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: [1/6] dma: tegra: avoid overflow of byte tracking From: Dmitry Osipenko Message-Id: Date: Tue, 6 Nov 2018 16:11:29 +0300 To: Ben Dooks , dan.j.williams@intel.com, vkoul@kernel.org Cc: ldewangan@nvidia.com, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org List-ID: T24gMzEuMTAuMjAxOCAxOTowMywgQmVuIERvb2tzIHdyb3RlOgo+IFRoZSBkbWFfZGVzYy0+Ynl0 ZXNfdHJhbnNmZXJyZWQgY291bnRlciB0cmFja3MgdGhlIG51bWJlciBvZiBieXRlcwo+IG1vdmVk IGJ5IHRoZSBETUEgY2hhbm5lbC4gVGhpcyBpcyB0aGVuIHVzZWQgdG8gY2FsY3VsYXRlIHRoZSBp bmZvcm1hdGlvbgo+IHBhc3NlZCBiYWNrIGluIHRoZSBpbiB0aGUgdGVncmFfZG1hX3R4X3N0YXR1 cyBjYWxsYmFjaywgd2hpY2ggaXMgdXN1YWxseQo+IGZpbmUuCj4gCj4gV2hlbiB0aGUgRE1BIGNo YW5uZWwgaXMgY29uZmlndXJlZCBhcyBjb250aW5vdXMsIHRoZW4gdGhlIGJ5dGVzX3RyYW5zZmVy cmVkCj4gY291bnRlciB3aWxsIGluY3JlYXNlIG92ZXIgdGltZSBhbmQgZXZlbnR1YWxseSBvdmVy ZmxvdyB0byBiZWNvbWUgbmVnYXRpdmUKPiBzbyB0aGUgcmVzaWR1ZSBjb3VudCB3aWxsIGJlY29t ZSBpbnZhbGlkIGFuZCB0aGUgQUxTQSBzb3VuZC1kbWEgY29kZSB3aWxsCj4gcmVwb3J0IGludmFs aWQgaGFyZHdhcmUgcG9pbnRlciB2YWx1ZXMgdG8gdGhlIGFwcGxpY2F0aW9uLiBUaGlzIHJlc3Vs dHMgaW4KPiBzb21lIHVzZXJzIGJlY29taW5nIGNvbmZ1c2VkIGFib3V0IHRoZSBwbGF5b3V0IHBv c2l0aW9uIGFuZCBwdXR0aW5nIGF1ZGlvCj4gZGF0YSBpbiB0aGUgd3JvbmcgcGxhY2UuCj4gCj4g VG8gZml4IHRoaXMgaXNzdWUsIGFsd2F5cyBlbnN1cmUgdGhlIGJ5dGVzX3RyYW5zZmVycmVkIGZp ZWxkIGlzIG1vZHVsbyB0aGUKPiBzaXplIG9mIHRoZSByZXF1ZXN0LiBXZSBvbmx5IGRvIHRoaXMg Zm9yIHRoZSBjYXNlIG9mIHRoZSBjeWNsaWMgdHJhbnNmZXIKPiBkb25lIElTUiBhcyBhbnlvbmUg YXR0ZW1wdGluZyB0byBtb3ZlIDJHaUIgb2YgRE1BIGRhdGEgaW4gb25lIHRyYW5zZmVyCj4gaXMg dW5saWtlbHkuCj4gCj4gTm90ZSwgd2UgZG9uJ3QgZml4IHRoZSBpc3N1ZSB0aGF0IHdlIHNob3Vs ZCAvbmV2ZXIvIHRyYW5zZmVyIGEgbmVnYXRpdmUKPiBudW1iZXIgb2YgYnl0ZXMgc28gd2UgY291 bGQgbWFrZSB0aG9zZSBmaWVsZHMgdW5zaWduZWQuCj4gCj4gU2lnbmVkLW9mZi1ieTogQmVuIERv b2tzIDxiZW4uZG9va3NAY29kZXRoaW5rLmNvLnVrPgo+IC0tLQo+ICBkcml2ZXJzL2RtYS90ZWdy YTIwLWFwYi1kbWEuYyB8IDUgKysrKy0KPiAgMSBmaWxlIGNoYW5nZWQsIDQgaW5zZXJ0aW9ucygr KSwgMSBkZWxldGlvbigtKQo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2RtYS90ZWdyYTIwLWFw Yi1kbWEuYyBiL2RyaXZlcnMvZG1hL3RlZ3JhMjAtYXBiLWRtYS5jCj4gaW5kZXggOWE1NThlMzBj NDYxLi44MjE5YWI4OGE1MDcgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9kbWEvdGVncmEyMC1hcGIt ZG1hLmMKPiArKysgYi9kcml2ZXJzL2RtYS90ZWdyYTIwLWFwYi1kbWEuYwo+IEBAIC02MzYsNyAr NjM2LDEwIEBAIHN0YXRpYyB2b2lkIGhhbmRsZV9jb250X3NuZ2xfY3ljbGVfZG1hX2RvbmUoc3Ry dWN0IHRlZ3JhX2RtYV9jaGFubmVsICp0ZGMsCj4gIAo+ICAJc2dyZXEgPSBsaXN0X2ZpcnN0X2Vu dHJ5KCZ0ZGMtPnBlbmRpbmdfc2dfcmVxLCB0eXBlb2YoKnNncmVxKSwgbm9kZSk7Cj4gIAlkbWFf ZGVzYyA9IHNncmVxLT5kbWFfZGVzYzsKPiAtCWRtYV9kZXNjLT5ieXRlc190cmFuc2ZlcnJlZCAr PSBzZ3JlcS0+cmVxX2xlbjsKPiArCS8qIGlmIHdlIGRtYSBmb3IgbG9uZyBlbm91Z2ggdGhlIHRy YW5zZmVyIGNvdW50IHdpbGwgd3JhcCAqLwo+ICsJZG1hX2Rlc2MtPmJ5dGVzX3RyYW5zZmVycmVk ID0KPiArCQkoZG1hX2Rlc2MtPmJ5dGVzX3RyYW5zZmVycmVkICsgc2dyZXEtPnJlcV9sZW4pICUK PiArCQlkbWFfZGVzYy0+Ynl0ZXNfcmVxdWVzdGVkOwo+ICAKPiAgCS8qIENhbGxiYWNrIG5lZWQg dG8gYmUgY2FsbCAqLwo+ICAJaWYgKCFkbWFfZGVzYy0+Y2JfY291bnQpCj4gCgpSZXZpZXdlZC1i eTogRG1pdHJ5IE9zaXBlbmtvIDxkaWdldHhAZ21haWwuY29tPgo=