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: dmaengine: at_xdmac: Fix wrongfull report of a channel as in use From: Codrin Ciubotariu Message-Id: <20190117160957.13175-1-codrin.ciubotariu@microchip.com> Date: Thu, 17 Jan 2019 16:10:38 +0000 To: Ludovic.Desroches@microchip.com, vkoul@kernel.org Cc: dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Codrin.Ciubotariu@microchip.com List-ID: RnJvbTogQ29kcmluIENpdWJvdGFyaXUgPGNvZHJpbi5jaXVib3Rhcml1QG1pY3JvY2hpcC5jb20+ CgphdGNoYW4tPnN0YXR1cyBpcyB1c2VkIGZvciB0d28gdGhpbmdzOgogLSBwYXNzIGNoYW5uZWwg aW50ZXJydXB0cyBzdGF0dXMgZnJvbSBpbnRlcnJ1cHQgaGFuZGxlciB0byB0YXNrbGV0OwogLSBj aGFubmVsIGluZm9ybWF0aW9uIGxpa2Ugd2hldGhlciBpdCBpcyBjeWNsaWMgb3IgcGF1c2VkOwoK U2luY2UgdGhlc2Ugb3BlcmF0aW9ucyBoYXZlIG5vdGhpbmcgaW4gY29tbW9uLCB0aGlzIHBhdGNo IGFkZHMgYQpkaWZmZXJlbnQgc3RydWN0IG1lbWJlciB0byBrZWVwIHRoZSBpbnRlcnJ1cHRzIHN0 YXR1cy4KCkZpeGVzIGEgYnVnIGluIHdoaWNoIGEgY2hhbm5lbCBpcyB3cm9uZ2Z1bGx5IHJlcG9y dGVkIGFzIGluIHVzZSB3aGVuCnRyeWluZyB0byBvYnRhaW4gYSBuZXcgZGVzY3JpcHRpb3IgZm9y IGEgcHJldmlvdXNseSB1c2VkIGN5Y2xpYyBjaGFubmVsLgoKU2lnbmVkLW9mZi1ieTogQ29kcmlu IENpdWJvdGFyaXUgPGNvZHJpbi5jaXVib3Rhcml1QG1pY3JvY2hpcC5jb20+Ci0tLQogZHJpdmVy cy9kbWEvYXRfeGRtYWMuYyB8IDE5ICsrKysrKysrKystLS0tLS0tLS0KIDEgZmlsZSBjaGFuZ2Vk LCAxMCBpbnNlcnRpb25zKCspLCA5IGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMv ZG1hL2F0X3hkbWFjLmMgYi9kcml2ZXJzL2RtYS9hdF94ZG1hYy5jCmluZGV4IDRlNTU3Njg0Zjc5 Mi4uZmU2OWRjY2ZhMGMwIDEwMDY0NAotLS0gYS9kcml2ZXJzL2RtYS9hdF94ZG1hYy5jCisrKyBi L2RyaXZlcnMvZG1hL2F0X3hkbWFjLmMKQEAgLTIwMyw2ICsyMDMsNyBAQCBzdHJ1Y3QgYXRfeGRt YWNfY2hhbiB7CiAJdTMyCQkJCXNhdmVfY2ltOwogCXUzMgkJCQlzYXZlX2NuZGE7CiAJdTMyCQkJ CXNhdmVfY25kYzsKKwl1MzIJCQkJaXJxX3N0YXR1czsKIAl1bnNpZ25lZCBsb25nCQkJc3RhdHVz OwogCXN0cnVjdCB0YXNrbGV0X3N0cnVjdAkJdGFza2xldDsKIAlzdHJ1Y3QgZG1hX3NsYXZlX2Nv bmZpZwkJc2NvbmZpZzsKQEAgLTE1ODAsOCArMTU4MSw4IEBAIHN0YXRpYyB2b2lkIGF0X3hkbWFj X3Rhc2tsZXQodW5zaWduZWQgbG9uZyBkYXRhKQogCXN0cnVjdCBhdF94ZG1hY19kZXNjCSpkZXNj OwogCXUzMgkJCWVycm9yX21hc2s7CiAKLQlkZXZfZGJnKGNoYW4yZGV2KCZhdGNoYW4tPmNoYW4p LCAiJXM6IHN0YXR1cz0weCUwOGx4XG4iLAotCQkgX19mdW5jX18sIGF0Y2hhbi0+c3RhdHVzKTsK KwlkZXZfZGJnKGNoYW4yZGV2KCZhdGNoYW4tPmNoYW4pLCAiJXM6IHN0YXR1cz0weCUwOHhcbiIs CisJCV9fZnVuY19fLCBhdGNoYW4tPmlycV9zdGF0dXMpOwogCiAJZXJyb3JfbWFzayA9IEFUX1hE TUFDX0NJU19SQkVJUwogCQkgICAgIHwgQVRfWERNQUNfQ0lTX1dCRUlTCkBAIC0xNTg5LDE1ICsx