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: pl08x: be fair when re-assigning physical channel From: Jean-Nicolas Graux Message-Id: <1551711838-19913-1-git-send-email-jean-nicolas.graux@st.com> Date: Mon, 4 Mar 2019 16:03:58 +0100 To: Linus Walleij , Vinod Koul Cc: linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org List-ID: Q3VycmVudCB3YXkgd2UgZmluZCBhIHdhaXRpbmcgdmlydHVhbCBjaGFubmVsIGZvciB0aGUgbmV4 dCB0cmFuc2ZlcgphdCB0aGUgdGltZSBvbmUgcGh5c2ljYWwgY2hhbm5lbCBiZWNvbWVzIGZyZWUg aXMgbm90IHJlYWxseSBmYWlyLgoKTW9yZSBpbiBkZXRhaWxzLCBpbiBjYXNlIHRoZXJlIGlzIG1v cmUgdGhhbiBvbmUgY2hhbm5lbCB3YWl0aW5nIGF0IGEgdGltZSwKYnkganVzdCBnb2luZyB0aHJv dWdoIHRoZSBhcnJheXMgb2YgbWVtY3B5IGFuZCBzbGF2ZSBjaGFubmVscyBhbmQgc3RvcHBpbmcK YXMgc29vbiBhcyBzdGF0ZSBtYXRjaCB3YWl0aW5nIHN0YXRlLCBjaGFubmVscyB3aXRoIGhpZ2gg aW5kZXhlcyBjYW4gYmUKcGVuYWxpemVkLgoKV2hlbmV2ZXIgZG1hIGVuZ2luZSBpcyBzdWJzdGFu dGlhbGx5IG92ZXJsb2FkZWQgc28gdGhhdCB3ZSBjb25zdGFudGx5CmdldCBzZXZlcmFsIGNoYW5u ZWxzIHdhaXRpbmcsIGNoYW5uZWxzIHdpdGggaGlnaGVzdCBpbmRleGVzIG1pZ2h0IG5vdApiZSBz ZXJ2ZWQgZm9yIGEgc3Vic3RhbnRpYWwgdGltZSB3aGljaCBpbiB0aGUgd29yc2UgY2FzZSwgbWln aHQgaGFuZwp0YXNrIHRoYXQgd2FpdCBmb3IgZG1hIHRyYW5zZmVyIHRvIGNvbXBsZXRlLgoKVGhp cyBwYXRjaCBtYWtlcyBwaHlzaWNhbCBjaGFubmVsIHJlLWFzc2lnbm1lbnQgbW9yZSBmYWlyIGJ5 IHN0b3JpbmcKdGltZSBpbiBqaWZmaWVzIHdoZW4gYSBjaGFubmVsIGlzIHB1dCBpbiB3YWl0aW5n IHN0YXRlLiBXaGVuZXZlciBhCnBoeXNpY2FsIGNoYW5uZWwgaGFzIHRvIGJlIHJlLWFzc2lnbmVk LCB0aGlzIHRpbWUgaXMgdXNlZCB0byBzZWxlY3QKY2hhbm5lbCB0aGF0IGlzIHdhaXRpbmcgZm9y IHRoZSBsb25nZXN0IHRpbWUuCgpTaWduZWQtb2ZmLWJ5OiBKZWFuLU5pY29sYXMgR3JhdXggPGpl YW4tbmljb2xhcy5ncmF1eEBzdC5jb20+ClJldmlld2VkLWJ5OiBMaW51cyBXYWxsZWlqIDxsaW51 cy53YWxsZWlqQGxpbmFyby5vcmc+ClJldmlld2VkLWJ5OiBOaWNvbGFzIEd1aW9uIDxuaWNvbGFz Lmd1aW9uQHN0LmNvbT4KLS0tCiBkcml2ZXJzL2RtYS9hbWJhLXBsMDh4LmMgfCAyMiArKysrKysr KysrKysrKysrLS0tLS0tCiAxIGZpbGUgY2hhbmdlZCwgMTYgaW5zZXJ0aW9ucygrKSwgNiBkZWxl dGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL2RtYS9hbWJhLXBsMDh4LmMgYi9kcml2ZXJz L2RtYS9hbWJhLXBsMDh4LmMKaW5kZXggZmM4YzJiYS4uOGNmYzc1MyAxMDA2NDQKLS0tIGEvZHJp dmVycy9kbWEvYW1iYS1wbDA4eC5jCisrKyBiL2RyaXZlcnMvZG1hL2FtYmEtcGwwOHguYwpAQCAt MjU0LDYgKzI1NCw3IEBAIGVudW0gcGwwOHhfZG1hX2NoYW5fc3RhdGUgewogICogQHNsYXZlOiB3 aGV0aGVyIHRoaXMgY2hhbm5lbCBpcyBhIGRldmljZSAoc2xhdmUpIG9yIGZvciBtZW1jcHkKICAq IEBzaWduYWw6IHRoZSBwaHlzaWNhbCBETUEgcmVxdWVzdCBzaWduYWwgd2hpY2ggdGhpcyBjaGFu