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Wysocki" To: Bjorn Helgaas Cc: Rodrigo Vivi , Lukas Wunner , LKML , Linux ACPI , Linux PCI , Linux PM , Mika Westerberg Subject: [PATCH v1 0/2] PCI: hotplug: Add checks to avoid doing hotplug on PCIe Upstream Ports Date: Mon, 21 Nov 2022 19:13:15 +0100 Message-ID: <5623410.DvuYhMxLoT@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.163.140 X-CLIENT-HOSTNAME: 213.134.163.140 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrheeigdduuddtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepffffffekgfehheffleetieevfeefvefhleetjedvvdeijeejledvieehueevueffnecukfhppedvudefrddufeegrdduieefrddugedtnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudeifedrudegtddphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepkedprhgtphhtthhopehhvghlghgrrghssehkvghrnhgvlhdrohhrghdprhgtphhtthhopehrohgurhhighhordhvihhvihesihhnthgvlhdrtghomhdprhgtphhtthhopehluhhkrghsseifuhhnnhgvrhdruggvpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgv rhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqphgtihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehmihhkrgdrfigvshhtvghrsggvrhhgsehlihhnuhigrdhinhhtvghlrdgtohhm X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750130816848289517?= X-GMAIL-MSGID: =?utf-8?q?1750130816848289517?= Hi All, PCIe Upstream Ports are not hotplug-capable by definition, but it turns out that in some cases, if the system is configured in a particularly interesting way, the kernel may be made attempt to operate an Upstream Port as a hotplug one which causes functional issues to appear. The following 2 patches amend the code to prevent this behavior from occurring. Thanks!