From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: driver/dma/ioat: Call del_timer_sync() without holding prep_lock From: Vinod Koul Message-Id: <20180918192041.GG2613@vkoul-mobl> Date: Tue, 18 Sep 2018 12:20:41 -0700 To: Waiman Long Cc: linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Dan Williams , Dave Jiang , Kees Cook , Christophe JAILLET List-ID: T24gMTQtMDktMTgsIDE0OjUzLCBXYWltYW4gTG9uZyB3cm90ZToKPiBUaGUgZm9sbG93aW5nIGxv Y2tkZXAgc3BsYXQgd2FzIG9ic2VydmVkOgo+IAo+IFsgMTIyMi4yNDE3NTBdID09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQo+IFsgMTIyMi4yNzEz MDFdIFdBUk5JTkc6IHBvc3NpYmxlIGNpcmN1bGFyIGxvY2tpbmcgZGVwZW5kZW5jeSBkZXRlY3Rl ZAo+IFsgMTIyMi4zMDEwNjBdIDQuMTYuMC0xMC5lbDgrNS54ODZfNjQrZGVidWcgIzEgTm90IHRh aW50ZWQKPiBbIDEyMjIuMzI2NjU5XSAtLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0KPiBbIDEyMjIuMzU2NTY1XSBzeXN0ZW1kLXNodXRkb3cvMSBp cyB0cnlpbmcgdG8gYWNxdWlyZSBsb2NrOgo+IFsgMTIyMi4zODI2NjBdICAoKCZpb2F0X2NoYW4t PnRpbWVyKSl7Ky4tLn0sIGF0OiBbPDAwMDAwMDAwZjcxZTFhMjg+XSBkZWxfdGltZXJfc3luYysw eDUvMHhmMAo+IFsgMTIyMi40MjI5MjhdCj4gWyAxMjIyLjQyMjkyOF0gYnV0IHRhc2sgaXMgYWxy ZWFkeSBob2xkaW5nIGxvY2s6Cj4gWyAxMjIyLjQ1MTc0M10gICgmKCZpb2F0X2NoYW4tPnByZXBf bG9jayktPnJsb2NrKXsrLi0ufSwgYXQ6IFs8MDAwMDAwMDA4ZWE5OGIxMj5dIGlvYXRfc2h1dGRv d24rMHg4Ni8weDEwMCBbaW9hdGRtYV0KPiAgICA6Cj4gWyAxMjIzLjUyNDk4N10gQ2hhaW4gZXhp c3RzIG9mOgo+IFsgMTIyMy41MjQ5ODddICAgKCZpb2F0X2NoYW4tPnRpbWVyKSAtLT4gJigmaW9h dF9jaGFuLT5jbGVhbnVwX2xvY2spLT5ybG9jayAtLT4gJigmaW9hdF9jaGFuLT5wcmVwX2xvY2sp LT5ybG9jawo+IFsgMTIyMy41MjQ5ODddCj4gWyAxMjIzLjU5NDA4Ml0gIFBvc3NpYmxlIHVuc2Fm ZSBsb2NraW5nIHNjZW5hcmlvOgo+IFsgMTIyMy41OTQwODJdCj4gWyAxMjIzLjYyMjYzMF0gICAg ICAgIENQVTAgICAgICAgICAgICAgICAgICAgIENQVTEKPiBbIDEyMjMuNjQ1MDgwXSAgICAgICAg LS0tLSAgICAgICAgICAgICAgICAgICAgLS0tLQo+IFsgMTIyMy42Njc0MDRdICAgbG9jaygmKCZp b2F0X2NoYW4tPnByZXBfbG9jayktPnJsb2NrKTsKPiBbIDEyMjMuNjkxNTM1XSAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgbG9jaygmKCZpb2F0X2NoYW4tPmNsZWFudXBfbG9jayktPnJs