bmVsIGlzIHVzaW5nCiAgKiBAbXV4X3VzZTogY291bnQgb2YgZGVzY3JpcHRvcnMgdXNpbmcgdGhp cyBETUEgcmVxdWVzdCBzaWduYWwgc2V0dGluZworICogQHdhaXRpbmdfYXQ6IHRpbWUgaW4gamlm ZmllcyB3aGVuIHRoaXMgY2hhbm5lbCBtb3ZlZCB0byB3YWl0aW5nIHN0YXRlCiAgKi8KIHN0cnVj dCBwbDA4eF9kbWFfY2hhbiB7CiAJc3RydWN0IHZpcnRfZG1hX2NoYW4gdmM7CkBAIC0yNjcsNiAr MjY4LDcgQEAgc3RydWN0IHBsMDh4X2RtYV9jaGFuIHsKIAlib29sIHNsYXZlOwogCWludCBzaWdu YWw7CiAJdW5zaWduZWQgbXV4X3VzZTsKKwl1bnNpZ25lZCBsb25nIHdhaXRpbmdfYXQ7CiB9Owog CiAvKioKQEAgLTg3NSw2ICs4NzcsNyBAQCBzdGF0aWMgdm9pZCBwbDA4eF9waHlfYWxsb2NfYW5k X3N0YXJ0KHN0cnVjdCBwbDA4eF9kbWFfY2hhbiAqcGxjaGFuKQogCWlmICghY2gpIHsKIAkJZGV2 X2RiZygmcGwwOHgtPmFkZXYtPmRldiwgIm5vIHBoeXNpY2FsIGNoYW5uZWwgYXZhaWxhYmxlIGZv ciB4ZmVyIG9uICVzXG4iLCBwbGNoYW4tPm5hbWUpOwogCQlwbGNoYW4tPnN0YXRlID0gUEwwOFhf Q0hBTl9XQUlUSU5HOworCQlwbGNoYW4tPndhaXRpbmdfYXQgPSBqaWZmaWVzOwogCQlyZXR1cm47 CiAJfQogCkBAIC05MTMsMjIgKzkxNiwyOSBAQCBzdGF0aWMgdm9pZCBwbDA4eF9waHlfZnJlZShz dHJ1Y3QgcGwwOHhfZG1hX2NoYW4gKnBsY2hhbikKIHsKIAlzdHJ1Y3QgcGwwOHhfZHJpdmVyX2Rh dGEgKnBsMDh4ID0gcGxjaGFuLT5ob3N0OwogCXN0cnVjdCBwbDA4eF9kbWFfY2hhbiAqcCwgKm5l eHQ7Ci0KKwl1bnNpZ25lZCBsb25nIHdhaXRpbmdfYXQ7CiAgcmV0cnk6CiAJbmV4dCA9IE5VTEw7 CisJd2FpdGluZ19hdCA9IGppZmZpZXM7CiAKLQkvKiBGaW5kIGEgd2FpdGluZyB2aXJ0dWFsIGNo YW5uZWwgZm9yIHRoZSBuZXh0IHRyYW5zZmVyLiAqLworCS8qCisJICogRmluZCBhIHdhaXRpbmcg dmlydHVhbCBjaGFubmVsIGZvciB0aGUgbmV4dCB0cmFuc2Zlci4KKwkgKiBUbyBiZSBmYWlyLCB0 aW1lIHdoZW4gZWFjaCBjaGFubmVsIHJlYWNoZWQgd2FpdGluZyBzdGF0ZSBpcyBjb21wYXJlZAor CSAqIHRvIHNlbGVjdCBjaGFubmVsIHRoYXQgaXMgd2FpdGluZyBmb3IgdGhlIGxvbmdlc3QgdGlt ZS4KKwkgKi8KIAlsaXN0X2Zvcl9lYWNoX2VudHJ5KHAsICZwbDA4eC0+bWVtY3B5LmNoYW5uZWxz LCB2Yy5jaGFuLmRldmljZV9ub2RlKQotCQlpZiAocC0+c3RhdGUgPT0gUEwwOFhfQ0hBTl9XQUlU SU5HKSB7CisJCWlmIChwLT5zdGF0ZSA9PSBQTDA4WF9DSEFOX1dBSVRJTkcgJiYKKwkJICAgIHAt PndhaXRpbmdfYXQgPD0gd2FpdGluZ19hdCkgewogCQkJbmV4dCA9IHA7Ci0JCQlicmVhazsKKwkJ CXdhaXRpbmdfYXQgPSBwLT53YWl0aW5nX2F0OwogCQl9CiAKIAlpZiAoIW5leHQgJiYgcGwwOHgt Pmhhc19zbGF2ZSkgewogCQlsaXN0X2Zvcl9lYWNoX2VudHJ5KHAsICZwbDA4eC0+c2xhdmUuY2hh bm5lbHMsIHZjLmNoYW4uZGV2aWNlX25vZGUpCi0JCQlpZiAocC0+c3RhdGUgPT0gUEwwOFhfQ0hB Tl9XQUlUSU5HKSB7CisJCQlpZiAocC0+c3RhdGUgPT0gUEwwOFhfQ0hBTl9XQUlUSU5HICYmCisJ CQkgICAgcC0+d2FpdGluZ19hdCA8PSB3YWl0aW5nX2F0KSB7CiAJCQkJbmV4dCA9IHA7Ci0JCQkJ YnJlYWs7CisJCQkJd2FpdGluZ19hdCA9IHAtPndhaXRpbmdfYXQ7CiAJCQl9CiAJfQogCg==