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: [v2] usb: host: xhci: Support running urb giveback in tasklet context From: Suwan Kim Message-Id: <20190404121823.GA3793@localhost.localdomain> Date: Thu, 4 Apr 2019 21:18:24 +0900 To: Alan Stern Cc: mathias.nyman@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org List-ID: SGkgQWxhbiwKCk9uIE1vbiwgQXByIDAxLCAyMDE5IGF0IDEwOjQzOjI0QU0gLTA0MDAsIEFsYW4g U3Rlcm4gd3JvdGU6Cj4gT24gTW9uLCAxIEFwciAyMDE5LCBTdXdhbiBLaW0gd3JvdGU6Cj4gCj4g PiBQYXRjaCAiVVNCOiBIQ0Q6IHN1cHBvcnQgZ2l2ZWJhY2sgb2YgVVJCIGluIHRhc2tsZXQgY29u dGV4dCJbMV0KPiA+IGludHJvZHVjZWQgZ2l2ZWJhY2sgb2YgdXJiIGluIHRhc2tsZXQgY29udGV4 dC4gWzFdIFRoaXMgcGF0Y2ggd2FzCj4gPiBhcHBsaWVkIHRvIGVoY2kgYnV0IG5vdCB4aGNpLiBb Ml0gVGhpcyBwYXRjaCBzaWduaWZpY2FudGx5IHJlZHVjZXMKPiA+IHRoZSBoYXJkIGlycSB0aW1l IG9mIHhoY2kuIEVzcGVjaWFsbHkgZm9yIHV2YyBkcml2ZXIsIHRoZSBoYXJkIGlycQo+ID4gaW5j bHVkaW5nIHRoZSB1dmMgY29tcGxldGlvbiBmdW5jdGlvbiBydW5zIHF1aXRlIGxvbmcgYnV0IGFw cGx5aW5nCj4gPiB0aGlzIHBhdGNoIHJlZHVjZXMgdGhlIGhhcmQgaXJxIHRpbWUgb2YgeGhjaS4K PiAKPiBQbGVhc2UgcmVhZCB0aGUga2VybmVsZG9jIGZvciB1c2Jfc3VibWl0X3VyYigpIGFuZCB1 c2Jfa2lsbF91cmIoKSwgaW4gCj4gcGFydGljdWxhciwgdGhlIHBhcnRzIHRoYXQgZGVzY3JpYmUg aG93IGlzb2Nocm9ub3VzIFVSQnMgYXJlIHRyZWF0ZWQuICAKPiBDYW4geW91IGd1YXJhbnRlZSB0 aGF0IHdpdGggdGhpcyBwYXRjaCBhcHBsaWVkLCB4aGNpLWhjZCB3aWxsIGNvbnRpbnVlIAo+IHRv IHdvcmsgYXMgdGhlIGtlcm5lbGRvYyBkZXNjcmliZXM/Cj4gCgpJIHJlYWQgdGhlIGRlc2NyaXB0 aW9uIG9mIHVzYl9zdWJtaXRfdXJiKCkgYW5kIHVzYl9raWxsX3VyYigpIGFuZCBpCnRoaW5rIHRo YXQgeGhjaS1oY2Qgd2l0aCB3aGljaCB0aGlzIHBhdGNoIGlzIGFwcGxpZWQgd29ya3MgYXMgdGhl CmRlc2NyaXB0aW9uIG9mIHVzYl9zdWJtaXRfdXJiKCkgYW5kIHVzYl9raWxsX3VyYigpLgoKSW4g dGhlIGNhc2Ugb2YgdXNiX3N1Ym1pdF91cmIoKSwgeGhjaSBzcGVjIDQuMTAuMy4xICJSaW5nIE92 ZXJydW4gYW5kClVuZGVycnVuIiBkZXNjcmliZXMgdGhlIGJlaGF2aW9yIG9mIHhoY2kgd2hlbiBh biBpc29jaHJvbm91cyByaW5nIGlzCmVtcHR5IGR1ZSB0byB0aGUgbGF0ZSBVUkIgc3VibWlzc2lv biBpbiBkcml2ZXIuIChJbiB0aGlzIHBhdGNoLCBlbXB0eQppc29jaHJvbm91cyByaW5nIGNhbiBo