From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: [PATCH 0/2] sd: Fix a deadlock between event checking and device removal Date: Fri, 17 Nov 2017 17:01:24 +0000 Message-ID: <1510938082.2846.23.camel@wdc.com> References: <1479016028.17624.16.camel@linux.vnet.ibm.com> <9500e9b2-2d34-099d-aa90-d38fb3feb02e@sandisk.com> <1510680828.2280.16.camel@sandisk.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from esa6.hgst.iphmx.com ([216.71.154.45]:15396 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751425AbdKQRB1 (ORCPT ); Fri, 17 Nov 2017 12:01:27 -0500 In-Reply-To: Content-Language: en-US Content-ID: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "xjtuwjp@gmail.com" Cc: "jejb@linux.vnet.ibm.com" , "linux-scsi@vger.kernel.org" , "hare@suse.de" , "martin.petersen@oracle.com" , "snitzer@redhat.com" T24gRnJpLCAyMDE3LTExLTE3IGF0IDE2OjE0ICswMTAwLCBKYWNrIFdhbmcgd3JvdGU6DQo+IEkg c3VzcGVjdCBjb3VsZCBiZSBtaXNzaW5nIHJ1biBxdWV1ZSBvciBsb3N0IElPLCBJTUhPIGl0J3Mg dW5saWtlbHkNCj4gYmVsb3cgZGlzayBwcm9iaW5nIGZpeCB0aGUgYnVnLg0KDQpJZiB0aGUgc3lz dGVtIGlzIHN0aWxsIGluIHRoaXMgc3RhdGUgb3IgaWYgeW91IGNhbiByZXByb2R1Y2UgdGhpcyBp c3N1ZSwNCnBsZWFzZSBjb2xsZWN0IGFuZCBhbmFseXplIHRoZSBpbmZvcm1hdGlvbiB1bmRlciAv c3lzL2tlcm5lbC9kZWJ1Zy9ibG9jay4NClRoYXQncyB0aGUgb25seSB3YXkgSSBrbm93IG9mIHRv IHZlcmlmeSB3aGV0aGVyIG9yIG5vdCBhIGxvY2t1cCBoYXMgYmVlbg0KY2F1c2VkIGJ5IGEgbWlz c2luZyBxdWV1ZSBydW4uIElmIHRoZSBmb2xsb3dpbmcgY29tbWFuZCByZXNvbHZlcyB0aGUgbG9j a3VwDQp0aGVuIHRoZSByb290IGNhdXNlIGlzIGRlZmluaXRlbHkgYSBtaXNzaW5nIHF1ZXVlIHJ1 bjoNCg0KZm9yIGYgaW4gL3N5cy9rZXJuZWwvZGVidWcvYmxvY2svKjsgZG8gZWNobyBraWNrID4k Zi9zdGF0ZTsgZG9uZQ0KDQpXaGVuIGFuYWx5emluZyBxdWV1ZSBsb2NrdXBzIGl0J3MgaW1wb3J0 YW50IHRvIGFsc28gaGF2ZSBpbmZvcm1hdGlvbiBhYm91dA0KcmVxdWVzdHMgdGhhdCBoYXZlIGJl ZW4gcXVldWVkIGJ1dCB0aGF0IGhhdmUgbm90IHlldCBiZWVuIHN0YXJ0ZWQuIEknbSB1c2luZw0K dGhlIGZvbGxvd2luZyBwYXRjaCBsb2NhbGx5ICh3aWxsIHNwbGl0IHRoaXMgcGF0Y2ggYW5kIHN1 Ym1pdCBpdCBwcm9wZXJseSB3aGVuDQpJIGhhdmUgdGhlIHRpbWUpOg0KDQpkaWZmIC0tZ2l0IGEv YmxvY2svYmxrLW1xLWRlYnVnZnMuYyBiL2Jsb2NrL2Jsay1tcS1kZWJ1Z2ZzLmMNCmluZGV4IDI5 ZTg0NTE5MzFmZi4uM2M5ZDY0NzkzODY1IDEwMDY0NA0KLS0tIGEvYmxvY2svYmxrLW1xLWRlYnVn