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: MUSB interrupt storm on device removal From: Bin Liu Message-Id: <20190123140947.GA18982@uda0271908> Date: Wed, 23 Jan 2019 08:09:47 -0600 To: Johan Hovold Cc: Greg KH , =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= , linux-usb@vger.kernel.org List-ID: T24gV2VkLCBKYW4gMjMsIDIwMTkgYXQgMDk6NTU6NDlBTSArMDEwMCwgSm9oYW4gSG92b2xkIHdy b3RlOgo+IE9uIFdlZCwgSmFuIDIzLCAyMDE5IGF0IDA3OjUyOjEyQU0gKzAxMDAsIEdyZWcgS3Jv YWgtSGFydG1hbiB3cm90ZToKPiA+IE9uIFR1ZSwgSmFuIDIyLCAyMDE5IGF0IDAyOjUyOjQ0UE0g LTA2MDAsIEJpbiBMaXUgd3JvdGU6Cj4gPiA+IEhpIEpvaGFuLAo+ID4gPiAKPiA+ID4gT24gVHVl LCBKYW4gMjIsIDIwMTkgYXQgMDI6MTY6MzBQTSAtMDYwMCwgQmluIExpdSB3cm90ZToKPiA+ID4g PiBPbiBUdWUsIEphbiAyMiwgMjAxOSBhdCAwNToxOTozOVBNICswMDAwLCBNw6VucyBSdWxsZ8Ol cmQgd3JvdGU6Cj4gPiA+ID4gPiBCaW4gTGl1IDxiLWxpdUB0aS5jb20+IHdyaXRlczoKPiA+ID4g PiA+IAo+ID4gPiA+ID4gPiBPbiBNb24sIEphbiAyMSwgMjAxOSBhdCAwOToyMDo1MlBNICswMDAw LCBNw6VucyBSdWxsZ8OlcmQgd3JvdGU6Cj4gPiA+ID4gPiA+PiBCaW4gTGl1IDxiLWxpdUB0aS5j b20+IHdyaXRlczoKPiA+ID4gPiA+ID4+IAo+ID4gPiA+ID4gPj4gPiBPbiBGcmksIEphbiAxOCwg MjAxOSBhdCAwODoxNTowMlBNICswMDAwLCBNw6VucyBSdWxsZ8OlcmQgd3JvdGU6Cj4gPiA+ID4g PiA+PiA+PiBCaW4gTGl1IDxiLWxpdUB0aS5jb20+IHdyaXRlczoKPiA+ID4gPiA+ID4+ID4+IAo+ ID4gPiA+ID4gPj4gPj4gPiBPbiBNb24sIERlYyAxNywgMjAxOCBhdCAwOTozNjoxN1BNICswMDAw LCBNw6VucyBSdWxsZ8OlcmQgd3JvdGU6Cj4gPiA+ID4gPiA+PiA+PiA+PiBCaW4gTGl1IDxiLWxp dUB0aS5jb20+IHdyaXRlczoKPiA+ID4gPiA+ID4+ID4+ID4+IAo+ID4gPiA+ID4gPj4gPj4gPj4g PiBPbiBNb24sIERlYyAxNywgMjAxOCBhdCAwNzoxNjowOFBNICswMDAwLCBNw6VucyBSdWxsZ8Ol cmQgd3JvdGU6Cj4gPiA+ID4gPiA+PiA+PiA+PiA+PiBCaW4gTGl1IDxiLWxpdUB0aS5jb20+IHdy aXRlczoKPiA+ID4gPiA+ID4+ID4+ID4+ID4+IAo+ID4gPiA+ID4gPj4gPj4gPj4gPj4gPiBIaSwK