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: imx-sdma: fix pagefault when channel is disabled during interrupt From: Thierry Bultel Message-Id: <63e43990-d549-53cb-ae4c-813bf3cd8085@pixelsurmer.com> Date: Tue, 27 Feb 2018 16:17:18 +0100 To: Vinod Koul Cc: dmaengine@vger.kernel.org List-ID: VGhhbmtzIFZpbm9kLAoKSSBoYWQgcG9zdGVkIGEgVjIgbWVhbndoaWxlLgpJIGp1c3QgcG9zdGVk IGEgVjMgdGhhdCB0YWtlcyB5b3VyIGNvbW1lbnRzIGludG8gYWNjb3VudAoKQmVzdCBSZWdhcmRz LApUaGllcnJ5CgpMZSAyNy8wMi8yMDE4IMOgIDE2OjAxLCBWaW5vZCBLb3VsIGEgw6ljcml0wqA6 Cj4gT24gVHVlLCBGZWIgMTMsIDIwMTggYXQgMDk6NDc6MjNBTSArMDEwMCwgVGhpZXJyeSBCdWx0 ZWwgd3JvdGU6Cj4+IEFkZCBhIHNwaW5sb2NrIGFuZCBhICdlbmFibGVkJyBib29sZWFuIG9uIGNo YW5uZWwgZGVzY3JpcHRvciwgdG8gYXZvaWQKPj4gdXNpbmcgYnVmZmVyIGRlc2NyaXB0b3JzIGlu IHRoZSBpbnRlcnJ1cHQgY29udGV4dCwKPj4gc2RtYV9kaXNhYmxlX2NoYW5uZWwgaXMgY2FsbGVk IG1lYW53aGlsZS4KPj4gLS0tCj4+ICAgZHJpdmVycy9kbWEvaW14LXNkbWEuYyB8IDIxICsrKysr KysrKysrKysrKysrKysrKwo+PiAgIDEgZmlsZSBjaGFuZ2VkLCAyMSBpbnNlcnRpb25zKCspCj4+ Cj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2RtYS9pbXgtc2RtYS5jIGIvZHJpdmVycy9kbWEvaW14 LXNkbWEuYwo+PiBpbmRleCBkMTY1MWE1Li43ZWFiNDJiIDEwMDY0NAo+PiAtLS0gYS9kcml2ZXJz L2RtYS9pbXgtc2RtYS5jCj4+ICsrKyBiL2RyaXZlcnMvZG1hL2lteC1zZG1hLmMKPj4gQEAgLTMz MCw2ICszMzAsNyBAQCBzdHJ1Y3Qgc2RtYV9jaGFubmVsIHsKPj4gICAJdW5zaWduZWQgaW50CQkJ Y2huX3JlYWxfY291bnQ7Cj4+ICAgCXN0cnVjdCB0YXNrbGV0X3N0cnVjdAkJdGFza2xldDsKPj4g ICAJc3RydWN0IGlteF9kbWFfZGF0YQkJZGF0YTsKPj4gKwl1bnNpZ25lZCBpbnQgCQkJZW5hYmxl ZDsKPiAKPiBkZXNjcmlwdGlvbiBzYXlzIGJvb2wgYnV0IHRoaXMgaXMgaW50Pwo+IAo+PiAgIH07 Cj4+ICAgCj4+ICAgI2RlZmluZSBJTVhfRE1BX1NHX0xPT1AJCUJJVCgwKQo+PiBAQCAtNTg4LDcg KzU4OSwxMyBAQCBzdGF0aWMgaW50IHNkbWFfY29uZmlnX293bmVyc2hpcChzdHJ1Y3Qgc2RtYV9j aGFubmVsICpzZG1hYywKPj4gICAKPj4gICBzdGF0aWMgdm9pZCBzZG1hX2VuYWJsZV9jaGFubmVs KHN0cnVjdCBzZG1hX2VuZ2luZSAqc2RtYSwgaW50IGNoYW5uZWwpCj4+ICAgewo+PiArCXVuc2ln bmVkIGxvbmcgZmxhZ3M7Cj4+ICsJc3RydWN0IHNkbWFfY2hhbm5lbCAqc2RtYWMgPSAmc2RtYS0+ Y2hhbm5lbFtjaGFubmVsXTsKPiAKPiBFbXB0eSBsaW5lIGhlcmUgcGxlYXNlCj4gCj4+ICAgCXdy aXRlbChCSVQoY2hhbm5lbCksIHNkbWEtPnJlZ3MgKyBTRE1BX0hfU1RBUlQpOwo+PiArCj4+ICsJ c3Bpbl9sb2NrX2lycXNhdmUoJnNkbWFjLT5sb2NrLCBmbGFncyk7Cj4+ICsJc2RtYWMtPmVuYWJs ZWQgPSAxOwo+PiArCXNwaW5fdW5sb2NrX2lycXJlc3RvcmUoJnNkbWFjLT5sb2NrLCBmbGFncyk7 