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: [v3] imx-sdma: fix pagefault when channel is disabled during interrupt From: Vinod Koul Message-Id: <20180305113421.GP15443@localhost> Date: Mon, 5 Mar 2018 17:04:21 +0530 To: Thierry Bultel Cc: dmaengine@vger.kernel.org List-ID: T24gVHVlLCBGZWIgMjcsIDIwMTggYXQgMDQ6MTQ6MzhQTSArMDEwMCwgVGhpZXJyeSBCdWx0ZWwg d3JvdGU6Cj4gQWRkIGEgc3BpbmxvY2sgYW5kIGFuICdlbmFibGVkJyBib29sZWFuIG9uIGNoYW5u ZWwgZGVzY3JpcHRvciwgdG8gYXZvaWQKPiB1c2luZyBidWZmZXIgZGVzY3JpcHRvcnMgaW4gdGhl IGludGVycnVwdCBjb250ZXh0LAo+IHdoZW4gc2RtYV9kaXNhYmxlX2NoYW5uZWwgaXMgY2FsbGVk IG1lYW53aGlsZS4KPiAKPiBTaWduZWQtb2ZmLWJ5OiBUaGllcnJ5IEJ1bHRlbCA8dGJ1bHRlbEBw aXhlbHN1cm1lci5jb20+Cj4gLS0tCj4gCj4gQ2hhbmdlcyBzaW5jZSBWMjoKPiAgKiBBcHBsaWVk IFZpbm9kIEtvdWwncyByZXZpZXcgYWJvdXQgZW1wdHkgbGluZXMKPiAKPiBDaGFuZ2VzIHNpbmNl IFYxOgo+ICAqIEFwcGxpZWQgU2h1bnlvbmcgWWFuZydzIHJldmlldyBhZHZpY2U6Cj4gICogVXNl IGEgYm9vbCB0eXBlIGZvciB0aGUgZW5hYmxlZCBmaWVsZAo+ICAqIEZpeGVkIHRoZSByYWNlIGNv bmRpdGlvbgo+IAo+ICBkcml2ZXJzL2RtYS9pbXgtc2RtYS5jIHwgMjAgKysrKysrKysrKysrKysr KysrKysKPiAgMSBmaWxlIGNoYW5nZWQsIDIwIGluc2VydGlvbnMoKykKPiAKPiBkaWZmIC0tZ2l0 IGEvZHJpdmVycy9kbWEvaW14LXNkbWEuYyBiL2RyaXZlcnMvZG1hL2lteC1zZG1hLmMKPiBpbmRl eCBkMTY1MWE1Li4wZGY2ZDU0IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZG1hL2lteC1zZG1hLmMK PiArKysgYi9kcml2ZXJzL2RtYS9pbXgtc2RtYS5jCj4gQEAgLTMzMCw2ICszMzAsNyBAQCBzdHJ1 Y3Qgc2RtYV9jaGFubmVsIHsKPiAgCXVuc2lnbmVkIGludAkJCWNobl9yZWFsX2NvdW50Owo+ICAJ c3RydWN0IHRhc2tsZXRfc3RydWN0CQl0YXNrbGV0Owo+ICAJc3RydWN0IGlteF9kbWFfZGF0YQkJ ZGF0YTsKPiArCWJvb2wJCQkJZW5hYmxlZDsKPiAgfTsKPiAgCj4gICNkZWZpbmUgSU1YX0RNQV9T R19MT09QCQlCSVQoMCkKPiBAQCAtNTg4LDcgKzU4OSwxMyBAQCBzdGF0aWMgaW50IHNkbWFfY29u ZmlnX293bmVyc2hpcChzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1hYywKPiAgCj4gIHN0YXRpYyB2 b2lkIHNkbWFfZW5hYmxlX2NoYW5uZWwoc3RydWN0IHNkbWFfZW5naW5lICpzZG1hLCBpbnQgY2hh bm5lbCkKPiAgewo+ICsJdW5zaWduZWQgbG9uZyBmbGFnczsKPiArCXN0cnVjdCBzZG1hX2NoYW5u