PiA+ID4gPiA+ID4+ID4+ID4+ID4+ID4KPiA+ID4gPiA+ID4+ID4+ID4+ID4+ID4gT24gTW9uLCBE ZWMgMTcsIDIwMTggYXQgMDM6MTM6MTJQTSArMDAwMCwgTcOlbnMgUnVsbGfDpXJkIHdyb3RlOgo+ ID4gPiA+ID4gPj4gPj4gPj4gPj4gPj4gSSBoYXZlIGEgc3RyYW5nZSBwcm9ibGVtIHdpdGggdGhl IG11c2IgZHJpdmVyIGluIGhvc3QgbW9kZSBvbiBBTTMzNTgKPiA+ID4gPiA+ID4+ID4+ID4+ID4+ ID4+IChiZWFnbGVib25lKSBoYXJkd2FyZS4gIElmIEkgY29ubmVjdCBhIG11bHRpLXBvcnQgc2Vy aWFsIGFkYXB0ZXIgYW5kCj4gPiA+ID4gPiA+PiA+Cj4gPiA+ID4gPiA+PiA+IElzIHRoaXMgb24g YmVhZ2xlYm9uZSBvciBiZWFnbGVib25lYmxhY2s/Cj4gPiA+ID4gPiA+PiAKPiA+ID4gPiA+ID4+ IFdlJ3ZlIHNlZW4gaXQgd2l0aCBCZWFnbGVib25lIEVuaGFuY2VkIFsxXSBhbmQgQmVhZ2xlQ29y ZSBbMl0gYmFzZWQKPiA+ID4gPiA+ID4+IGRldmljZXMuICBCb3RoIGFyZSBiYXNlZCBvbiB0aGUg QU0zMzU4IGFuZCBtb3N0bHkgY29tcGF0aWJsZSB3aXRoIHRoZQo+ID4gPiA+ID4gPj4gQmVhZ2xl Ym9uZSBCbGFjay4KPiA+ID4gPiA+ID4+IAo+ID4gPiA+ID4gPj4gWzFdIGh0dHBzOi8vZWxpbnV4 Lm9yZy9TYW5DbG91ZF9CZWFnbGVCb25lRW5oYW5jZWQKPiA+ID4gPiA+ID4+IFsyXSBodHRwOi8v YmVhZ2xlY29yZS5jb20vcHJvZHVjdHMvYmNtMXN0ci5odG1sCj4gPiA+ID4gPiA+Cj4gPiA+ID4g PiA+IE9rYXksIG5vdyBJIHNlZSB5b3UgaGF2ZSBhIGh1YiBvbiB0aGUgYm9hcmQuIEkganVzdCBy ZXByb2R1Y2VkIHRoZQo+ID4gPiA+ID4gPiBjb25zb2xlIGxvY2t1cCBhZnRlciBhZGRlZCBhIGh1 YiBpbiBteSBzZXR1cC4gSSB3aWxsIGZpbmQgc29tZSB0aW1lIHRvCj4gPiA+ID4gPiA+IGRlYnVn IHRoaXMuCj4gPiA+ID4gPiA+Cj4gPiA+ID4gPiA+IEZZSSwgdGhlcmUgd2FzIGEgc2ltaWxhciBp c3N1ZSBpbiBhIGZldyB5ZWFycyBhZ28sIHdoaWNoIHdhcyB0aGF0IHRoZQo+ID4gPiA+ID4gPiBo dWIgcm91dGluZSBuZXZlciBnb3QgY2FsbGVkIGR1cmluZyB0aGUgc3Rvcm0gdGhlbiB0aGUgZGV2 aWNlIGRpc2Nvbm5lY3QKPiA+ID4gPiA+ID4gZXZlbnQgbmV2ZXIgZ290IHBvcHVsYXRlZCBmcm9t IHRoZSBodWIgZHJpdmVyLiBJIGFtIHdvbmRlcmluZyBpZiB0aGlzIGlzCj4gPiA+ID4gPiA+IHRo ZSBzYW1lIGlzc3VlIHBvcHMgdXAgYWdhaW4uLi4KPiA+ID4gPiA+IAo+ID4gPiA+ID4gTm93IHRo YXQgeW91IG1lbnRpb25lZCB0aGUgaHViLCBJIHRyaWVkIGNvbm5lY3RpbmcgdGhlIHNlcmlhbCBh