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: usb: don't offload isochronous urb completions to ksoftirq From: Greg Kroah-Hartman Message-Id: <20180612175242.GA12855@kroah.com> Date: Tue, 12 Jun 2018 19:52:42 +0200 To: Mikulas Patocka Cc: Alan Stern , Ming Lei , USB list , Kernel development list List-ID: T24gVHVlLCBKdW4gMTIsIDIwMTggYXQgMDE6MTk6MjhQTSAtMDQwMCwgTWlrdWxhcyBQYXRvY2th IHdyb3RlOgo+IAo+IAo+IE9uIFR1ZSwgMTIgSnVuIDIwMTgsIEFsYW4gU3Rlcm4gd3JvdGU6Cj4g Cj4gPiBPbiBUdWUsIDEyIEp1biAyMDE4LCBNaWt1bGFzIFBhdG9ja2Egd3JvdGU6Cj4gPiAKPiA+ ID4gPiBIb3cgYWJvdXQgbWFraW5nIHRoZSBzb2Z0aXJxIHRocmVhZCdzIHByaW9yaXR5IGFkanVz dGFibGU/Cj4gPiA+IAo+ID4gPiBCdXQgeW91IHdvdWxkIGhhdmUgdG8gYXJndWUgd2l0aCBzb2Z0 aXJxIG1haW50YWluZXJzIGFib3V0IGl0IC0gYW5kIHlvdSAKPiA+ID4gc2F5IHRoYXQgeW91IGRv bid0IGhhdmUgdGltZSBmb3IgdGhhdC4KPiA+IAo+ID4gQnV0IG1heWJlIF95b3VfIGRvLi4uCj4g Cj4ga3NvZnRpcnFkIGhhcyBwcmlvcml0eSAwIC0gaXQgaXMgbm90IHN1aXRhYmxlIGZvciByZWFs LXRpbWUgdGFza3MsIHN1Y2ggYXMgCj4gYXVkaW8uCj4gCj4gSW4gbXkgb3BpbmlvbiwgaXQgaXMg bXVjaCBlYXNpZXIgdG8gZml4IHRoaXMgaW4gdGhlIGVoY2kgZHJpdmVyIChieSBub3QgCj4gb2Zm bG9hZGluZyBpc29jaHJvbm91cyBjb21wbGV0aW9ucyksIHRoYW4gdG8gZGVzaWduIGEgbmV3IAo+ IHJlYWwtdGltZS1jYXBhYmxlIGtzb2Z0aXJxZC4KCk9rLCBidXQgd2hhdCBoYXBwZW5zIHdoZW4g eW91IHBsdWcgeW91ciBkZXZpY2UgaW50byBhIHhoY2kgY29udHJvbGxlcj8KRG8gd2UgYWxzbyBu ZWVkIHRvIGNoYW5nZSB0aGF0PyAgT25seSB0b3VjaGluZyBhIHNwZWNpZmljIGhvc3QKY29udHJv bGxlciBpcyBub3QgZ29vZCwgeW91IHdpbGwgYmUgcGxheWluZyAid2hhY2sgYSBtb2xlIiBmb3Ig Zm9yZXZlci4KCklzb2MgcGFja2V0cyBhcmUsIGJ5IGRlZmluaXRpb24sIG5vdCBzdXBwb3NlZCB0 byBiZSBndWFyYW50ZWVkIGF0IGFsbC4KU28gaWYgdGhleSBhcmUgInNsb3ciIG9yIGRyb3BwZWQg b3IgZGVsYXllZCBzb21laG93LCB0aGF0J3MgZmluZS4gIFRoZQpzb3VuZCBwcm90b2NvbCBzaG91 bGQgYmUgZmluZSB3aXRoIGl0LgoKTm93IHllcywgaW4gcmVhbGl0eSwgYXMgeW91IGhhdmUgZm91 bmQgb3V0LCB0aGluZ3MgY2FuIGJlICJ0aWdodCIgb24KbG93LXBvd2VyZWQgcHJvY2Vzc29ycyB1 bmRlciBoZWF2eSBsb2FkLiAgQnV0IHdoYXQgeW91IGFyZSBkb2luZyBoZXJlIGlzCmEgcHJpb3Jp dHkgaW52ZXJzaW9uLiAgWW91IGRvIG5vdCBzb2x2ZSBzdWNoIGEgdGhpbmcgYnkgZ29pbmcgYXJv dW5kIGFuZApyYWlzaW5nIGV2ZXJ5dGhpbmcgZWxzZSB1cCBhcyB3ZWxsLCB0aGlzIGlzIHN1cHBv