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: [1/3] dma: tegra: avoid overflow of byte tracking From: Ben Dooks Message-Id: Date: Wed, 14 Nov 2018 14:23:48 +0000 To: Dmitry Osipenko Cc: dan.j.williams@intel.com, vkoul@kernel.org, ldewangan@nvidia.com, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org List-ID: T24gMjAxOC0xMS0xNCAxMjoxMiwgRG1pdHJ5IE9zaXBlbmtvIHdyb3RlOgo+IE9uIDE0LjExLjIw MTggMTM6MTMsIEJlbiBEb29rcyB3cm90ZToKPj4gVGhlIGRtYV9kZXNjLT5ieXRlc190cmFuc2Zl cnJlZCBjb3VudGVyIHRyYWNrcyB0aGUgbnVtYmVyIG9mIGJ5dGVzCj4+IG1vdmVkIGJ5IHRoZSBE TUEgY2hhbm5lbC4gVGhpcyBpcyB0aGVuIHVzZWQgdG8gY2FsY3VsYXRlIHRoZSAKPj4gaW5mb3Jt YXRpb24KPj4gcGFzc2VkIGJhY2sgaW4gdGhlIGluIHRoZSB0ZWdyYV9kbWFfdHhfc3RhdHVzIGNh bGxiYWNrLCB3aGljaCBpcyAKPj4gdXN1YWxseQo+PiBmaW5lLgo+PiAKPj4gV2hlbiB0aGUgRE1B IGNoYW5uZWwgaXMgY29uZmlndXJlZCBhcyBjb250aW5vdXMsIHRoZW4gdGhlIAo+PiBieXRlc190 cmFuc2ZlcnJlZAo+PiBjb3VudGVyIHdpbGwgaW5jcmVhc2Ugb3ZlciB0aW1lIGFuZCBldmVudHVh bGx5IG92ZXJmbG93IHRvIGJlY29tZSAKPj4gbmVnYXRpdmUKPj4gc28gdGhlIHJlc2lkdWUgY291 bnQgd2lsbCBiZWNvbWUgaW52YWxpZCBhbmQgdGhlIEFMU0Egc291bmQtZG1hIGNvZGUgCj4+IHdp bGwKPj4gcmVwb3J0IGludmFsaWQgaGFyZHdhcmUgcG9pbnRlciB2YWx1ZXMgdG8gdGhlIGFwcGxp Y2F0aW9uLiBUaGlzIAo+PiByZXN1bHRzIGluCj4+IHNvbWUgdXNlcnMgYmVjb21pbmcgY29uZnVz ZWQgYWJvdXQgdGhlIHBsYXlvdXQgcG9zaXRpb24gYW5kIHB1dHRpbmcgCj4+IGF1ZGlvCj4+IGRh dGEgaW4gdGhlIHdyb25nIHBsYWNlLgo+PiAKPj4gVG8gZml4IHRoaXMgaXNzdWUsIGFsd2F5cyBl bnN1cmUgdGhlIGJ5dGVzX3RyYW5zZmVycmVkIGZpZWxkIGlzIG1vZHVsbyAKPj4gdGhlCj4+IHNp emUgb2YgdGhlIHJlcXVlc3QuIFdlIG9ubHkgZG8gdGhpcyBmb3IgdGhlIGNhc2Ugb2YgdGhlIGN5 Y2xpYyAKPj4gdHJhbnNmZXIKPj4gZG9uZSBJU1IgYXMgYW55b25lIGF0dGVtcHRpbmcgdG8gbW92 ZSAyR2lCIG9mIERNQSBkYXRhIGluIG9uZSB0cmFuc2Zlcgo+PiBpcyB1bmxpa2VseS4KPj4gCj4+ IE5vdGUsIHdlIGRvbid0IGZpeCB0aGUgaXNzdWUgdGhhdCB3ZSBzaG91bGQgL25ldmVyLyB0cmFu