ZGFwdGVyIHRvCj4gPiA+ID4gPiB0aGUgT1RHIHBvcnQgKGluIGhvc3QgbW9kZSkgb24gdGhlIEJl YWdsZWJvbmUgRW5oYW5jZWQgKGl0J3Mgbm90Cj4gPiA+ID4gPiBub3JtYWxseSB1c2VkIGluIHRo aXMgcHJvZHVjdCkuICBXaGVuIGNvbm5lY3RlZCBkaXJlY3RseSwgdGhlIGRpc2Nvbm5lY3QKPiA+ ID4gPiA+IGluZGVlZCB3b3JrcyBwcm9wZXJseS4gIFdpdGggYSBodWIgaW4gYmV0d2VlbiwgaXQg YnJlYWtzLgo+ID4gPiA+IAo+ID4gPiA+IFBsZWFzZSB1c2UgdGhlIGZvbGxvd2luZyBoYWNrIGFz IGEgd29ya2Fyb3VuZCBmb3Igbm93LiBJIHdpbGwgdGhpbmsgbW9yZQo+ID4gPiA+IGFib3V0IGl0 Lgo+ID4gPiA+IAo+ID4gPiA+IFJlZ2FyZHMsCj4gPiA+ID4gLUJpbi4KPiA+ID4gPiAKPiA+ID4g PiAtLS0tLS0tLTg8LS0tLS0tLS0tLQo+ID4gPiA+IGRpZmYgZ2l0IGEvZHJpdmVycy91c2IvbXVz Yi9tdXNiX2hvc3QuYyBiL2RyaXZlcnMvdXNiL211c2IvbXVzYl9ob3N0LmMKPiA+ID4gPiBpbmRl eCBiNTljZTlhZDE0Y2UuLjM3MTlmNmQ5YjI2YyAxMDA2NDQKPiA+ID4gPiAtLS0gYS9kcml2ZXJz L3VzYi9tdXNiL211c2JfaG9zdC5jCj4gPiA+ID4gKysrIGIvZHJpdmVycy91c2IvbXVzYi9tdXNi X2hvc3QuYwo+ID4gPiA+IEBAIC0xODExLDcgKzE4MTEsNyBAQCB2b2lkIG11c2JfaG9zdF9yeChz dHJ1Y3QgbXVzYiAqbXVzYiwgdTggZXBudW0pCj4gPiA+ID4gICAgICAgICB9IGVsc2UgaWYgKHJ4 X2NzciAmIE1VU0JfUlhDU1JfSF9FUlJPUikgewo+ID4gPiA+ICAgICAgICAgICAgICAgICBtdXNi X2RiZyhtdXNiLCAiZW5kICVkIFJYIHByb3RvIGVycm9yIiwgZXBudW0pOwo+ID4gPiA+ICAKPiA+ ID4gPiAtICAgICAgICAgICAgICAgc3RhdHVzID0gLUVQUk9UTzsKPiA+ID4gPiArICAgICAgICAg ICAgICAgc3RhdHVzID0gLUVQSVBFOwo+ID4gPiA+ICAgICAgICAgICAgICAgICBtdXNiX3dyaXRl YihlcGlvLCBNVVNCX1JYSU5URVJWQUwsIDApOwo+ID4gPiA+ICAKPiA+ID4gPiAgICAgICAgICAg ICAgICAgcnhfY3NyICY9IH5NVVNCX1JYQ1NSX0hfRVJST1I7Cj4gPiA+IAo+ID4gPiBXaGVuIGEg dXNiIHNlcmlhbCBkZXZpY2UgaXMgZGV0YWNoZWQsIHRoZSBtdXNiIGNvbnRyb2xsZXIgZHJpdmVy IHJldHVybnMKPiA+ID4gLUVQUk9UTyBpbiB1cmIgZ2l2ZWJhY2ssIHRoZW4gdXNiX3NlcmlhbF9n ZW5lcmljX3JlYWRfYnVsa19jYWxsYmFjaygpCj4gPiA+IHJlLXN1Ym1pdCB0aGUgdXJiLCB0aGlz