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: dma-mapping: clearing GFP_ZERO flag caused crashes of Ethernet on arc/hsdk board. From: Christoph Hellwig Message-Id: <20180328075313.GA19864@lst.de> Date: Wed, 28 Mar 2018 09:53:13 +0200 To: Alexey Brodkin Cc: "andy.shevchenko@gmail.com" , "linux-kernel@vger.kernel.org" , "jesper.nilsson@axis.com" , "Eugeniy.Paltsev@synopsys.com" , "hch@lst.de" , "linux-snps-arc@lists.infradead.org" , "iommu@lists.linux-foundation.org" , "dmaengine@vger.kernel.org" , "Evgeniy.Didin@synopsys.com" , "geert@linux-m68k.org" List-ID: PiA+IFRoZSBsb2dpY2FsIHF1ZXN0aW9uIGlzIHdoeT8KPiAKPiAxLiBTZWUgdGhhdCdzIGFub3Ro ZXIgcGxhdGZvcm0gd2l0aCBBUkMgY29yZSBzbyBtYXliZSBpbiBjYXNlIG9mIEFSTQo+ICAgIERN QSBhbGxvY2F0b3IgYWxyZWFkeSB6ZXJvZXMgcGFnZXMgcmVnYXJkbGVzcyBwcm92aWRlZCBmbGFn cyAtCj4gICAgcGVyc29uYWxseSBJIGRpZG4ndCBjaGVjayB0aGF0LgoKWWVzLCBtb3N0IGFyY2hp dGVjdHVyZXMgYWx3YXlzIGNsZWFyIG1lbW9yeSByZXR1cm5lZCBieSBkbWFfYWxsb2MqLgpMb29r cyBsaWtlIGEgZmV3IGRvbid0IGFuZCBteSBjb21taXQgZ290IHRoZW0gaW4gdHJvdWJsZS4gIEFz IHVzdWFsCkknZCBwcmVmZXIgdG8gbWF0Y2ggeDg2IHNlbWFudGljcyBmb3Igbm93IHRvIGF2b2lk IHByb2JsZW1zLgoKSSdsbCBzZW5kIHBhdGNoZXMgZm9yIGFyYyBhbmQgczM5MCB3aGljaCBzZWVt IHRvIGJlIGFjdHVhbGx5IHVzZWQKaG9sZG91dHMsIGFuZCB3aWxsIGxvb2sgaWYgYW55b25lIGVs c2UgaXMgYWxzbyBhZmZlY3RlZC4KLS0tClRvIHVuc3Vic2NyaWJlIGZyb20gdGhpcyBsaXN0OiBz ZW5kIHRoZSBsaW5lICJ1bnN1YnNjcmliZSBkbWFlbmdpbmUiIGluCnRoZSBib2R5IG9mIGEgbWVz c2FnZSB0byBtYWpvcmRvbW9Admdlci5rZXJuZWwub3JnCk1vcmUgbWFqb3Jkb21vIGluZm8gYXQg IGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jkb21vLWluZm8uaHRtbAo=