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: Vinod Koul Message-Id: <20180227150127.GA15443@localhost> Date: Tue, 27 Feb 2018 20:31:27 +0530 To: Thierry Bultel Cc: dmaengine@vger.kernel.org List-ID: T24gVHVlLCBGZWIgMTMsIDIwMTggYXQgMDk6NDc6MjNBTSArMDEwMCwgVGhpZXJyeSBCdWx0ZWwg d3JvdGU6Cj4gQWRkIGEgc3BpbmxvY2sgYW5kIGEgJ2VuYWJsZWQnIGJvb2xlYW4gb24gY2hhbm5l bCBkZXNjcmlwdG9yLCB0byBhdm9pZAo+IHVzaW5nIGJ1ZmZlciBkZXNjcmlwdG9ycyBpbiB0aGUg aW50ZXJydXB0IGNvbnRleHQsCj4gc2RtYV9kaXNhYmxlX2NoYW5uZWwgaXMgY2FsbGVkIG1lYW53 aGlsZS4KPiAtLS0KPiAgZHJpdmVycy9kbWEvaW14LXNkbWEuYyB8IDIxICsrKysrKysrKysrKysr KysrKysrKwo+ICAxIGZpbGUgY2hhbmdlZCwgMjEgaW5zZXJ0aW9ucygrKQo+IAo+IGRpZmYgLS1n aXQgYS9kcml2ZXJzL2RtYS9pbXgtc2RtYS5jIGIvZHJpdmVycy9kbWEvaW14LXNkbWEuYwo+IGlu ZGV4IGQxNjUxYTUuLjdlYWI0MmIgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9kbWEvaW14LXNkbWEu Ywo+ICsrKyBiL2RyaXZlcnMvZG1hL2lteC1zZG1hLmMKPiBAQCAtMzMwLDYgKzMzMCw3IEBAIHN0 cnVjdCBzZG1hX2NoYW5uZWwgewo+ICAJdW5zaWduZWQgaW50CQkJY2huX3JlYWxfY291bnQ7Cj4g IAlzdHJ1Y3QgdGFza2xldF9zdHJ1Y3QJCXRhc2tsZXQ7Cj4gIAlzdHJ1Y3QgaW14X2RtYV9kYXRh CQlkYXRhOwo+ICsJdW5zaWduZWQgaW50IAkJCWVuYWJsZWQ7CgpkZXNjcmlwdGlvbiBzYXlzIGJv b2wgYnV0IHRoaXMgaXMgaW50PwoKPiAgfTsKPiAgCj4gICNkZWZpbmUgSU1YX0RNQV9TR19MT09Q CQlCSVQoMCkKPiBAQCAtNTg4LDcgKzU4OSwxMyBAQCBzdGF0aWMgaW50IHNkbWFfY29uZmlnX293 bmVyc2hpcChzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1hYywKPiAgCj4gIHN0YXRpYyB2b2lkIHNk bWFfZW5hYmxlX2NoYW5uZWwoc3RydWN0IHNkbWFfZW5naW5lICpzZG1hLCBpbnQgY2hhbm5lbCkK PiAgewo+ICsJdW5zaWduZWQgbG9uZyBmbGFnczsKPiArCXN0cnVjdCBzZG1hX2NoYW5uZWwgKnNk bWFjID0gJnNkbWEtPmNoYW5uZWxbY2hhbm5lbF07CgpFbXB0eSBsaW5lIGhlcmUgcGxlYXNlCgo+ ICAJd3JpdGVsKEJJVChjaGFubmVsKSwgc2RtYS0+cmVncyArIFNETUFfSF9TVEFSVCk7Cj4gKwo+ ICsJc3Bpbl9sb2NrX2lycXNhdmUoJnNkbWFjLT5sb2NrLCBmbGFncyk7Cj4gKwlzZG1hYy0+ZW5h YmxlZCA9IDE7Cj4gKwlzcGluX3VubG9ja19pcnFyZXN0b3JlKCZzZG1hYy0+bG9jaywgZmxhZ3Mp