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Fri, 9 Feb 2024 23:52:18 +0000 (GMT) X-AuditID: cbfec36d-acdff700000025ce-cf-65c6bab23583 Received: from SSI-EX2.ssi.samsung.com ( [105.128.3.66]) by ussmgxs3new.samsung.com (USCPEXMTA) with SMTP id 97.EB.50948.2BAB6C56; Fri, 9 Feb 2024 18:52:18 -0500 (EST) Received: from SSI-EX2.ssi.samsung.com (105.128.2.227) by SSI-EX2.ssi.samsung.com (105.128.2.227) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.2375.24; Fri, 9 Feb 2024 15:52:17 -0800 Received: from SSI-EX2.ssi.samsung.com ([105.128.2.227]) by SSI-EX2.ssi.samsung.com ([105.128.2.227]) with mapi id 15.01.2375.024; Fri, 9 Feb 2024 15:52:17 -0800 From: Jim Harris To: Bjorn Helgaas , "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Leon Romanovsky , "Jason Gunthorpe" , Alex Williamson , "pierre.cregut@orange.com" Subject: [PATCH v2 2/2] pci/iov: fix kobject_uevent() ordering in sriov_enable() Thread-Topic: [PATCH v2 2/2] pci/iov: fix kobject_uevent() ordering in sriov_enable() Thread-Index: AQHaW7MDr2cp3vZCgUeCreKO+yDYPA== Date: Fri, 9 Feb 2024 23:52:17 +0000 Message-ID: <170752273749.1693615.1293677023514112939.stgit@bgt-140510-bm01.eng.stellus.in> In-Reply-To: <170752254154.1693615.9176696143128338408.stgit@bgt-140510-bm01.eng.stellus.in> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-ID: <2400EE9658E5F547852121863CD747C6@ssi.samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CFilter-Loop: Reflected X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJKsWRmVeSWpSXmKPExsWy7djX87qbdh1LNfi8zsTi2/8eNoslTRkW V/7tYbTYtOEJi8XlXXPYLM7OO85msf7rezYHdo8Fm0o9epvfsXm0PDvJ5vF+31U2j8+b5AJY o7hsUlJzMstSi/TtErgyVj/6wFiwhbPixPnNrA2MUzi7GDk5JARMJC7fnsvexcjFISSwklGi Y9FSKKeVSaLr8kwWmKpfPyewQSTWMEqsXfWTFcL5yCgx/90LqMxSRolNf5+wgrSwCWhK/Lqy hgkkISJwlUli8uoPzCAJYYEgiQdPXzGC2CIC4RIH3jexQdh6Eidm3GYCsVkEVCS+fnwLVsMr EC2xe+c5sDinQIzEu75NYHMYBcQkvp9aAxZnFhCXuPVkPhPErYISi2bvYYawxST+7XrIBmEr Stz//hLoOQ6gek2J9bv0IVrtJDb1TWSDsBUlpnQ/ZIdYKyhxcuYTqPclJQ6uuMEC8ouEwBkO ibvvZkDtcpHYf/8M1C5pielrLkM1ZEusXN/BBLJLQqBAouFIEETYWmLhn/VQJ/NJ/P31iHEC o/IsJB/MQrhuFpLrZiG5bhaS6xYwsq5iFC8tLs5NTy02zEst1ytOzC0uzUvXS87P3cQITE2n /x3O3cG449ZHvUOMTByMhxglOJiVRHhDlhxJFeJNSaysSi3Kjy8qzUktPsQozcGiJM5raHsy WUggPbEkNTs1tSC1CCbLxMEp1cC0UOzw/p0LjoR4dp9LOpM7b8NG9p1ekd8DAzcozuw04pxm 6Ms3eVVg1+mroQFKV69od/+e051UyTXbZM4bz/sFsi7c9ey/1q3LynzcueGydsrPIoV7LTv2 cnw/EibstXfBJUmTl4lOHIbNTK65LOXr+1z6L126bJmdtd7g1o99xjud/81RXPWUR9NHS/CD