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Thu, 28 Jan 2021 19:57:50 +0200 Received: from hasmsx602.ger.corp.intel.com ([10.184.107.142]) by HASMSX602.ger.corp.intel.com ([10.184.107.142]) with mapi id 15.01.1713.004; Thu, 28 Jan 2021 19:57:50 +0200 From: "Winkler, Tomas" To: Miquel Raynal CC: Richard Weinberger , Vignesh Raghavendra , linux-mtd , linux-kernel Subject: RE: [PATCH] mtd: use refcount to prevent corruption Thread-Topic: [PATCH] mtd: use refcount to prevent corruption Thread-Index: AQHW9OeD00Da249Jw0qJn6+VIZAeUao7z7AAgAAh5BBxoBSOfPxzntFAEGBJdu//fSiMQP//4NkAAA+XK+A= Date: Thu, 28 Jan 2021 17:57:50 +0000 Message-ID: <10c2e98c393a486cab3bc953e9926e38@intel.com> References: <20210127200319.662842-1-tomas.winkler@intel.com> <9732911.325628.1611780400338.JavaMail.zimbra@nod.at> <1776363776.325713.1611782270873.JavaMail.zimbra@nod.at> <1665542284.336646.1611820031174.JavaMail.zimbra@nod.at> <20210128100032.5eb542c6@xps13> In-Reply-To: <20210128100032.5eb542c6@xps13> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 x-originating-ip: [10.184.70.1] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBIaSBUb21hcywNCj4gDQo+ICJXaW5rbGVyLCBUb21hcyIgPHRvbWFzLndpbmtsZXJAaW50ZWwu Y29tPiB3cm90ZSBvbiBUaHUsIDI4IEphbiAyMDIxDQo+IDA4OjUzOjQzICswMDAwOg0KPiANCj4g PiA+IFRvbWFzLA0KPiA+ID4NCj4gPiA+IC0tLS0tIFVyc3Byw7xuZ2xpY2hlIE1haWwgLS0tLS0N Cj4gPiA+ID4+ID4+IENhbiB5b3UgcGxlYXNlIGV4cGxhaW4gYSBsaXR0bGUgbW9yZSB3aGF0IGRl dmljZXMgYXJlIGludm9sdmVkPw0KPiA+ID4gPj4gPj4gRG9lcyBpdCBpbXBsZW1lbnQgX2dldF9k ZXZpY2UoKSBhbmQgX3B1dF9kZXZpY2UoKT8NCj4gPiA+ID4+ID4gTm8gdGhpcyBpcyBub3QgY29u bmVjdGVkIHRvIHRob3NlIGhhbmRsZXJzIG9mIHRoZSB1bmRlcmx5aW5nDQo+ID4gPiA+PiA+IGRl dmljZSBhbmQgdGhvc2Ugd29uJ3QgaGVscC4NCj4gPiA+ID4+ID4gSSBoYXZlIGEgc3BpIGRldmlj ZSBwcm92aWRlZCBieSBNRkQgZnJhbWV3b3JrIHNvIGl0IGNhbiBnbyBhd2F5DQo+IGFueXRpbWUu DQo+ID4gPiA+Pg0KPiA+ID4gPj4gQ2FuIGl0IGdvIGF3YXkgcGh5c2ljYWxseSBvciBqdXN0IGlu IHNvZnR3YXJlPw0KPiA+ID4gPiBTb2Z0d2FyZSwgYnV0IHNpbmNlIHRoaXMgaXMgbWZkIGl0J3Mg YmFzaWNhbGx5IGhvdHBsdWcuIFRoZSBrZXJuZWwNCj4gPiA+ID4gaXMgY3Jhc2hpbmcgd2hlbiBJ IHNpbXVsYXRlIGhhcmR3YXJlIGZhaWx1cmUuDQo+ID4gPiA+Pg0KPiA+ID4gPj4gVXN1YWxseSB0 aGUgcGF0dGVybiBpcyB0aGF0IHlvdSBtYWtlIHN1cmUgaW4gdGhlIGRldmljZSBkcml2ZXINCj4g PiA+ID4+IHRoYXQgbm9ib2R5IGNhbiBvcnBoYW4gdGhlIE1URCB3aGlsZSBpdCBpcyBpbiB1c2Uu DQo+ID4gPiA+PiBlLmcuIGRyaXZlcnMvbXRkL3ViaS9nbHVlYmkuYyBkb2VzIHNvLiBJbiBfZ2V0 X2RldmljZSgpIGl0IGdyYWJzDQo+ID4gPiA+PiBhIHJlZmVyZW5jZSBvbiB0aGUgdW5kZXJseWlu