From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH 4/7] iommu/arm-smmu: Check for num_context_irqs > 0 to avoid divide by zero exception Date: Tue, 24 Sep 2013 16:40:48 +0100 Message-ID: <20130924154048.GE20774@mudshark.cambridge.arm.com> References: <1380035221-11576-1-git-send-email-andreas.herrmann@calxeda.com> <1380035221-11576-5-git-send-email-andreas.herrmann@calxeda.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1380035221-11576-5-git-send-email-andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Andreas Herrmann Cc: "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , Rob Herring , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" List-Id: iommu@lists.linux-foundation.org T24gVHVlLCBTZXAgMjQsIDIwMTMgYXQgMDQ6MDY6NThQTSArMDEwMCwgQW5kcmVhcyBIZXJybWFu biB3cm90ZToKPiBXaXRoIHRoZSByaWdodCAob3Igd3Jvbmc7LSkgZGVmaW5pdGlvbiBvZiB2MSBT TU1VIG5vZGUgaW4gRFRCIGl0IGlzCj4gcG9zc2libGUgdG8gdHJpZ2dlciBhIGRpdmlzaW9uIGJ5 IHplcm8gaW4gYXJtX3NtbXVfaW5pdF9kb21haW5fY29udGV4dAo+IChpZiBudW1iZXIgb2YgY29u dGV4dCBpcnFzIGlzIDApOgo+IAo+ICAgICAgICBpZiAoc21tdS0+dmVyc2lvbiA9PSAxKSB7Cj4g ICAgICAgICAgICAgICAgcm9vdF9jZmctPmlycHRuZHggPSBhdG9taWNfaW5jX3JldHVybigmc21t dS0+aXJwdG5keCk7Cj4gIOKGkiAgICAgICAgICAgICByb290X2NmZy0+aXJwdG5keCAlPSBzbW11 LT5udW1fY29udGV4dF9pcnFzOwo+ICAgICAgICB9IGVsc2Ugewo+IAo+IEF2b2lkIHRoaXMgYnkg Y2hlY2tpbmcgZm9yIG51bV9jb250ZXh0X2lycXMgPiAwIGJlZm9yZSB0cnlpbmcgdG8KPiBhc3Np Z24gaW50ZXJydXB0cyB0byBjb250ZXh0cy4KPiAKPiBTaWduZWQtb2ZmLWJ5OiBBbmRyZWFzIEhl cnJtYW5uIDxhbmRyZWFzLmhlcnJtYW5uQGNhbHhlZGEuY29tPgo+IC0tLQo+ICBkcml2ZXJzL2lv bW11L2FybS1zbW11LmMgfCAgIDMxICsrKysrKysrKysrKysrKysrLS0tLS0tLS0tLS0tLS0KPiAg MSBmaWxlIGNoYW5nZWQsIDE3IGluc2VydGlvbnMoKyksIDE0IGRlbGV0aW9ucygtKQo+IAo+IGRp ZmYgLS1naXQgYS9kcml2ZXJzL2lvbW11L2FybS1zbW11LmMgYi9kcml2ZXJzL2lvbW11L2FybS1z bW11LmMKPiBpbmRleCBmNWE4NTZlLi4wZGZkMjU1IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvaW9t bXUvYXJtLXNtbXUuYwo+ICsrKyBiL2RyaXZlcnMvaW9tbXUvYXJtLXNtbXUuYwo+IEBAIC04Mjgs MjEgKzgyOCwyNCBAQCBzdGF0aWMgaW50IGFybV9zbW11X2luaXRfZG9tYWluX2NvbnRleHQoc3Ry dWN0IGlvbW11X2RvbWFpbiAqZG9tYWluLAo+ICAJCXJldHVybiByZXQ7Cj4gIAo+ICAJcm9vdF9j ZmctPmNibmR4ID0gcmV0Owo+IC0JaWYgKHNtbXUtPnZlcnNpb24gPT0gMSkgewo+IC0JCXJvb3Rf Y2ZnLT5pcnB0bmR4ID0gYXRvbWljX2luY19yZXR1cm4oJnNtbXUtPmlycHRuZHgpOwo+IC0JCXJv b3RfY2ZnLT5pcnB0bmR4ICU9IHNtbXUtPm51bV9jb250ZXh0X2lycXM7Cj4gLQl9IGVsc2Ugewo+ IC0JCXJvb3RfY2ZnLT5pcnB0bmR4ID0gcm9vdF9jZmctPmNibmR4Owo+IC0JfQo+ICAKPiAtCWly cSA9IHNtbXUtPmlycXNbc21tdS0+bnVtX2dsb2JhbF9pcnFzICsgcm9vdF9jZmctPmlycHRuZHhd Owo+IC0JcmV0ID0gcmVxdWVzdF9pcnEoaXJxLCBhcm1fc21tdV9jb250ZXh0X2ZhdWx0LCBJUlFG X1NIQVJFRCwKPiAtCQkJICAiYXJtLXNtbXUtY29udGV4dC1mYXVsdCIsIGRvbWFpbik7Cj4gLQlp ZiAoSVNfRVJSX1ZBTFVFKHJldCkpIHsKPiAtCQlkZXZfZXJyKHNtbXUtPmRldiwgImZhaWxlZCB0 byByZXF1ZXN0IGNvbnRleHQgSVJRICVkICgldSlcbiIsCj4gLQkJCXJvb3RfY2ZnLT5pcnB0bmR4 LCBpcnEpOwo+IC0JCXJvb3RfY2ZnLT5pcnB0bmR4ID0gLTE7Cj4gLQkJZ290byBvdXRfZnJlZV9j b250ZXh0Owo+ICsJaWYgKHNtbXUtPm51bV9jb250ZXh0X2lycXMpIHsKCkNhbiB3ZSBtb3ZlIHRo aXMgY2hlY2sgdG8gcHJvYmUgdGltZSwgdG8gYXZvaWQgcmUtZXZhbHVhdGluZyBpdCBldmVyeSB0 aW1lCndlIGluaXRpYWxpc2UgYSBuZXcgZG9tYWluPwoKV2lsbApfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlz dHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3Jn L21haWxtYW4vbGlzdGluZm8vaW9tbXU=