ZWwgKnNkbWFjID0gJnNkbWEtPmNoYW5uZWxbY2hhbm5lbF07Cgp3ZSBuZWVkIGFuIGVtcHR5IGxp bmUgaGVyZSB0b28uLi4KCj4gIAl3cml0ZWwoQklUKGNoYW5uZWwpLCBzZG1hLT5yZWdzICsgU0RN QV9IX1NUQVJUKTsKPiArCj4gKwlzcGluX2xvY2tfaXJxc2F2ZSgmc2RtYWMtPmxvY2ssIGZsYWdz KTsKPiArCXNkbWFjLT5lbmFibGVkID0gMTsKPiArCXNwaW5fdW5sb2NrX2lycXJlc3RvcmUoJnNk bWFjLT5sb2NrLCBmbGFncyk7Cj4gIH0KPiAgCj4gIC8qCj4gQEAgLTY3Nyw2ICs2ODQsMTQgQEAg c3RhdGljIHZvaWQgc2RtYV91cGRhdGVfY2hhbm5lbF9sb29wKHN0cnVjdCBzZG1hX2NoYW5uZWwg KnNkbWFjKQo+ICAJc3RydWN0IHNkbWFfYnVmZmVyX2Rlc2NyaXB0b3IgKmJkOwo+ICAJaW50IGVy cm9yID0gMDsKPiAgCWVudW0gZG1hX3N0YXR1cwlvbGRfc3RhdHVzID0gc2RtYWMtPnN0YXR1czsK PiArCXVuc2lnbmVkIGxvbmcgZmxhZ3M7Cj4gKwo+ICsJc3Bpbl9sb2NrX2lycXNhdmUoJnNkbWFj LT5sb2NrLCBmbGFncyk7Cj4gKwlpZiAoIXNkbWFjLT5lbmFibGVkKSB7Cj4gKwkJc3Bpbl91bmxv Y2tfaXJxcmVzdG9yZSgmc2RtYWMtPmxvY2ssIGZsYWdzKTsKPiArCQlyZXR1cm47Cj4gKwl9Cj4g KwlzcGluX3VubG9ja19pcnFyZXN0b3JlKCZzZG1hYy0+bG9jaywgZmxhZ3MpOwo+ICAKPiAgCS8q Cj4gIAkgKiBsb29wIG1vZGUuIEl0ZXJhdGUgb3ZlciBkZXNjcmlwdG9ycywgcmUtc2V0dXAgdGhl bSBhbmQKPiBAQCAtOTMwLDEwICs5NDUsMTUgQEAgc3RhdGljIGludCBzZG1hX2Rpc2FibGVfY2hh bm5lbChzdHJ1Y3QgZG1hX2NoYW4gKmNoYW4pCj4gIAlzdHJ1Y3Qgc2RtYV9jaGFubmVsICpzZG1h YyA9IHRvX3NkbWFfY2hhbihjaGFuKTsKPiAgCXN0cnVjdCBzZG1hX2VuZ2luZSAqc2RtYSA9IHNk bWFjLT5zZG1hOwo+ICAJaW50IGNoYW5uZWwgPSBzZG1hYy0+Y2hhbm5lbDsKPiArCXVuc2lnbmVk IGxvbmcgZmxhZ3M7Cj4gIAo+ICAJd3JpdGVsX3JlbGF4ZWQoQklUKGNoYW5uZWwpLCBzZG1hLT5y ZWdzICsgU0RNQV9IX1NUQVRTVE9QKTsKPiAgCXNkbWFjLT5zdGF0dXMgPSBETUFfRVJST1I7Cj4g IAo+ICsJc3Bpbl9sb2NrX2lycXNhdmUoJnNkbWFjLT5sb2NrLCBmbGFncyk7Cj4gKwlzZG1hYy0+ ZW5hYmxlZCA9IDA7Cj4gKwlzcGluX3VubG9ja19pcnFyZXN0b3JlKCZzZG1hYy0+bG9jaywgZmxh Z3MpOwo+ICsKPiAgCXJldHVybiAwOwo+ICB9Cj4gIAo+IC0tIAo+IDIuNy40Cj4gCj4gLS0KPiBU byB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUg ZG1hZW5naW5lIiBpbgo+IHRoZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdlci5r ZXJuZWwub3JnCj4gTW9yZSBtYWpvcmRvbW8gaW5mbyBhdCAgaHR0cDovL3ZnZXIua2VybmVsLm9y Zy9tYWpvcmRvbW8taW5mby5odG1sCg==