c2ZlciBhIAo+PiBuZWdhdGl2ZQo+PiBudW1iZXIgb2YgYnl0ZXMgc28gd2UgY291bGQgbWFrZSB0 aG9zZSBmaWVsZHMgdW5zaWduZWQuCj4+IAo+PiBSZXZpZXdlZC1ieTogRG1pdHJ5IE9zaXBlbmtv IDxkaWdldHhAZ21haWwuY29tPgo+PiBTaWduZWQtb2ZmLWJ5OiBCZW4gRG9va3MgPGJlbi5kb29r c0Bjb2RldGhpbmsuY28udWs+Cj4+IC0tLQo+PiAgZHJpdmVycy9kbWEvdGVncmEyMC1hcGItZG1h LmMgfCA1ICsrKystCj4+ICAxIGZpbGUgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspLCAxIGRlbGV0 aW9uKC0pCj4+IAo+PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9kbWEvdGVncmEyMC1hcGItZG1hLmMg Cj4+IGIvZHJpdmVycy9kbWEvdGVncmEyMC1hcGItZG1hLmMKPj4gaW5kZXggOWE1NThlMzBjNDYx Li44MjE5YWI4OGE1MDcgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvZG1hL3RlZ3JhMjAtYXBiLWRt YS5jCj4+ICsrKyBiL2RyaXZlcnMvZG1hL3RlZ3JhMjAtYXBiLWRtYS5jCj4+IEBAIC02MzYsNyAr NjM2LDEwIEBAIHN0YXRpYyB2b2lkIAo+PiBoYW5kbGVfY29udF9zbmdsX2N5Y2xlX2RtYV9kb25l KHN0cnVjdCB0ZWdyYV9kbWFfY2hhbm5lbCAqdGRjLAo+PiAKPj4gIAlzZ3JlcSA9IGxpc3RfZmly c3RfZW50cnkoJnRkYy0+cGVuZGluZ19zZ19yZXEsIHR5cGVvZigqc2dyZXEpLCAKPj4gbm9kZSk7 Cj4+ICAJZG1hX2Rlc2MgPSBzZ3JlcS0+ZG1hX2Rlc2M7Cj4+IC0JZG1hX2Rlc2MtPmJ5dGVzX3Ry YW5zZmVycmVkICs9IHNncmVxLT5yZXFfbGVuOwo+PiArCS8qIGlmIHdlIGRtYSBmb3IgbG9uZyBl bm91Z2ggdGhlIHRyYW5zZmVyIGNvdW50IHdpbGwgd3JhcCAqLwo+PiArCWRtYV9kZXNjLT5ieXRl c190cmFuc2ZlcnJlZCA9Cj4+ICsJCShkbWFfZGVzYy0+Ynl0ZXNfdHJhbnNmZXJyZWQgKyBzZ3Jl cS0+cmVxX2xlbikgJQo+PiArCQlkbWFfZGVzYy0+Ynl0ZXNfcmVxdWVzdGVkOwo+PiAKPj4gIAkv KiBDYWxsYmFjayBuZWVkIHRvIGJlIGNhbGwgKi8KPj4gIAlpZiAoIWRtYV9kZXNjLT5jYl9jb3Vu dCkKPj4gCj4gCj4gSSBhbHNvIGFjdHVhbGx5IHRlc3RlZCB0aGF0IGF1ZGlvIHBsYXliYWNrIGJy ZWFrcyBhZnRlciB0aGUgb3ZlcmZsb3cKPiBhbmQgdGhpcyBwYXRjaCBmaXhlcyBpdC4KClRoYW5r cywgSSBzaG91bGQgaGF2ZSBwb3N0ZWQgYSBsaW5rIHRvIGEgdGVzdC1wYXRjaCBJIGhhZAphIHdo aWxlIGFnby4KCj4gVGVzdGVkLWJ5OiBEbWl0cnkgT3NpcGVua28gPGRpZ2V0eEBnbWFpbC5jb20+ Cg==