c2VkIHRvIGJlIGEgImdlbmVyYWwKcHVycG9zZSIga2VybmVsLiAgWW91IGNhbiB0dW5lIGEgc3Bl Y2lmaWMgbWFjaGluZS9kZXZpY2UganVzdCBmaW5lIHRoaXMKd2F5LCBidXQgbm90IGJ5IG1lc3Np bmcgd2l0aCB0aGUga2VybmVsIGZvciB0aGUgbW9zdCBwYXJ0LgoKPiA+ID4gPiBBcyBmb3IgY29v cmRpbmF0aW5nIHdpdGggdGhlIHNvZnRpcnEgbWFpbnRhaW5lcnMgLS0gd2hldGhlciBJIHdhbnQg dG8gCj4gPiA+ID4gb3Igbm90IGlzbid0IHRoZSBpc3N1ZS4gIFJpZ2h0IG5vdyBJIGRvbid0IGhh dmUgX3RpbWVfIHRvIGRvIGl0Lgo+ID4gPiA+IAo+ID4gPiA+IEFsYW4gU3Rlcm4KPiA+ID4gCj4g PiA+IEkgYW0gd29uZGVyaW5nIC0gd2hhdHMgdGhlIHB1cnBvc2Ugb2YgdGhhdCBwYXRjaCAKPiA+ ID4gNDI4YWFjOGE4MTA1OGUyMzAzNjc3YThmYmYyNjY3MDIyOWU1MWQzYSBhdCBhbGw/IFRoZSBw YXRjaCBzaG93cyBzb21lIAo+ID4gPiBwZXJmb3JtYW5jZSBkaWZmZXJlbmNlLCBidXQgdGhleSBh cmUgbWlub3IsIGFib3V0IDElLgo+ID4gPiAKPiA+ID4gSWYgeW91IHdhbnQgdG8gY2FsbCB0aGUg dXJiIGNhbGxiYWNrIGFzIHNvb24gYXMgcG9zc2libGUgLSB3aHkgZG9uJ3QgeW91IAo+ID4gPiBq dXN0IGNhbGwgaXQ/IFdoeSBkbyB5b3UgbmVlZCB0byBvZmZsb2FkIHRoZSBjYWxsYmFjayB0byBh IHNvZnRpcnEgdGhyZWFkPwo+ID4gCj4gPiBQbGVhc2UgcmVhZCB0aGUgQ2hhbmdlbG9nIGVudHJ5 IGZvciBjb21taXQgOTRkZmQ3ZWRmZDVjLiAgQmFzaWNhbGx5IHRoZSAKPiA+IGlkZWEgd2FzIHRv IHJlZHVjZSBvdmVyYWxsIGxhdGVuY3kgYnkgbm90IGRvaW5nIGFzIG11Y2ggd29yayBpbiBhbiAK PiA+IGludGVycnVwdCBoYW5kbGVyLgo+ID4gCj4gPiBBbGFuIFN0ZXJuCj4gCj4gc25kX2NvbXBs ZXRlX3VyYiBpcyBkb2luZyBub3RoaW5nIGJ1dCBzdWJtaXR0aW5nIHRoZSBzYW1lIHVyYiBhZ2Fp bi4gSXMgCj4gcmVzdWJtaXR0aW5nIHRoZSB1cmIgcmVhbGx5IGNhdXNpbmcgc28gbXVjaCBsYXRl bmN5IHRoYXQgeW91IGNhbid0IGRvIGl0IAo+IGluIHRoZSBpbnRlcnJ1cHQgaGFuZGxlcj8KCnNu ZF9jb21wbGV0ZV91cmIoKSBkb2VzIG11Y2ggbW9yZSB0aGFuIGp1c3Qgc3VibWl0aW9uIG9mIHRo ZSBzYW1lIHVyYi4KUGVyaGFwcyBpZiB0aGlzIGlzIGEgcmVhbCBwcm9ibGVtLCB0aGUgc291bmQg ZHJpdmVyIHNob3VsZCBoYXZlIG1vcmUKdGhhbiBvbmUgdXJiIHBlbmRpbmc/ICBJcyB0aGVyZSBh IHBvb2wgaGVyZSB0aGF0IGlzIHNvbWVob3cgZ2V0dGluZyB1c2VkCnVwPwoKdGhhbmtzLAoKZ3Jl ZyBrLWgKLS0tClRvIHVuc3Vic2NyaWJlIGZyb20gdGhpcyBsaXN0OiBzZW5kIHRoZSBsaW5lICJ1 bnN1YnNjcmliZSBsaW51eC11c2IiIGluCnRoZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRv bW9Admdlci5rZXJuZWwub3JnCk1vcmUgbWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtl cm5lbC5vcmcvbWFqb3Jkb21vLWluZm8uaHRtbAo=