);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  751  	if (ret)
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  752  		goto dlfw_fail;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  753  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  754  	/* reset desc and index */
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  755  	rtw_hci_setup(rtwdev);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  756  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  757  	rtwdev->h2c.last_box_num = 0;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  758  	rtwdev->h2c.seq = 0;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  759  
> 3c519605850890 Yan-Hsuan Chuang 2019-10-02 760
> set_bit(RTW_FLAG_FW_RUNNING, rtwdev->flags);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  761  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  762  	return 0;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  763  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  764  dlfw_fail:
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  765  	/* Disable FWDL_EN */
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 766 rtw_write8_clr(rtwdev,
> REG_MCUFW_CTRL, BIT_MCUFWDL_EN);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 767 rtw_write8_set(rtwdev,
> REG_SYS_FUNC_EN + 1, BIT_FEN_CPUEN);
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  768  
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  769  	return ret;
> e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  770  }

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

^ permalink raw reply	[flat|nested] 2+ messages in thread

* RE: drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware() warn: missing unwind goto?
  2023-06-06 13:34 ` drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware() warn: missing unwind goto? Kalle Valo
@ 2023-06-07  0:39   ` Ping-Ke Shih
  0 siblings, 0 replies; 2+ messages in thread
From: Ping-Ke Shih @ 2023-06-07  0:39 UTC (permalink / raw)
  To: Kalle Valo, Dan Carpenter
  Cc: oe-kbuild@lists.linux.dev, Sascha Hauer, lkp@intel.com,
	oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
	linux-wireless@vger.kernel.org



> -----Original Message-----
> From: Kalle Valo <kvalo@kernel.org>
> Sent: Tuesday, June 6, 2023 9:34 PM
> To: Dan Carpenter <dan.carpenter@linaro.org>
> Cc: oe-kbuild@lists.linux.dev; Sascha Hauer <s.hauer@pengutronix.de>; lkp@intel.com;
> oe-kbuild-all@lists.linux.dev; linux-kernel@vger.kernel.org; linux-wireless@vger.kernel.org
> Subject: Re: drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware() warn: missing unwind
> goto?
> 
> Adding linux-wireless, top posting so that the whole report is included.
> 
> Dan Carpenter <dan.carpenter@linaro.org> writes:
> 
> > Hi Sascha,
> >
> > First bad commit (maybe != root cause):
> >
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   9561de3a55bed6bdd44a12820ba81ec416e705a7
> > commit: 45794099f5e1d7abc5eb07e6eec7e1e5c6cb540d wifi: rtw88: Add
> > rtw8822bu chipset support
> > config: riscv-randconfig-m031-20230605
> > (https://download.01.org/0day-ci/archive/20230605/202306052310.OVhcUjZ3-lkp@intel.com/config)
> > compiler: riscv64-linux-gcc (GCC) 12.3.0
> >
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
> > | Closes: https://lore.kernel.org/r/202306052310.OVhcUjZ3-lkp@intel.com/
> >
> > smatch warnings:
> > drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware()
> > warn: missing unwind goto?
> >
> > vim +748 drivers/net/wireless/realtek/rtw88/mac.c
> >
> > 3d8bf50860c7de Yan-Hsuan Chuang 2020-04-24 717 static int
> > __rtw_download_firmware(struct rtw_dev *rtwdev,
> > 3d8bf50860c7de Yan-Hsuan Chuang 2020-04-24 718 struct rtw_fw_state
> > *fw)
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  719  {
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 720 struct rtw_backup_info
> > bckp[DLFW_RESTORE_REG_NUM];
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 721 const u8 *data =
> > fw->firmware->data;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  722       u32 size = fw->firmware->size;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  723       u32 ltecoex_bckp;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  724       int ret;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  725
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 726 if
> > (!check_firmware_size(data, size))
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  727               return -EINVAL;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  728
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 729 if
> > (!ltecoex_read_reg(rtwdev, 0x38, &ltecoex_bckp))
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  730               return -EBUSY;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  731
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 732 wlan_cpu_enable(rtwdev,
> > false);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  733
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 734
> > download_firmware_reg_backup(rtwdev, bckp);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 735
> > download_firmware_reset_platform(rtwdev);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  736
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 737 ret =
> > start_download_firmware(rtwdev, data, size);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  738       if (ret)
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  739               goto dlfw_fail;
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  740
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 741
> > download_firmware_reg_restore(rtwdev, bckp, DLFW_RESTORE_REG_NUM);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  742
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 743
> > download_firmware_end_flow(rtwdev);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  744
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  745       wlan_cpu_enable(rtwdev, true);
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26  746
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 747 if
> > (!ltecoex_reg_write(rtwdev, 0x38, ltecoex_bckp))
> > e3037485c68ec1 Yan-Hsuan Chuang 2019-04-26 @748               return -EBUSY;
> >
> > All the other error paths goto dlfw_fail;

At this point, the things of 'dlfw_fail:' have been done by
download_firmware_end_flow() and wlan_cpu_enable() at L743 and L745 normally. 
An exception is download_firmware_end_flow() clear BIT_MCUFWDL_EN bit conditionally,
so I think it would be better to goto dlfw_fail. 

I can make a patch for this.

Ping-Ke


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2023-06-07  0:40 UTC | newest]

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     [not found] <291c3208-39c1-4eb5-bbca-b1331c346782@kadam.mountain>
2023-06-06 13:34 ` drivers/net/wireless/realtek/rtw88/mac.c:748 __rtw_download_firmware() warn: missing unwind goto? Kalle Valo
2023-06-07  0:39   ` Ping-Ke Shih

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