IGNpcmNsZSBjYXVzZXMgaW50ZXJydXB0IHN0b3JtLCBhbmQgdGhlIGh1Ygo+ID4gPiBkcml2ZXIg d29ya3F1ZXVlIG5ldmVyIGdvdCBhIGNoYW5jZSB0byBydW4gdG8gcG9wdWxhdGUgdGhlIGRldmlj ZQo+ID4gPiBkaXNjb25uZWN0IGV2ZW50LCB0aGUgd2hvbGUgY29uc29sZSBsb2NrcyB1cC4gRG8g eW91IHRoaW5rCj4gPiA+IHVzYl9zZXJpYWxfZ2VuZXJpY19yZWFkX2J1bGtfY2FsbGJhY2soKSBz aG91bGQgaGFuZGxlIC1FUFJPVE8gYXMgd2VsbD8KPiA+IAo+ID4gV2h5IGlzIG11c2IgcmV0dXJu aW5nIHRoYXQgZXJyb3I/ICBBY2NvcmRpbmcgdG8gdGhlIGRvY3VtZW50YXRpb24gd2UKPiA+IGhh dmUgYWJvdXQgdGhpcyB0eXBlIG9mIHRoaW5nCj4gPiAoRG9jdW1lbnRhdGlvbi9kcml2ZXItYXBp L3VzYi9lcnJvci1jb2Rlcy5yc3QpLCB0aGF0IHNob3VsZCBvbmx5IGhhcHBlbgo+ID4gaWYgb25l IG9mIHRoZSBmb2xsb3dpbmcganVzdCBvY2N1cmVkOgo+ID4gCS0gYml0c3R1ZmYgZXJyb3IKPiA+ IAktIG5vIHJlc3BvbnNlIHBhY2tldCByZWNlaXZlZCB3aXRoaW4gdGhlIHByZXNjcmliZWQgYnVz Cj4gPiAJICB0dXJuLWFyb3VuZCB0aW1lCj4gPiAJLSB1bmtub3duIFVTQiBlcnJvcgo+IAo+IEJ1 dCB3ZSBhbHNvIGhhdmUgaW4gdGhhdCBmaWxlOgo+IAo+IAlUaGlzIGlzIGFsc28gb25lIG9mIHNl dmVyYWwgY29kZXMgdGhhdCBkaWZmZXJlbnQga2luZHMgb2YgaG9zdAo+IAljb250cm9sbGVyIHVz ZSB0byBpbmRpY2F0ZSBhIHRyYW5zZmVyIGhhcyBmYWlsZWQgYmVjYXVzZSBvZgo+IAlkZXZpY2Ug ZGlzY29ubmVjdC4gIEluIHRoZSBpbnRlcnZhbCBiZWZvcmUgdGhlIGh1YiBkcml2ZXIgc3RhcnRz Cj4gCWRpc2Nvbm5lY3QgcHJvY2Vzc2luZywgZGV2aWNlcyBtYXkgcmVjZWl2ZSBzdWNoIGZhdWx0 IHJlcG9ydHMKPiAJZm9yIGV2ZXJ5IHJlcXVlc3QuCgpZZXMsIGl0IGlzIHN1Y2ggY2FzZSAtIHdo ZW4gYSBodWIgaXMgaW4gdGhlIHRvcG9sb2d5IHRoZSBtdXNiIGNvbnRyb2xsZXIKaXRzZWxmIGRv ZXNuJ3QgcmVwb3J0IHRoZSBkZXZpY2UgZGlzY29ubmVjdCwgaXQgaXMgdGhlIGh1YiB0byBkbyBz by4KRnJvbSB0aGUgbXVzYiBjb250cm9sbGVyJ3MgcGVyc3BlY3RpdmUgdGhlIHVzYiB0cmFuc2Fj dGlvbiBydW5zIGludG8gdGhlClBST1RPIGVycm9yOiB0aGUgY29udHJvbGxlciBzZW50IElOIHRv a2VuIDMgdGltZXMgYnV0IGFsbCBkaWRuJ3QgcmVjZWl2ZQp0aGUgcmVzcG9uc2UgcGFja2V0IChi ZWNhdXNlIHRoZSBkZXZpY2UgaXMgYWxyZWFkeSByZW1vdmVkKSwgc28gdGhlCmNvbnRyb2xsZXIg