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Tue, 02 Jun 2020 09:06:13 +0200 Subject: Re: iommu: Improve exception handling in iommu_group_alloc() To: Baolin Wang , iommu@lists.linux-foundation.org References: <9f8d8308-2056-8e33-7b38-0b7d96e51c3c@web.de> <20200602015044.GA89266@VM20190228-100.tbsite.net> <20200602055639.GB89266@VM20190228-100.tbsite.net> From: Markus Elfring Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: <44b4a048-ef36-f75b-5869-22e5fe4b15d2@web.de> Date: Tue, 2 Jun 2020 09:06:12 +0200 User-Agent: Mozilla/5.0 (X11; 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charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Pj4gRG8geW91IGRpc2FncmVlIHRvIHRoZSBhcHBsaWNhdGlvbiBvZiB0aGUgTGludXggY29kaW5n IHN0eWxlIHRoZW4KPj4gZm9yIHRoZSByZWNvbW1lbmRlZCBleGNlcHRpb24gaGFuZGxpbmc/Cj4K PiBObywgdGhhdCdzIG5vdCB3aGF0IEkgbWVhbi4gTXkgcG9pbnQgaXMgdGhlIGV4Y2VwdGlvbiBo YW5kbGluZyBpbiB0aGlzCj4gcGF0Y2ggaXMgc2ltcGxlIGFuZCBubyBuZWVkIHRvIGFkZCAnZ290 bycgc3RhdGVtZW50IHdoaWNoIGRvZXMgbm90IGhlbHAKPiB0byBpbXByb3ZlIHJlYWRhYmlsaXR5 LgoKRG8gd2UgY29tZSBhbG9uZyBkaWZmZXJlbnQgcHJvZ3JhbW1pbmcgaW1hZ2luYXRpb25zPwoK Cj4gQW5kIEkgYWdyZWUgaXQgaXMgaGVscGZ1bCBmb3IgdGhlIGNhc2VzIHdoZXJlIGEgZnVuY3Rp b24gZXhpdHMgZnJvbSBtdWx0aXBsZSBsb2NhdGlvbnMKPiBhbmQgbW9yZSBzYW1lIGNsZWFudXAg d29yayBuZWVkIHRvIGRvLgoKQ2FuIHRoaXMgdmlldyBmaXQgYWxzbyB0byBjYWxscyBvZiB0aGUg ZnVuY3Rpb24g4oCca29iamVjdF9wdXTigJ0/Cmh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL3BhdGNo d29yay9wYXRjaC8xMjUxMzI2LwpodHRwczovL2xvcmUua2VybmVsLm9yZy9saW51eC1pb21tdS84 YmZkMDE4ZWY0YWRkMDgzYTM1YTZhOTRhOGRhMDQ1Y2YzYWY1MWI2LjE1OTEwNjMyNzEuZ2l0LmJh b2xpbi53YW5nQGxpbnV4LmFsaWJhYmEuY29tLwpodHRwczovL2dpdC5rZXJuZWwub3JnL3B1Yi9z Y20vbGludXgva2VybmVsL2dpdC90b3J2YWxkcy9saW51eC5naXQvdHJlZS9kcml2ZXJzL2lvbW11 L2lvbW11LmM/aWQ9N2NjMzE2MTM3MzRjNDg3MGFlMzJmNTI2NWQ1NzZlZjI5NjYyMTM0MyNuNDc4 Cmh0dHBzOi8vZWxpeGlyLmJvb3RsaW4uY29tL2xpbnV4L3Y1Ljcvc291cmNlL2RyaXZlcnMvaW9t bXUvaW9tbXUuYyNMNDc4CgpSZWdhcmRzLApNYXJrdXMKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxp bnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWls bWFuL2xpc3RpbmZvL2lvbW11