b2NrKTsKPiBbIDEyMjMuNzI4NjU3XSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgbG9j aygmKCZpb2F0X2NoYW4tPnByZXBfbG9jayktPnJsb2NrKTsKPiBbIDEyMjMuNzY1MTIyXSAgIGxv Y2soKCZpb2F0X2NoYW4tPnRpbWVyKSk7Cj4gWyAxMjIzLjc4NDA5NV0KPiBbIDEyMjMuNzg0MDk1 XSAgKioqIERFQURMT0NLICoqKgo+IFsgMTIyMy43ODQwOTVdCj4gWyAxMjIzLjgxMzQ5Ml0gNCBs b2NrcyBoZWxkIGJ5IHN5c3RlbWQtc2h1dGRvdy8xOgo+IFsgMTIyMy44MzQ2NzddICAjMDogIChy ZWJvb3RfbXV0ZXgpeysuKy59LCBhdDogWzwwMDAwMDAwMDU2ZDMzNDU2Pl0gU1lTQ19yZWJvb3Qr MHgxMGYvMHgzMDAKPiBbIDEyMjMuODczMzEwXSAgIzE6ICAoJmRldi0+bXV0ZXgpey4uLi59LCBh dDogWzwwMDAwMDAwMDI1OGRmZGQ3Pl0gZGV2aWNlX3NodXRkb3duKzB4MWM4LzB4NjYwCj4gWyAx MjIzLjkxMzYwNF0gICMyOiAgKCZkZXYtPm11dGV4KXsuLi4ufSwgYXQ6IFs8MDAwMDAwMDA2ODMz MTE0Nz5dIGRldmljZV9zaHV0ZG93bisweDFkNi8weDY2MAo+IFsgMTIyMy45NTQwMDBdICAjMzog ICgmKCZpb2F0X2NoYW4tPnByZXBfbG9jayktPnJsb2NrKXsrLi0ufSwgYXQ6IFs8MDAwMDAwMDA4 ZWE5OGIxMj5dIGlvYXRfc2h1dGRvd24rMHg4Ni8weDEwMCBbaW9hdGRtYV0KPiAKPiBJbiB0aGUg aW9hdF9zaHV0ZG93bigpIGZ1bmN0aW9uOgo+IAo+IAlzcGluX2xvY2tfYmgoJmlvYXRfY2hhbi0+ cHJlcF9sb2NrKTsKPiAJc2V0X2JpdChJT0FUX0NIQU5fRE9XTiwgJmlvYXRfY2hhbi0+c3RhdGUp Owo+IAlkZWxfdGltZXJfc3luYygmaW9hdF9jaGFuLT50aW1lcik7Cj4gCXNwaW5fdW5sb2NrX2Jo KCZpb2F0X2NoYW4tPnByZXBfbG9jayk7Cj4gCj4gQWNjb3JkaW5nIHRvIHRoZSBzeW5jaHJvbml6 YXRpb24gcnVsZSBmb3IgdGhlIGRlbF90aW1lcl9zeW5jKCkgZnVuY3Rpb24sCj4gdGhlIGNhbGxl ciBtdXN0IG5vdCBob2xkIGxvY2tzIHdoaWNoIHdvdWxkIHByZXZlbnQgY29tcGxldGlvbiBvZiB0 aGUKPiB0aW1lcidzIGhhbmRsZXIuCj4gCj4gVGhlIHRpbWVyIHN0cnVjdHVyZSBoYXMgaXRzIG93 biBsb2NrIHRoYXQgbWFuYWdlcyBpdHMgc3luY2hyb25pemF0aW9uLgo+IFNldHRpbmcgdGhlIElP QVRfQ0hBTl9ET1dOIGJpdCBzaG91bGQgcHJldmVudCBvdGhlciBDUFVzIGZyb20KPiB0cnlpbmcg dG8gdXNlIHRoYXQgZGV2aWNlIGFueXdheSwgdGhlcmUgaXMgcHJvYmFibHkgbm8gbmVlZCB0byBj YWxsCj4gZGVsX3RpbWVyX3N5bmMoKSB3aGlsZSBob2xkaW5nIHRoZSBwcmVwX2xvY2suIFNvIHRo ZSBkZWxfdGltZXJfc3luYygpCj4gY2FsbCBpcyBub3cgbW92ZWQgb3V0c2lkZSBvZiB0aGUgcHJl cF9sb2NrIGNyaXRpY2FsIHNlY3Rpb24gdG8gcHJldmVudAo+IHRoZSBjaXJjdWxhciBsb2NrIGRl cGVuZGVuY3kuCgpBcHBsaWVkLCB0aGFua3MK