Z2VuZXJhdGVzIGVycm9yIGludGVycnVwdCwgdGhlbiBtdXNiIGRyaXZlciByZXBvcnRzIHRoZSBQ Uk9UTwplcnJvciB0byB0aGUgdXNiIGNvcmUgYW5kIGNsYXNzIGRyaXZlcnMuCgo+IAo+ID4gVGhh dCdzIG5vdCB3aGF0IGFueSBvdGhlciBob3N0IGNvbnRyb2xsZXIgcmV0dXJucyB3aGVuIGEgZGV2 aWNlIGlzCj4gPiByZW1vdmVkLCBzbyBlaXRoZXIgeW91IGFyZSBnb2luZyB0byBoYXZlIHRvIGZp eCBhbGwgVVNCIGRyaXZlcyBmb3IgdGhpcwo+ID4gaXNzdWUsIG9yIHlvdSBuZWVkIHRvIGZpeCB0 aGUgbXVzYiBkcml2ZXIgdG8gbm90IHNlbmQgdGhpcyBlcnJvciBmb3IKPiA+IHdoZW4gYSBkZXZp Y2UgaXMgcmVtb3ZlZCAoaGludCwgZG8gdGhlIGxhdHRlci4uLikKPiAKPiBSaWdodCwgdGhpcyBu ZWVkcyB0byBiZSBoYW5kbGUgYXQgdGhlIEhDRCBsZXZlbC4KCkFueSByZWFzb24gdXNiX3Nlcmlh bF9nZW5lcmljX3JlYWRfYnVsa19jYWxsYmFjaygpIGRvZXNuJ3QgaGFuZGxlCi1FUFJPVE8gaW4g dGhlIHNhbWUgd2F5IGFzIC1FUElQRT8KIAo+IGR3YzIgZml4ZWQgYSBzaW1pbGFyIGxvY2t1cCBp c3N1ZSBkdWUgdG8gcmV0cmllZCBOQUtlZCB0cmFuc2FjdGlvbiBieQo+IG5vdCByZXRyeWluZyBp bW1lZGlhdGVseToKPiAKPiAJMzhkMmI1ZmI3NWMxICgidXNiOiBkd2MyOiBob3N0OiBEb24ndCBy ZXRyeSBOQUtlZCB0cmFuc2FjdGlvbnMgcmlnaHQgYXdheSIpCgpCb3RoIGNhc2VzIGFyZSBhbGwg YWJvdXQgZGV2aWNlIHJlbW92YWwsIGJ1dCB0aGlzIG11c2IgY2FzZSBpcyBzbGlnaHRseQpkaWZm ZXJlbnQgZnJvbSB0aGlzIGR3YzIgY2FzZS4KCkl0IGlzIGFsbCBhYm91dCByZS10cmFuc21pdHRp bmcgd2hpY2ggY2F1c2VzIGludGVycnVwdCBzdG9ybSwgYnV0IGluCnRoaXMgZHdjMiBjYXNlLCBp dCBpcyB0aGUgZHdjMiBkcml2ZXIgZG9pbmcgdGhlIHJlLXRyYW5zbWl0dGluZywgc28gaXQKbWFr ZXMgc2Vuc2UgdG8gZGVsYXkgaXQgaW4gdGhlIGR3YzIgZHJpdmVyIGFzIHRoaXMgcmVmZXJyZWQg cGF0Y2ggZG9lcywKCmJ1dCBpbiB0aGlzIG11c2IgY2FzZSwgbXVzYiBkcml2ZXIgcmVwb3J0cyB0 cmFuc2FjdGlvbiBlcnJvciB0byB0aGUgdXNiCnNlcmlhbCBkcml2ZXIsIHRoZSB1c2Igc2VyaWFs IGRyaXZlciBpc3N1ZXMgdGhlIHJlLXRyYW5zbWl0dGluZyBub3QgdGhlCm11c2IgZHJpdmVyLCBz byBJIGRvbid0IHRoaW5rIHRoZSBkZWxheSBzaG91bGQgYmUgYWRkZWQgaW4gdGhlIG11c2IKZHJp dmVyLgoKUmVnYXJkcywKLUJpbi4K