rTBva/jdQ7J/4ms+Ol3o/9324kvHU/bIyuU+c10PeqRyOnJcbAxOeL+oKcc5dolyndTcK8YR L5yUyjoeSz+ZU7dBjonZjPH0boXbK3Xr2tZebD+e0ynLnfgk0On809yOS4ee3+S7LSo13SlP JdeY4cGqG56S6/TYUjcmfJr43lKJpTgj0VCLuag4EQABwtNZvAMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrNIsWRmVeSWpSXmKPExsWS2cDspLtp17FUg44HShbf/vewWSxpyrC4 8m8Po8WmDU9YLC7vmsNmcXbecTaL9V/fszmweyzYVOrR2/yOzaPl2Uk2j/f7rrJ5fN4kF8Aa xWWTkpqTWZZapG+XwJWx+tEHxoItnBUnzm9mbWCcwtnFyMkhIWAi8evnBLYuRi4OIYFVjBJN /z4wQzgfGSXedj5jh3CWMkp8uXyCEaSFTUBT4teVNUwgCRGBq0wSk1eDtHByCAsESTx4+gqs SEQgXGLP4oPsELaexIkZt5lAbBYBFYmvH9+C1fAKREvs3nkOLC4EZM+fOBmsnlMgRuJd3yaw mYwCYhLfT60Bq2EWEJe49WQ+E8TdAhJL9pxnhrBFJV4+/scKYStK3P/+EmgOB1C9psT6XfoQ rXYSm/omskHYihJTuh+yQ5wgKHFy5hMWiFZJiYMrbrBMYBSfhWTbLIRJs5BMmoVk0iwkkxYw sq5iFC8tLs5Nryg2zkst1ytOzC0uzUvXS87P3cQIjN/T/w7H7GC8d+uj3iFGJg7GQ4wSHMxK IrwhS46kCvGmJFZWpRblxxeV5qQWH2KU5mBREue9+0AjVUggPbEkNTs1tSC1CCbLxMEp1cBU 6HT4YFyPMENx7U2bpwK//ucua9nLZ5T8eFnxkc49rrPterL2B+/O/33T9cq2UKHZE1gf5nWy W5+d8tdLJODpgz1y7kssmSwsNsvsOmWwNYxt3TTmSbOXzi4/5ZywIcP7l4VY0MW2GfW3DofW 5/3J/Prb0GTeDXWr69wGTNxMO/6KVqyKX3T69oTdD6Tv3fwuWvJ7erVCpTl785TErt2tvgWs 995yXpHd4LX3gYvLnnovy5RrXhmm5x374kSePftvyew5X+Xq9PvXAlTXTmlvEeu19PVf2tJ6 vkzwwMavCZVbynWTYpn+rehh4e1XW2rfLrBW8lur/vm/Ln7rl37NUdpzPmf7lOA1Xxtvuj5T YinOSDTUYi4qTgQAO5jdO04DAAA= X-CMS-MailID: 20240209235218uscas1p2d0978af6623037fa1b9358a2ad2320c5 CMS-TYPE: 301P X-CMS-RootMailID: 20240209235218uscas1p2d0978af6623037fa1b9358a2ad2320c5 References: <170752254154.1693615.9176696143128338408.stgit@bgt-140510-bm01.eng.stellus.in> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790467407461584189 X-GMAIL-MSGID: 1790467407461584189 Wait to call kobject_uevent() until all of the associated changes are done, including updating the num_VFs value. This avoids any possibility of userspace responding to the event and getting a stale value (although probably impossible to actually happen). Suggested-by: Leon Romanovsky Reviewed-by: Leon Romanovsky Signed-off-by: Jim Harris Reviewed-by: Kuppuswamy Sathyanarayanan --- drivers/pci/iov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 0ca20cd518d5..c00b0f822526 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -677,8 +677,8 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) if (rc) goto err_pcibios; - kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE); iov->num_VFs = nr_virtfn; + kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE); return 0;