Owo+ICB9Cj4gIAo+ICAvKgo+IEBAIC02NzcsNiArNjg0LDE1IEBAIHN0YXRpYyB2b2lkIHNkbWFf dXBkYXRlX2NoYW5uZWxfbG9vcChzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1hYykKPiAgCXN0cnVj dCBzZG1hX2J1ZmZlcl9kZXNjcmlwdG9yICpiZDsKPiAgCWludCBlcnJvciA9IDA7Cj4gIAllbnVt IGRtYV9zdGF0dXMJb2xkX3N0YXR1cyA9IHNkbWFjLT5zdGF0dXM7Cj4gKwl1bnNpZ25lZCBsb25n IGZsYWdzOwo+ICsKCnRoaXMgZW1wdHkgbGluZSBpcyBib2d1cwoKPiArCWludCBlbmFibGVkOwoK YW5kIGlzIHJlcXVpcmVkIGhlcmUuIEVtcHR5IGxpbmUgbmVlZHMgdG8gYmUgYWRkZWQgdG8gYSBm biBhZnRlciBkZWZpbmluZwp2YXJpYWJsZXMgYW5kIGJlZm9yZSBjb2RlIHN0YXRlbWVudHMKCj4g KwlzcGluX2xvY2tfaXJxc2F2ZSgmc2RtYWMtPmxvY2ssIGZsYWdzKTsKPiArCWVuYWJsZWQgPSBz ZG1hYy0+ZW5hYmxlZDsKPiArCXNwaW5fdW5sb2NrX2lycXJlc3RvcmUoJnNkbWFjLT5sb2NrLCBm bGFncyk7Cj4gKwo+ICsJaWYgKCFlbmFibGVkKQo+ICsJCXJldHVybjsKPiAgCj4gIAkvKgo+ICAJ ICogbG9vcCBtb2RlLiBJdGVyYXRlIG92ZXIgZGVzY3JpcHRvcnMsIHJlLXNldHVwIHRoZW0gYW5k Cj4gQEAgLTkzMCwxMCArOTQ2LDE1IEBAIHN0YXRpYyBpbnQgc2RtYV9kaXNhYmxlX2NoYW5uZWwo c3RydWN0IGRtYV9jaGFuICpjaGFuKQo+ICAJc3RydWN0IHNkbWFfY2hhbm5lbCAqc2RtYWMgPSB0 b19zZG1hX2NoYW4oY2hhbik7Cj4gIAlzdHJ1Y3Qgc2RtYV9lbmdpbmUgKnNkbWEgPSBzZG1hYy0+ c2RtYTsKPiAgCWludCBjaGFubmVsID0gc2RtYWMtPmNoYW5uZWw7Cj4gKwl1bnNpZ25lZCBsb25n IGZsYWdzOwo+ICAKPiAgCXdyaXRlbF9yZWxheGVkKEJJVChjaGFubmVsKSwgc2RtYS0+cmVncyAr IFNETUFfSF9TVEFUU1RPUCk7Cj4gIAlzZG1hYy0+c3RhdHVzID0gRE1BX0VSUk9SOwo+ICAKPiAr CXNwaW5fbG9ja19pcnFzYXZlKCZzZG1hYy0+bG9jaywgZmxhZ3MpOwo+ICsJc2RtYWMtPmVuYWJs ZWQgPSAwOwo+ICsJc3Bpbl91bmxvY2tfaXJxcmVzdG9yZSgmc2RtYWMtPmxvY2ssIGZsYWdzKTsK PiArCj4gIAlyZXR1cm4gMDsKPiAgfQo+ICAKPiAtLSAKPiAyLjcuNAo+IAo+IC0tCj4gVG8gdW5z dWJzY3JpYmUgZnJvbSB0aGlzIGxpc3Q6IHNlbmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlIGRtYWVu Z2luZSIgaW4KPiB0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21vQHZnZXIua2VybmVs Lm9yZwo+IE1vcmUgbWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFq b3Jkb21vLWluZm8uaHRtbAo=