YXBwZW4gZHVlIHRvIHRhc2tsZXQgc2NoZWR1bGluZyBkZWxheSBpbiBVUkIKY29tcGxldGUgZnVu Y3Rpb24gd2hpY2ggY2FsbHMgdGhlIG5leHQgdXNiX3N1Ym1pdF91cmIoKSkKCkFjY29yZGluZyB0 byB0aGUgeGhjaSBzcGVjLCB4SEMgZGVhbHMgd2l0aCBhIGxhdGUgaXNvY2hyb25vdXMgVVJCCmFj Y29yZGluZyB0byB0aGUgU0lBKFN0YXJ0IElzb2NoIEFTQVApIGZsYWcgb2YgVFJCIGFuZCBTSUEg ZmxhZyBpcwpzZXQgYWNjb3JkaW5nIHRvIFVSQl9JU09fQVNBUCBmbGFnIGluIHhoY2lfcXVldWVf aXNvY190eCgpLgoKSWYgdGhlIFNJQSBmbGFnIGlzIHNldCwgeEhDIHdpbGwgc2NoZWR1bGUgdGhl IGxhdGUgaXNvY2hyb25vdXMgVVJCIGluCnRoZSBuZXh0ICJFbmRwb2ludCBTZXJ2aWNlIEludGVy dmFsIFRpbWUiIChuZXh0IGF2YWlsYWJsZSBmcmFtZSkgYW5kCnRyYW5zbWl0cyBpc2Nocm9ub3Vz IFVSQiBpbiB0aGF0IGZyYW1lLgoKSWYgdGhlIFNJQSBmbGFnIGlzIGNsZWFyZWQgKFVSQl9JU09f QVNBUCBmbGFnIGlzIGNsZWFyZWQpLCB4SEMgZ2VuZXJhdGVzCiJNaXNzZWQgU2VydmljZSBFcnJv ciIgZXZlbnQgYW5kIHNraXBzIHRoZSBsYXRlIGlzb2Nocm9ub3VzIFVSQiBhbmQKZG9lbid0IHRy YW5zbWl0IGl0LiBXaGVuIHRoZSBpbnRlcnJ1cHQgaGFuZGxlciAoeGhjaV9pcnEpIHJlY2VpdmVz CiJNaXNzZWQgU2VydmljZSBFcnJvciIgZXZlbnQsIGl0IHJldHVybnMgdGhlIGxhdGUgaXNvY2hy b25vdXMgVVJCIHRvCnRoZSBkcml2ZXIgY2FsbGluZyB1c2JfaGNkX2dpdmViYWNrX3VyYigpIHdp dGggLUVYREVWIGVycm9yIGNvZGUgaW4KdXNiX2lzb19wYWNrZXRfZGVzY3JpcHRvci0+c3RhdHVz IGF0IHNraXBfaXNvY190ZCgpLiBTbyB4aGNpIGJlaGF2aW9yCmFib3V0IHRoZSBsYXRlIGlzb2No cm9ub3VzIFVSQiBpbiBzcGVjIGFuZCBpbXBsZW1lbnRhdGlvbiBpcyBzYW1lCndpdGggdGhlIGRl c2NyaXB0aW9uIG9mIHVzYl9zdWJtaXRfdXJiKCkuCgpJbiB0aGUgY2FzZSBvZiB1c2Jfa2lsbF91 cmIoKSwgZGVzY3JpcHRpb24gc2F5cyB0aGF0IGl0IHdhaXRzIHVudGlsCnRoZSBVUkIgY29tcGxl dGUgZnVuY3Rpb24gZmluaXNoZXMgYW5kIHRoZSBpbXBvcnRhbnQgcG9pbnQgaXMgdGhhdAp3aGV0 aGVyIHRoZSBVU0IgY29tcGxldGUgZnVuY3Rpb24gaXMgY2FsbGVkIGVhcmx5IG9yIGxhdGUgZG9l c24ndAphZmZlY3QgdGhlIGJlaGF2aW9yIG9mIHVzYl9raWxsX3VyYigpIGJlY2F1c2UgX191c2Jf aGNkX2dpdmViYWNrX3VyYigpCndha2VzIHVwIHVzYl9raWxsX3VyYigpIGFmdGVyIGNhbGxpbmcg VVJCIGNvbXBsZXRlIGZ1bmN0aW9uLgpTbywgcGVuZGluZyBhIFVSQiBjb21wbGV0ZSBmdW5jdGlv biBpbiB0YXNrbGV0IGRvZXNuJ3QgYWZmZWN0IHRoZQpiZWhhdmlvciBvZiB4aGNpIGluIHVzYl9r aWxsX3VyYigpLgoKUmVnYXJkcwoKU3V3YW4gS2ltCg==