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 HC busted? From: Sudip Mukherjee Message-Id: <20180608090712.3s52blbquphfmme6@debian> Date: Fri, 8 Jun 2018 10:07:52 +0100 To: Mathias Nyman Cc: Andy Shevchenko , Mathias Nyman , linux-usb@vger.kernel.org, lukaszx.szulc@intel.com, Christoph Hellwig , Marek Szyprowski , iommu@lists.linux-foundation.org List-ID: SGkgQWxsLAoKT24gVGh1LCBKdW4gMDcsIDIwMTggYXQgMTA6NDA6MDNBTSArMDMwMCwgTWF0aGlh cyBOeW1hbiB3cm90ZToKPiBPbiAwNi4wNi4yMDE4IDE5OjQ1LCBTdWRpcCBNdWtoZXJqZWUgd3Jv dGU6Cj4gPiBIaSBBbmR5LAo+ID4gCj4gPiBBbmQgd2UgbWVldCBhZ2Fpbi4gOikKPiA+IAo+ID4g T24gV2VkLCBKdW4gMDYsIDIwMTggYXQgMDY6MzY6MzVQTSArMDMwMCwgQW5keSBTaGV2Y2hlbmtv IHdyb3RlOgo+ID4gPiBPbiBXZWQsIDIwMTgtMDYtMDYgYXQgMTc6MTIgKzAzMDAsIE1hdGhpYXMg TnltYW4gd3JvdGU6Cj4gPiA+ID4gT24gMDQuMDYuMjAxOCAxODoyOCwgU3VkaXAgTXVraGVyamVl IHdyb3RlOgo+ID4gPiA+ID4gT24gVGh1LCBNYXkgMjQsIDIwMTggYXQgMDQ6MzU6MzRQTSArMDMw MCwgTWF0aGlhcyBOeW1hbiB3cm90ZToKPiA+ID4gPiA+ID4gCj4gPiA+IAo+ID4gPiA+IE9kZCBh bmQgdW5saWtlbHksIGJ1dCB0byBtZSB0aGlzIGxvb2tzIGxpa2Ugc29tZSBpc3N1ZSBpbiBhbGxv Y2F0aW5nCj4gPiA+ID4gZG1hIG1lbW9yeQo+ID4gPiA+IGZyb20gcG9vbCB1c2luZyBkbWFfcG9v bF96YWxsb2MoKQo+ID4gPiA+IAo+ID4gPiA+IEFkZGluZyBwZW9wbGUgd2l0aCBETUEga25vd2xl ZGdlIHRvIGNjLCBtYXliZSBzb21lb25lIGtub3dzIHdoYXQgaXMKPiA+ID4gPiBnb2luZyBvbi4K PiA+ID4gPiAKPiA+ID4gPiBIZXJlJ3MgdGhlIHN0b3J5Ogo+ID4gPiA+IFN1ZGlwIHNlZXMgdXNi IGlzc3VlcyBvbiBhIEludGVsIEF0b20gYmFzZWQgYm9hcmQgd2l0aCA0LjE0LjIga2VybmVsLgo+ ID4gPiA+IEFsbCB0cmFjaW5nIHBvaW50cyB0byBkbWFfcG9vbF96YWxsb2MoKSByZXR1cm5pbmcg dGhlIHNhbWUgZG1hIGFkZHJlc3MKPiA+ID4gPiBibG9jayBvbgo+ID4gPiA+IGNvbnNlY3V0aXZl IGNhbGxzLgoKV2UgaGF2ZSBzdGFydGVkIHRlc3Rpbmcgd2l0aCB2NC4xNC40NyBub3cgYW5kIHdl IGFyZSBzZWVpbmcgdGhlIGlzc3VlCndpdGggaXQgYWxzby4gOigKLS0tClJlZ2FyZHMKU3VkaXAK Ci0tClRvIHVuc3Vic2NyaWJlIGZyb20gdGhpcyBsaXN0OiBzZW5kIHRoZSBsaW5lICJ1bnN1YnNj cmliZSBsaW51eC11c2IiIGluCnRoZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdl ci5rZXJuZWwub3JnCk1vcmUgbWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5lbC5v cmcvbWFqb3Jkb21vLWluZm8uaHRtbAo= From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sudip Mukherjee Subject: Re: usb HC busted? Date: Fri, 8 Jun 2018 10:07:52 +0100 Message-ID: <20180608090712.3s52blbquphfmme6@debian> References: <6790b352-add3-5531-115c-15db6c9c744d@intel.com> <20180518130458.v73syr3fltdzdzzi@debian> <881d576b-c7c1-ef74-c6bc-68b81371e7e0@intel.com> <20180523212956.n4ztasdffg2aeaku@debian> <80eace7a-976d-65a5-a353-54a2b18edd06@linux.intel.com> <20180604152848.db3msouyi4ektvv6@debian> <06226ecb-baad-cc36-e9e3-797dabb0aa5e@linux.intel.com> <42ec4ab07d96b4302b875ac9c5eb76675bf85690.camel@linux.intel.com> <20180606164524.n4vb7xre6rykzxih@debian> <2e8829c2-850d-6bca-5f0c-58a809dc9499@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <2e8829c2-850d-6bca-5f0c-58a809dc9499-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Mathias Nyman Cc: Mathias Nyman , linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, lukaszx.szulc-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Andy Shevchenko , Christoph Hellwig List-Id: iommu@lists.linux-foundation.org Hi All, On Thu, Jun 07, 2018 at 10:40:03AM +0300, Mathias Nyman wrote: > On 06.06.2018 19:45, Sudip Mukherjee wrote: > > Hi Andy, > > > > And we meet again. :) > > > > On Wed, Jun 06, 2018 at 06:36:35PM +0300, Andy Shevchenko wrote: > > > On Wed, 2018-06-06 at 17:12 +0300, Mathias Nyman wrote: > > > > On 04.06.2018 18:28, Sudip Mukherjee wrote: > > > > > On Thu, May 24, 2018 at 04:35:34PM +0300, Mathias Nyman wrote: > > > > > > > > > > > > > Odd and unlikely, but to me this looks like some issue in allocating > > > > dma memory > > > > from pool using dma_pool_zalloc() > > > > > > > > Adding people with DMA knowledge to cc, maybe someone knows what is > > > > going on. > > > > > > > > Here's the story: > > > > Sudip sees usb issues on a Intel Atom based board with 4.14.2 kernel. > > > > All tracing points to dma_pool_zalloc() returning the same dma address > > > > block on > > > > consecutive calls. We have started testing with v4.14.47 now and we are seeing the issue with it also. :( -- Regards Sudip