Cj4+ICAgfQo+PiAgIAo+PiAgIC8qCj4+IEBAIC02NzcsNiArNjg0LDE1IEBAIHN0YXRpYyB2b2lk IHNkbWFfdXBkYXRlX2NoYW5uZWxfbG9vcChzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1hYykKPj4g ICAJc3RydWN0IHNkbWFfYnVmZmVyX2Rlc2NyaXB0b3IgKmJkOwo+PiAgIAlpbnQgZXJyb3IgPSAw Owo+PiAgIAllbnVtIGRtYV9zdGF0dXMJb2xkX3N0YXR1cyA9IHNkbWFjLT5zdGF0dXM7Cj4+ICsJ dW5zaWduZWQgbG9uZyBmbGFnczsKPj4gKwo+IAo+IHRoaXMgZW1wdHkgbGluZSBpcyBib2d1cwo+ IAo+PiArCWludCBlbmFibGVkOwo+IAo+IGFuZCBpcyByZXF1aXJlZCBoZXJlLiBFbXB0eSBsaW5l IG5lZWRzIHRvIGJlIGFkZGVkIHRvIGEgZm4gYWZ0ZXIgZGVmaW5pbmcKPiB2YXJpYWJsZXMgYW5k IGJlZm9yZSBjb2RlIHN0YXRlbWVudHMKPiAKPj4gKwlzcGluX2xvY2tfaXJxc2F2ZSgmc2RtYWMt PmxvY2ssIGZsYWdzKTsKPj4gKwllbmFibGVkID0gc2RtYWMtPmVuYWJsZWQ7Cj4+ICsJc3Bpbl91 bmxvY2tfaXJxcmVzdG9yZSgmc2RtYWMtPmxvY2ssIGZsYWdzKTsKPj4gKwo+PiArCWlmICghZW5h YmxlZCkKPj4gKwkJcmV0dXJuOwo+PiAgIAo+PiAgIAkvKgo+PiAgIAkgKiBsb29wIG1vZGUuIEl0 ZXJhdGUgb3ZlciBkZXNjcmlwdG9ycywgcmUtc2V0dXAgdGhlbSBhbmQKPj4gQEAgLTkzMCwxMCAr OTQ2LDE1IEBAIHN0YXRpYyBpbnQgc2RtYV9kaXNhYmxlX2NoYW5uZWwoc3RydWN0IGRtYV9jaGFu ICpjaGFuKQo+PiAgIAlzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1hYyA9IHRvX3NkbWFfY2hhbihj aGFuKTsKPj4gICAJc3RydWN0IHNkbWFfZW5naW5lICpzZG1hID0gc2RtYWMtPnNkbWE7Cj4+ICAg CWludCBjaGFubmVsID0gc2RtYWMtPmNoYW5uZWw7Cj4+ICsJdW5zaWduZWQgbG9uZyBmbGFnczsK Pj4gICAKPj4gICAJd3JpdGVsX3JlbGF4ZWQoQklUKGNoYW5uZWwpLCBzZG1hLT5yZWdzICsgU0RN QV9IX1NUQVRTVE9QKTsKPj4gICAJc2RtYWMtPnN0YXR1cyA9IERNQV9FUlJPUjsKPj4gICAKPj4g KwlzcGluX2xvY2tfaXJxc2F2ZSgmc2RtYWMtPmxvY2ssIGZsYWdzKTsKPj4gKwlzZG1hYy0+ZW5h YmxlZCA9IDA7Cj4+ICsJc3Bpbl91bmxvY2tfaXJxcmVzdG9yZSgmc2RtYWMtPmxvY2ssIGZsYWdz KTsKPj4gKwo+PiAgIAlyZXR1cm4gMDsKPj4gICB9Cj4+ICAgCj4+IC0tIAo+PiAyLjcuNAo+Pgo+ PiAtLQo+PiBUbyB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5z dWJzY3JpYmUgZG1hZW5naW5lIiBpbgo+PiB0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jk b21vQHZnZXIua2VybmVsLm9yZwo+PiBNb3JlIG1ham9yZG9tbyBpbmZvIGF0ICBodHRwOi8vdmdl ci5rZXJuZWwub3JnL21ham9yZG9tby1pbmZvLmh0bWwKPgotLS0KVG8gdW5zdWJzY3JpYmUgZnJv bSB0aGlzIGxpc3Q6IHNlbmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlIGRtYWVuZ2luZSIgaW4KdGhl IGJvZHkgb2YgYSBtZXNzYWdlIHRvIG1ham9yZG9tb0B2Z2VyLmtlcm5lbC5vcmcKTW9yZSBtYWpv cmRvbW8gaW5mbyBhdCAgaHR0cDovL3ZnZXIua2VybmVsLm9yZy9tYWpvcmRvbW8taW5mby5odG1s Cg==