ZyBVQkkgdm9sdW1lIHRvIG1ha2Ugc3VyZSBpdCBjYW5ub3QNCj4gPiA+ID4+IGdvIGF3YXkgd2hp bGUgdGhlIE1URCAob24gdG9wIG9mIFVCSSkgaXMgaW4gdXNlLg0KPiA+ID4gPg0KPiA+ID4gPiBJ IGNhbiB0cnkgdGhhdCBpZiBpdCBoZWxwcywgYmVjYXVzZSB3ZSBhcmUgc2ltdWxhdGluZyBwb3Nz aWJsZQ0KPiA+ID4gPiBsb3dlciBsZXZlbCBjcmFzaC4NCj4gPiA+ID4gSW4gYW4gY2FzZSBJIGJl bGlldmUgdGhhdCB0aGUgcHJvcGVyIHJlZmNvdXRpbmcgaXMgbXVjaCBtb3JlDQo+ID4gPiA+IHJv YnVzdCBzb2x1dGlvbiwgdGhhbiB0aGUgY3VycmVudCBvbmUuDQo+ID4gPiA+IEknZCBhcHByZWNp YXRlIGlmIHNvbWVvbmUgY2FuIHJldmlldyB0aGUgYWN0dWFsIGltcGxlbWVudGF0aW9uLg0KPiA+ ID4NCj4gPiA+IFRoaXMgaGFwcGVucyByaWdodCBub3csIEkgdHJ5IHRvIHVuZGVyc3RhbmQgd2h5 IGV4YWN0bHkgdGhlIGN1cnJlbnQNCj4gPiA+IHdheSBpcyBub3QgZ29vZCBpbiBlbm91Z2guIDot KQ0KPiA+ID4NCj4gPiA+IFlvdXIgYXBwcm9hY2ggbWFrZXMgc3VyZSB0aGF0IHRoZSBNVEQgaXRz ZWxmIGRvZXMgbm90IGdvIGF3YXkgd2hpbGUNCj4gPiA+IGl0IGhhcyB1c2VycyBidXQgaG93IGRv ZXMgdGhpcyBoZWxwIGluIHRoZSBjYXNlIHdoZXJlIHRoZSB1bmRlcmx5aW5nDQo+ID4gPiBNRkQg anVzdCB2YW5pc2hlcz8NCj4gPiA+IFRoZSBNVEQgY2FuIGJlIGluIHVzZSBhbmQgdGhlIE1GRCBj YW4gZ28gYXdheSB3aGlsZSBlLmcuIG10ZF9yZWFkKCkNCj4gPiA+IG9yIHN1Y2ggdGFrZXMgcGxh Y2UuDQo+ID4NCj4gPiBSZWFkIHdpbGwgZmFpbCwgYnV0IGtlcm5lbCB3b24ndCBjcmFzaCBvbiBh Y2Nlc3MgdG8gbWVtb3J5IHRoYXQgd2FzIGZyZWVkLg0KPiANCj4gQXMgUmljaGFyZCB3YXMgc2F5 aW5nLCB3ZSBhcmUgcmVhbGx5IG9wZW4gdG8gZW5oYW5jZSBNVEQgcmVmY291bnRpbmcuDQo+IA0K PiBIb3dldmVyLCB0aGUgaXNzdWUgeW91IGFyZSBmYWNpbmcgaXMsIElNSE8sIG5vdCByZWxhdGVk IHRvIE1URCBidXQgdG8gTUZELg0KPiBUaGVyZSBzaG91bGQgYmUgYSB3YXkgdG8gYXZvaWQgTUZE IHRvIHZhbmlzaCBieSB0YWtpbmcgYSByZWZlcmVuY2Ugb2YgaXQNCj4gdGhyb3VnaCBtdGQtPl9n ZXRfZGV2aWNlKCkuIEkgZG9uJ3QgdGhpbmsgYWRkcmVzc2luZyB0aGUgY2FzZSB3aGVyZSBNRkQN Cj4gdmFuaXNoZXMgd2hpbGUgTVREIChhcyBhIHVzZXIpIGlzIHN0aWxsIGFjdGl2ZSBpcyB0aGUg cmlnaHQgYXBwcm9hY2guDQoNCkkgdGhpbmsgaXQgd29uJ3Qgd29yayBiZWNhdXNlIE1GRCBzdWIt ZHJpdmVyIHJlbW92ZSgpIGlzIGNhbGxlZCAgIGFuZCBpdCBtdXN0IHN1Y2NlZWQgYmVjYXVzZSB0 aGUgbWFpbiBkZXZpY2UgIGlzIG5vdCBhY2Nlc3NpYmxlIHVubGlrZSBnbHVldWJpIHdoaWNoIGp1 c3QgcmV0dXJucyAtRUJVU1kuDQpzbyB3ZSBwb3N0cG9uZSB0aGUgbXRkIHVucmVnaXN0ZXIgdG8g IG10ZF9pbmZvLT5fcHV0X2RldmljZSgpICBidXQgaXQgdGhhdCBzdGF0ZSB3ZSBoYXZlIG5vdGhp bmcgdG8gaG9sZA0Kb24gYXMgdGhlIGRldmljZSBpcyBnb25lIGluIHJlbW92ZSgpDQpVc2VyIHdp bGwgZmFpbCBhbnl3YXksIGFzIHRoZSB1bmRlcmx5aW5nIGRldmljZSBpcyBub3QgZnVuY3Rpb25h bCBpbiB0aGF0IHN0YXRlLg0KQW55d2F5IEkndmUgdHJpZWQgeW91ciBzdWdnZXN0aW9uLCB0aGUg a2VybmVsIGlzIGNyYXNoaW5nLCBob3BlIEkgaGF2ZW4ndCBkb25lIHNvbWUgc2lsbHkgYnVnLg0K DQpUaGFua3MNClRvbWFzDQoNCg0KDQo=