From: Dan Carpenter <dan.carpenter@oracle.com>
To: Eugenio Perez Martin <eperezma@redhat.com>
Cc: Stefano Garzarella <sgarzare@redhat.com>,
"Dawar, Gautam" <gautam.dawar@amd.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
Jason Wang <jasowang@redhat.com>,
Zhu Lingshan <lingshan.zhu@intel.com>,
"martinh@xilinx.com" <martinh@xilinx.com>,
"ecree.xilinx@gmail.com" <ecree.xilinx@gmail.com>,
Eli Cohen <elic@nvidia.com>, Parav Pandit <parav@nvidia.com>,
Wu Zongyong <wuzongyong@linux.alibaba.com>,
"dinang@xilinx.com" <dinang@xilinx.com>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Xie Yongji <xieyongji@bytedance.com>,
"lulu@redhat.com" <lulu@redhat.com>,
"martinpo@xilinx.com" <martinpo@xilinx.com>,
"pabloc@xilinx.com" <pabloc@xilinx.com>,
Longpeng <longpeng2@huawei.com>,
"Piotr.Uminski@intel.com" <Piotr.Uminski@intel.com>,
"Kamde, Tanuj" <tanuj.kamde@amd.com>,
Si-Wei Liu <si-wei.liu@oracle.com>,
"habetsm.xilinx@gmail.com" <habetsm.xilinx@gmail.com>,
"lvivier@redhat.com" <lvivier@redhat.com>,
Zhang Min <zhang.min9@zte.com.cn>,
"hanand@xilinx.com" <hanand@xilinx.com>
Subject: Re: [PATCH v3 2/4] vhost-vdpa: introduce STOP backend feature bit
Date: Mon, 30 May 2022 17:27:25 +0300 [thread overview]
Message-ID: <20220530142725.GU2168@kadam> (raw)
In-Reply-To: <20220527073654.GM2168@kadam>
On Fri, May 27, 2022 at 10:36:55AM +0300, Dan Carpenter wrote:
> static void match_pointer(struct expression *ret_value)
> {
> struct symbol *type;
> char *name;
>
> type = cur_func_return_type();
> if (!type || sval_type_max(type).value != 1)
> return;
>
> if (!is_pointer(ret_value))
> return;
>
> name = expr_to_str(ret_value);
> sm_msg("'%s' return pointer cast to bool", name);
> free_string(name);
> }
I found a bug in Smatch with this check. With the Smatch bug fixed then
there is only only place which does a legitimate implied pointer to bool
cast. A different function returns NULL on error instead of false.
drivers/gpu/drm/i915/display/intel_dmc.c:249 intel_dmc_has_payload() 'i915->dmc.dmc_info[0]->payload' return pointer cast to bool
drivers/net/wireless/rndis_wlan.c:1980 rndis_bss_info_update() '(0)' return pointer cast to bool
drivers/net/wireless/rndis_wlan.c:1989 rndis_bss_info_update() '(0)' return pointer cast to bool
drivers/net/wireless/rndis_wlan.c:1995 rndis_bss_info_update() '(0)' return pointer cast to bool
regards,
dan carpenter
next prev parent reply other threads:[~2022-05-30 15:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 10:59 [PATCH v3 0/4] Implement vdpasim stop operation Eugenio Pérez
2022-05-25 10:59 ` [PATCH v3 1/4] vdpa: Add " Eugenio Pérez
2022-05-25 10:59 ` [PATCH v3 2/4] vhost-vdpa: introduce STOP backend feature bit Eugenio Pérez
2022-05-25 11:23 ` Dawar, Gautam
2022-05-26 8:57 ` Eugenio Perez Martin
2022-05-26 9:07 ` Stefano Garzarella
2022-05-26 12:44 ` Eugenio Perez Martin
2022-05-26 13:20 ` Dan Carpenter
2022-05-26 17:00 ` Eugenio Perez Martin
2022-05-26 19:06 ` Dan Carpenter
2022-05-27 6:50 ` Eugenio Perez Martin
2022-05-27 7:36 ` Dan Carpenter
2022-05-27 14:13 ` Dawar, Gautam
2022-05-30 14:27 ` Dan Carpenter [this message]
2022-05-30 15:12 ` Dan Carpenter
2022-05-25 10:59 ` [PATCH v3 3/4] vhost-vdpa: uAPI to stop the device Eugenio Pérez
2022-05-25 14:32 ` kernel test robot
2022-05-25 17:52 ` kernel test robot
2022-05-25 10:59 ` [PATCH v3 4/4] vdpa_sim: Implement stop vdpa op Eugenio Pérez
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