{"id":2222341,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2222341/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260411080148.471335-17-kwilczynski@kernel.org/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260411080148.471335-17-kwilczynski@kernel.org>","list_archive_url":null,"date":"2026-04-11T08:01:40","name":"[v4,16/24] alpha/PCI: Remove WARN from __pci_mmap_fits()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"6955ab90c594ec0037a2a98a3aa2647bac325064","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/1.2/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260411080148.471335-17-kwilczynski@kernel.org/mbox/","series":[{"id":499539,"url":"http://patchwork.ozlabs.org/api/1.2/series/499539/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=499539","date":"2026-04-11T08:01:24","name":"PCI: Convert all dynamic sysfs attributes to static","version":4,"mbox":"http://patchwork.ozlabs.org/series/499539/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2222341/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2222341/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=Kb0avEzV;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775894569; cv=none;\n b=P7kJTIxhcYv5R3XckeE+vnW4tR1ka/jBBfyT5eArGpBl/AaYGr13OCDVDMIIahgQERQgx7ff1ICj8+RiHr6NchFehVEq/a0EhFW8dCzKlAvfR8jvVSUUica0JGjTMmGxVeAUA1ML37CQeRGiEWU5EjNrPTwEm/t1z8ewpC6PKX4=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775894569; c=relaxed/simple;\n\tbh=Gr3+4m6Cj77hdjiMr0OAiQ4tavCjVjkmMUYZBycpZFE=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=DjbmxBQZytI0JSGB5LTFrbF0C2/cs0D6QR/BJtZi/mj5Nb9KcmK62o5zichbyVN0H2g+zp4kGVNPGTLNIYroZAmCuGyBR+YFX4zQtQ7pPIJZR0Qxy7QLs6hCYp1kEPRmcaQCTILQqWh5xpIDwGG1lP0kiqoVrMDagtSVZnlrPX8=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=Kb0avEzV; arc=none smtp.client-ip=10.30.226.201","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775894569;\n\tbh=Gr3+4m6Cj77hdjiMr0OAiQ4tavCjVjkmMUYZBycpZFE=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Kb0avEzV9ox7btRhxNy1G7gzEzelfJWiEJ9F56x+rcuE1cqzexUGOjxzBJ4YOVg2c\n\t MpDB1ywE6aBdC0PvGpkhA6lNsLEfytObgJMyBVp/afL7mzo3c60vayh8ClyRk2s95U\n\t 1uLu6aTssGggNBfzh/R5v6ljup5C+RagRnX7oYN+ImDGdO1n3qQKdzoB4TKzUfgDIc\n\t 63u5K8Gy70/B8mdWiVdlwr9VUG3dcDm83owr0uX6Otkv403mb40rVZW2g88Dk78931\n\t 9CKg9RTGXi9aLO22p1Ghzyooa6dXg6T1Dblff+34t7FWTOSLi3fUcPnolIL2DuNhbq\n\t +Vm5oTkT1rehQ==","From":"=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ","To":"Bjorn Helgaas ","Cc":"Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi ,\n Magnus Lindholm , Matt Turner ,\n Richard Henderson ,\n Christophe Leroy ,\n Madhavan Srinivasan ,\n Michael Ellerman , Nicholas Piggin ,\n Dexuan Cui ,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= ,\n Lukas Wunner , \"Oliver O'Halloran\" ,\n Saurabh Singh Sengar ,\n Shuan He , Srivatsa Bhat ,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= ,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org","Subject":"[PATCH v4 16/24] alpha/PCI: Remove WARN from __pci_mmap_fits()","Date":"Sat, 11 Apr 2026 08:01:40 +0000","Message-ID":"<20260411080148.471335-17-kwilczynski@kernel.org>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260411080148.471335-1-kwilczynski@kernel.org>","References":"<20260411080148.471335-1-kwilczynski@kernel.org>","Precedence":"bulk","X-Mailing-List":"linux-pci@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit"},"content":"Remove the WARN() that fires when userspace attempts to mmap beyond\nthe BAR bounds. The check still returns 0 to reject the mapping,\nbut the warning is excessive for normal operation.\n\nA similar warning was removed from the PCI core in the commit\n3b519e4ea618 (\"PCI: fix size checks for mmap() on /proc/bus/pci files\").\n\nSigned-off-by: Krzysztof Wilczyński \n---\n arch/alpha/kernel/pci-sysfs.c | 8 +-------\n 1 file changed, 1 insertion(+), 7 deletions(-)","diff":"diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 2748000a7486..c136603ddf2c 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -48,13 +48,7 @@ static int __pci_mmap_fits(struct pci_dev *pdev, int num,\n \tstart = vma->vm_pgoff;\n \tsize = ((len - 1) >> (PAGE_SHIFT - shift)) + 1;\n \n-\tif (start < size && size - start >= nr)\n-\t\treturn 1;\n-\tWARN(1, \"process \\\"%s\\\" tried to map%s 0x%08lx-0x%08lx on %s BAR %d \"\n-\t\t\"(size 0x%08lx)\\n\",\n-\t\tcurrent->comm, sparse ? \" sparse\" : \"\", start, start + nr,\n-\t\tpci_name(pdev), num, size);\n-\treturn 0;\n+\treturn start < size && size - start >= nr;\n }\n \n /**\n","prefixes":["v4","16/24"]}