linux-kernel - Re: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support

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Message-ID: <20230823061904.GC3737@thinkpad>
Date:   Wed, 23 Aug 2023 11:49:04 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Krishna chaitanya chundru <quic_krichai@...cinc.com>,
        manivannan.sadhasivam@...aro.org, oe-kbuild-all@...ts.linux.dev,
        helgaas@...nel.org, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_vbadigan@...cinc.com, quic_nitegupt@...cinc.com,
        quic_skananth@...cinc.com, quic_ramkri@...cinc.com,
        quic_parass@...cinc.com, krzysztof.kozlowski@...aro.org,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support

On Wed, Aug 02, 2023 at 01:14:44PM +0800, kernel test robot wrote:
> Hi Krishna,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on pci/next]
> [also build test WARNING on pci/for-linus linus/master v6.5-rc4 next-20230801]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Krishna-chaitanya-chundru/PCI-endpoint-Add-D-state-change-notifier-support/20230802-115309
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
> patch link:    https://lore.kernel.org/r/1690948281-2143-2-git-send-email-quic_krichai%40quicinc.com
> patch subject: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support
> config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/config)
> compiler: loongarch64-linux-gcc (GCC) 12.3.0
> reproduce: (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308021312.obgu7FWM-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/pci/endpoint/pci-epc-core.c:795:6: warning: no previous prototype for 'pci_epc_dstate_notity' [-Wmissing-prototypes]
>      795 | void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state)

This tells that you haven't build tested the series before sending. Please
always do both build and functionality testing before sending each iteration.

- Mani

>          |      ^~~~~~~~~~~~~~~~~~~~~
> 
> 
> vim +/pci_epc_dstate_notity +795 drivers/pci/endpoint/pci-epc-core.c
> 
>    785	
>    786	/**
>    787	 * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state
>    788	 *			has changed
>    789	 * @epc: the EPC device which has change in D-state
>    790	 * @state: the changed D-state
>    791	 *
>    792	 * Invoke to Notify the EPF device that the EPC device has D-state has
>    793	 * changed.
>    794	 */
>  > 795	void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state)
>    796	{
>    797		struct pci_epf *epf;
>    798	
>    799		if (!epc || IS_ERR(epc))
>    800			return;
>    801	
>    802		mutex_lock(&epc->list_lock);
>    803		list_for_each_entry(epf, &epc->pci_epf, list) {
>    804			mutex_lock(&epf->lock);
>    805			if (epf->event_ops && epf->event_ops->dstate_notify)
>    806				epf->event_ops->dstate_notify(epf, state);
>    807			mutex_unlock(&epf->lock);
>    808		}
>    809		mutex_unlock(&epc->list_lock);
>    810	}
>    811	EXPORT_SYMBOL_GPL(pci_epc_dstate_notity);
>    812	
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki

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