ZnMuYw0KKysrIGIvYmxvY2svYmxrLW1xLWRlYnVnZnMuYw0KQEAgLTQwOCw4ICs0MDgsNyBAQCBz dGF0aWMgdm9pZCBoY3R4X3Nob3dfYnVzeV9ycShzdHJ1Y3QgcmVxdWVzdCAqcnEsIHZvaWQgKmRh dGEsIGJvb2wgcmVzZXJ2ZWQpDQogew0KIAljb25zdCBzdHJ1Y3Qgc2hvd19idXN5X3BhcmFtcyAq cGFyYW1zID0gZGF0YTsNCiANCi0JaWYgKGJsa19tcV9tYXBfcXVldWUocnEtPnEsIHJxLT5tcV9j dHgtPmNwdSkgPT0gcGFyYW1zLT5oY3R4ICYmDQotCSAgICB0ZXN0X2JpdChSRVFfQVRPTV9TVEFS VEVELCAmcnEtPmF0b21pY19mbGFncykpDQorCWlmIChibGtfbXFfbWFwX3F1ZXVlKHJxLT5xLCBy cS0+bXFfY3R4LT5jcHUpID09IHBhcmFtcy0+aGN0eCkNCiAJCV9fYmxrX21xX2RlYnVnZnNfcnFf c2hvdyhwYXJhbXMtPm0sDQogCQkJCQkgbGlzdF9lbnRyeV9ycSgmcnEtPnF1ZXVlbGlzdCkpOw0K IH0NCmRpZmYgLS1naXQgYS9kcml2ZXJzL3Njc2kvc2NzaV9kZWJ1Z2ZzLmMgYi9kcml2ZXJzL3Nj c2kvc2NzaV9kZWJ1Z2ZzLmMNCmluZGV4IDAxZjA4YzAzZjJjMS4uNDFkMWUzYTAxNzg2IDEwMDY0 NA0KLS0tIGEvZHJpdmVycy9zY3NpL3Njc2lfZGVidWdmcy5jDQorKysgYi9kcml2ZXJzL3Njc2kv c2NzaV9kZWJ1Z2ZzLmMNCkBAIC03LDEwICs3LDE0IEBADQogdm9pZCBzY3NpX3Nob3dfcnEoc3Ry dWN0IHNlcV9maWxlICptLCBzdHJ1Y3QgcmVxdWVzdCAqcnEpDQogew0KIAlzdHJ1Y3Qgc2NzaV9j bW5kICpjbWQgPSBjb250YWluZXJfb2Yoc2NzaV9yZXEocnEpLCB0eXBlb2YoKmNtZCksIHJlcSk7 DQotCWludCBtc2VjcyA9IGppZmZpZXNfdG9fbXNlY3MoamlmZmllcyAtIGNtZC0+amlmZmllc19h dF9hbGxvYyk7DQotCWNoYXIgYnVmWzgwXTsNCisJaW50IGFsbG9jX21zID0gamlmZmllc190b19t c2VjcyhqaWZmaWVzIC0gY21kLT5qaWZmaWVzX2F0X2FsbG9jKTsNCisJaW50IHRpbWVvdXRfbXMg PSBqaWZmaWVzX3RvX21zZWNzKHJxLT50aW1lb3V0KTsNCisJY29uc3QgdTggKmNvbnN0IGNkYiA9 IFJFQURfT05DRShjbWQtPmNtbmQpOw0KKwljaGFyIGJ1Zls4MF0gPSAiKD8pIjsNCiANCi0JX19z Y3NpX2Zvcm1hdF9jb21tYW5kKGJ1Ziwgc2l6ZW9mKGJ1ZiksIGNtZC0+Y21uZCwgY21kLT5jbWRf bGVuKTsNCi0Jc2VxX3ByaW50ZihtLCAiLCAuY21kPSVzLCAucmV0cmllcz0lZCwgYWxsb2NhdGVk ICVkLiUwM2QgcyBhZ28iLCBidWYsDQotCQkgICBjbWQtPnJldHJpZXMsIG1zZWNzIC8gMTAwMCwg bXNlY3MgJSAxMDAwKTsNCisJaWYgKChjbWQtPmZsYWdzICYgU0NNRF9JTklUSUFMSVpFRCkgJiYg Y2RiKQ0KKwkJX19zY3NpX2Zvcm1hdF9jb21tYW5kKGJ1Ziwgc2l6ZW9mKGJ1ZiksIGNkYiwgY21k LT5jbWRfbGVuKTsNCisJc2VxX3ByaW50ZihtLCAiLCAuY21kPSVzLCAucmV0cmllcz0lZCwgLnRp bWVvdXQ9JWQuJTAzZCwgYWxsb2NhdGVkICVkLiUwM2QgcyBhZ28iLA0KKwkJICAgYnVmLCBjbWQt PnJldHJpZXMsIHRpbWVvdXRfbXMgLyAxMDAwLCB0aW1lb3V0X21zICUgMTAwMCwNCisJCSAgIGFs bG9jX21zIC8gMTAwMCwgYWxsb2NfbXMgJSAxMDAwKTsNCiB9