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: [1/5] dma: tegra: avoid overflow of byte tracking From: Jon Hunter Message-Id: <96cfa98c-59aa-c94e-c17d-a0b7bf84045f@nvidia.com> Date: Thu, 22 Nov 2018 08:27:45 +0000 To: Ben Dooks , dan.j.williams@intel.com, vkoul@kernel.org, dmaengine@vger.kernel.org Cc: ldewangan@nvidia.com, linux-tegra@vger.kernel.org List-ID: T24gMjEvMTEvMjAxOCAxNjoxMywgQmVuIERvb2tzIHdyb3RlOgo+IFRoZSBkbWFfZGVzYy0+Ynl0 ZXNfdHJhbnNmZXJyZWQgY291bnRlciB0cmFja3MgdGhlIG51bWJlciBvZiBieXRlcwo+IG1vdmVk IGJ5IHRoZSBETUEgY2hhbm5lbC4gVGhpcyBpcyB0aGVuIHVzZWQgdG8gY2FsY3VsYXRlIHRoZSBp bmZvcm1hdGlvbgo+IHBhc3NlZCBiYWNrIGluIHRoZSBpbiB0aGUgdGVncmFfZG1hX3R4X3N0YXR1 cyBjYWxsYmFjaywgd2hpY2ggaXMgdXN1YWxseQo+IGZpbmUuCj4gCj4gV2hlbiB0aGUgRE1BIGNo YW5uZWwgaXMgY29uZmlndXJlZCBhcyBjb250aW5vdXMsIHRoZW4gdGhlIGJ5dGVzX3RyYW5zZmVy cmVkCj4gY291bnRlciB3aWxsIGluY3JlYXNlIG92ZXIgdGltZSBhbmQgZXZlbnR1YWxseSBvdmVy ZmxvdyB0byBiZWNvbWUgbmVnYXRpdmUKPiBzbyB0aGUgcmVzaWR1ZSBjb3VudCB3aWxsIGJlY29t ZSBpbnZhbGlkIGFuZCB0aGUgQUxTQSBzb3VuZC1kbWEgY29kZSB3aWxsCj4gcmVwb3J0IGludmFs aWQgaGFyZHdhcmUgcG9pbnRlciB2YWx1ZXMgdG8gdGhlIGFwcGxpY2F0aW9uLiBUaGlzIHJlc3Vs dHMgaW4KPiBzb21lIHVzZXJzIGJlY29taW5nIGNvbmZ1c2VkIGFib3V0IHRoZSBwbGF5b3V0IHBv c2l0aW9uIGFuZCBwdXR0aW5nIGF1ZGlvCj4gZGF0YSBpbiB0aGUgd3JvbmcgcGxhY2UuCj4gCj4g VG8gZml4IHRoaXMgaXNzdWUsIGFsd2F5cyBlbnN1cmUgdGhlIGJ5dGVzX3RyYW5zZmVycmVkIGZp ZWxkIGlzIG1vZHVsbyB0aGUKPiBzaXplIG9mIHRoZSByZXF1ZXN0LiBXZSBvbmx5IGRvIHRoaXMg Zm9yIHRoZSBjYXNlIG9mIHRoZSBjeWNsaWMgdHJhbnNmZXIKPiBkb25lIElTUiBhcyBhbnlvbmUg YXR0ZW1wdGluZyB0byBtb3ZlIDJHaUIgb2YgRE1BIGRhdGEgaW4gb25lIHRyYW5zZmVyCj4gaXMg dW5saWtlbHkuCj4gCj4gTm90ZSwgd2UgZG9uJ3QgZml4IHRoZSBpc3N1ZSB0aGF0IHdlIHNob3Vs ZCAvbmV2ZXIvIHRyYW5zZmVyIGEgbmVnYXRpdmUKPiBudW1iZXIgb2YgYnl0ZXMgc28gd2UgY291 bGQgbWFrZSB0aG9zZSBmaWVsZHMgdW5zaWduZWQuCj4gCj4gUmV2aWV3ZWQtYnk6IERtaXRyeSBP c2lwZW5rbyA8ZGlnZXR4QGdtYWlsLmNvbT4KPiBTaWduZWQtb2ZmLWJ5OiBCZW4gRG9va3MgPGJl bi5kb29rc0Bjb2RldGhpbmsuY28udWs+Cj4gLS0tCj4gIGRyaXZlcnMvZG1hL3RlZ3JhMjAtYXBi LWRtYS5jIHwgNSArKysrLQo+ICAxIGZpbGUgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspLCAxIGRl bGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZG1hL3RlZ3JhMjAtYXBiLWRtYS5j IGIvZHJpdmVycy9kbWEvdGVncmEyMC1hcGItZG1hLmMKPiBpbmRleCA5YTU1OGUzMGM0NjEuLjgy MTlhYjg4YTUwNyAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL2RtYS90ZWdyYTIwLWFwYi1kbWEuYwo+ ICsrKyBiL2RyaXZlcnMvZG1hL3RlZ3JhMjAtYXBiLWRtYS5jCj4gQEAgLTYzNiw3ICs2MzYsMTAg QEAgc3RhdGljIHZvaWQgaGFuZGxlX2NvbnRfc25nbF9jeWNsZV9kbWFfZG9uZShzdHJ1Y3QgdGVn cmFfZG1hX2NoYW5uZWwgKnRkYywKPiAgCj4gIAlzZ3JlcSA9IGxpc3RfZmlyc3RfZW50cnkoJnRk Yy0+cGVuZGluZ19zZ19yZXEsIHR5cGVvZigqc2dyZXEpLCBub2RlKTsKPiAgCWRtYV9kZXNjID0g c2dyZXEtPmRtYV9kZXNjOwo+IC0JZG1hX2Rlc2MtPmJ5dGVzX3RyYW5zZmVycmVkICs9IHNncmVx LT5yZXFfbGVuOwo+ICsJLyogaWYgd2UgZG1hIGZvciBsb25nIGVub3VnaCB0aGUgdHJhbnNmZXIg Y291bnQgd2lsbCB3cmFwICovCj4gKwlkbWFfZGVzYy0+Ynl0ZXNfdHJhbnNmZXJyZWQgPQo+ICsJ CShkbWFfZGVzYy0+Ynl0ZXNfdHJhbnNmZXJyZWQgKyBzZ3JlcS0+cmVxX2xlbikgJQo+ICsJCWRt YV9kZXNjLT5ieXRlc19yZXF1ZXN0ZWQ7Cj4gIAo+ICAJLyogQ2FsbGJhY2sgbmVlZCB0byBiZSBj YWxsICovCj4gIAlpZiAoIWRtYV9kZXNjLT5jYl9jb3VudCkKCkFja2VkLWJ5OiBKb24gSHVudGVy IDxqb25hdGhhbmhAbnZpZGlhLmNvbT4KClRoYW5rcyEKSm9uCg==