From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "ming.lei@redhat.com" CC: "linux-block@vger.kernel.org" , "jthumshirn@suse.de" , "linux-rdma@vger.kernel.org" , "jgg@mellanox.com" , "hch@lst.de" , "martin.petersen@oracle.com" , "axboe@kernel.dk" , "linux-scsi@vger.kernel.org" , "hare@suse.com" , "dledford@redhat.com" Subject: Re: [PATCH v2 3/4] scsi: Avoid that .queuecommand() gets called for a quiesced SCSI device Date: Fri, 12 Jan 2018 22:45:57 +0000 Message-ID: <1515797155.2396.86.camel@wdc.com> References: <20180110181817.25166-1-bart.vanassche@wdc.com> <20180110181817.25166-4-bart.vanassche@wdc.com> <20180111022341.GA7290@ming.t460p> In-Reply-To: <20180111022341.GA7290@ming.t460p> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gVGh1LCAyMDE4LTAxLTExIGF0IDEwOjIzICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gPiBu b3Qgc3VmZmljaWVudCB0byBwcmV2ZW50IC5xdWV1ZWNvbW1hbmQoKSBjYWxscyBmcm9tIHNjc2lf c2VuZF9laF9jbW5kKCkuDQo+IA0KPiBHaXZlbiBpdCBpcyBlcnJvciBoYW5kbGluZywgZG8gd2Ug bmVlZCB0byBwcmV2ZW50IHRoZSAucXVldWVjb21tYW5kKCkgY2FsbA0KPiBpbiBzY3NpX3NlbmRf ZWhfY21uZCgpPyBDb3VsZCB5b3Ugc2hhcmUgdXMgd2hhdCB0aGUgYWN0dWFsIGlzc3VlDQo+IG9i c2VydmVkIGlzIGZyb20gdXNlciB2aWV3Pw0KDQpQbGVhc2UgaGF2ZSBhIGxvb2sgYXQgdGhlIGtl cm5lbCBidWcgcmVwb3J0IGluIHRoZSBkZXNjcmlwdGlvbiBvZiBwYXRjaCA0LzQgb2YNCnRoaXMg c2VyaWVzLg0KDQo+ID4gSGVuY2Ugc3Vycm91bmQgdGhlIC5xdWV1ZWNvbW1hbmQoKSBjYWxsIGZy b20gdGhlIFNDU0kgZXJyb3IgaGFuZGxlciB3aXRoDQo+ID4gYmxrX3N0YXJ0X3dhaXRfaWZfcXVp ZXNjZWQoKSAvIGJsa19maW5pc2hfd2FpdF9pZl9xdWllc2NlZCgpLg0KPiA+IA0KPiA+IE5vdGU6 IGNvbnZlcnRpbmcgdGhlIC5xdWV1ZWNvbW1hbmQoKSBjYWxsIGluIHNjc2lfc2VuZF9laF9jbW5k KCkgaW50bw0KPiA+IGNvZGUgdGhhdCBjYWxscyBibGtfZ2V0X3JlcXVlc3QoKSwgZS5nLiBzY3Np X2V4ZWN1dGVfcmVxKCksIGlzIG5vdCBhbg0KPiA+IG9wdGlvbiBzaW5jZSBzY3NpX3NlbmRfZWhf Y21uZCgpIGNhbiBiZSBjYWxsZWQgaWYgYWxsIHJlcXVlc3RzIGFyZQ0KPiA+IGFsbG9jYXRlZCBh bmQgaWYgbm8gcmVxdWVzdHMgd2lsbCBtYWtlIHByb2dyZXNzIHdpdGhvdXQgYWJvcnRpbmcgYW55 DQo+ID4gb2YgdGhlc2UgcmVxdWVzdHMuDQo+IA0KPiBJZiB3ZSBuZWVkIHRvIHByZXZlbnQgdGhl IC5xdWV1ZWNvbW1hbmQoKSBpbiBzY3NpX3NlbmRfZWhfY21uZCgpLCB3aGF0DQo+IGRvIHlvdSB0 aGluayBvZiB0aGUgYXBwcm9hY2ggYnkgcmVxdWV1aW5nIHRoZSBFSCBjb21tYW5kIHZpYQ0KPiBz Y3NpX21xX3JlcXVldWVfY21kKCkvc2NzaV9yZXF1ZXVlX2NtZCgpPyBBbmQgdGhlIEVIIHJlcXVl c3Qgd2lsbCBiZQ0KPiBkaXNwYXRjaGVkIGZpbmFsbHkgd2hlbiB0aGUgcXVldWUgYmVjb21lcyB1 bnF1aWVzY2VkIG9yIHRoZSBTVE9QUEVEDQo+IGlzIGNsZWFyZWQuDQoNCkNhbGxpbmcgc2NzaV9t cV9yZXF1ZXVlX2NtZCgpIHdvdWxkIHRyaWdnZXIgc2NzaV9tcV91bmluaXRfY21kKCksDQpibGtf bXFfcHV0X2RyaXZlcl90YWcoKSwgYmxrX21xX2dldF9kcml2ZXJfdGFnKCkgYW5kIHNjc2lfbXFf cHJlcF9mbigpLg0KVGhhdCBjb3VsZCBjYXVzZSBzY3NpX2VoX3NjbWRfYWRkKCkgdG8gYmUgY2Fs bGVkIG11bHRpcGxlIHRpbWVzIGZvciB0aGUNCnNhbWUgU0NTSSBjb21tYW5kLiBIb3dldmVyLCB0 aGF0IHdvdWxkIGJyZWFrIG9uZSBvZiB0aGUgYXNzdW1wdGlvbnMNCnNjc2lfZWhfc2NtZF9hZGQo KSBpcyBiYXNlZCBvbiwgbmFtZWx5IHRoYXQgdGhhdCBmdW5jdGlvbiBnZXRzIGNhbGxlZA0Kb25s eSBvbmNlIHBlciBTQ1NJIGNvbW1hbmQgdGhhdCBpcyBpbiBwcm9ncmVzcy4NCg0KQmFydC4g