NTkwLDE1IEBAIHN0YXRpYyB2b2lkIGF0X3hkbWFjX3Rhc2tsZXQodW5zaWduZWQgbG9uZyBkYXRh KQogCiAJaWYgKGF0X3hkbWFjX2NoYW5faXNfY3ljbGljKGF0Y2hhbikpIHsKIAkJYXRfeGRtYWNf aGFuZGxlX2N5Y2xpYyhhdGNoYW4pOwotCX0gZWxzZSBpZiAoKGF0Y2hhbi0+c3RhdHVzICYgQVRf WERNQUNfQ0lTX0xJUykKLQkJICAgfHwgKGF0Y2hhbi0+c3RhdHVzICYgZXJyb3JfbWFzaykpIHsK Kwl9IGVsc2UgaWYgKChhdGNoYW4tPmlycV9zdGF0dXMgJiBBVF9YRE1BQ19DSVNfTElTKQorCQkg ICB8fCAoYXRjaGFuLT5pcnFfc3RhdHVzICYgZXJyb3JfbWFzaykpIHsKIAkJc3RydWN0IGRtYV9h c3luY190eF9kZXNjcmlwdG9yICAqdHhkOwogCi0JCWlmIChhdGNoYW4tPnN0YXR1cyAmIEFUX1hE TUFDX0NJU19SQkVJUykKKwkJaWYgKGF0Y2hhbi0+aXJxX3N0YXR1cyAmIEFUX1hETUFDX0NJU19S QkVJUykKIAkJCWRldl9lcnIoY2hhbjJkZXYoJmF0Y2hhbi0+Y2hhbiksICJyZWFkIGJ1cyBlcnJv ciEhISIpOwotCQlpZiAoYXRjaGFuLT5zdGF0dXMgJiBBVF9YRE1BQ19DSVNfV0JFSVMpCisJCWlm IChhdGNoYW4tPmlycV9zdGF0dXMgJiBBVF9YRE1BQ19DSVNfV0JFSVMpCiAJCQlkZXZfZXJyKGNo YW4yZGV2KCZhdGNoYW4tPmNoYW4pLCAid3JpdGUgYnVzIGVycm9yISEhIik7Ci0JCWlmIChhdGNo YW4tPnN0YXR1cyAmIEFUX1hETUFDX0NJU19ST0lTKQorCQlpZiAoYXRjaGFuLT5pcnFfc3RhdHVz ICYgQVRfWERNQUNfQ0lTX1JPSVMpCiAJCQlkZXZfZXJyKGNoYW4yZGV2KCZhdGNoYW4tPmNoYW4p LCAicmVxdWVzdCBvdmVyZmxvdyBlcnJvciEhISIpOwogCiAJCXNwaW5fbG9jaygmYXRjaGFuLT5s b2NrKTsKQEAgLTE2NTIsNyArMTY1Myw3IEBAIHN0YXRpYyBpcnFyZXR1cm5fdCBhdF94ZG1hY19p bnRlcnJ1cHQoaW50IGlycSwgdm9pZCAqZGV2X2lkKQogCQkJYXRjaGFuID0gJmF0eGRtYWMtPmNo YW5baV07CiAJCQljaGFuX2ltciA9IGF0X3hkbWFjX2NoYW5fcmVhZChhdGNoYW4sIEFUX1hETUFD X0NJTSk7CiAJCQljaGFuX3N0YXR1cyA9IGF0X3hkbWFjX2NoYW5fcmVhZChhdGNoYW4sIEFUX1hE TUFDX0NJUyk7Ci0JCQlhdGNoYW4tPnN0YXR1cyA9IGNoYW5fc3RhdHVzICYgY2hhbl9pbXI7CisJ CQlhdGNoYW4tPmlycV9zdGF0dXMgPSBjaGFuX3N0YXR1cyAmIGNoYW5faW1yOwogCQkJZGV2X3Zk YmcoYXR4ZG1hYy0+ZG1hLmRldiwKIAkJCQkgIiVzOiBjaGFuJWQ6IGltcj0weCV4LCBzdGF0dXM9 MHgleFxuIiwKIAkJCQkgX19mdW5jX18sIGksIGNoYW5faW1yLCBjaGFuX3N0YXR1cyk7CkBAIC0x NjY2LDcgKzE2NjcsNyBAQCBzdGF0aWMgaXJxcmV0dXJuX3QgYXRfeGRtYWNfaW50ZXJydXB0KGlu dCBpcnEsIHZvaWQgKmRldl9pZCkKIAkJCQkgYXRfeGRtYWNfY2hhbl9yZWFkKGF0Y2hhbiwgQVRf WERNQUNfQ0RBKSwKIAkJCQkgYXRfeGRtYWNfY2hhbl9yZWFkKGF0Y2hhbiwgQVRfWERNQUNfQ1VC QykpOwogCi0JCQlpZiAoYXRjaGFuLT5zdGF0dXMgJiAoQVRfWERNQUNfQ0lTX1JCRUlTIHwgQVRf WERNQUNfQ0lTX1dCRUlTKSkKKwkJCWlmIChhdGNoYW4tPmlycV9zdGF0dXMgJiAoQVRfWERNQUNf Q0lTX1JCRUlTIHwgQVRfWERNQUNfQ0lTX1dCRUlTKSkKIAkJCQlhdF94ZG1hY193cml0ZShhdHhk bWFjLCBBVF9YRE1BQ19HRCwgYXRjaGFuLT5tYXNrKTsKIAogCQkJdGFza2xldF9zY2hlZHVsZSgm YXRjaGFuLT50YXNrbGV0KTsK