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Wed, 22 Apr 2026 16:14:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776874479; bh=tPC3J3ZhBEH6py/uCTWgJRVGCTKnpjJlJA0/I3j9P2E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eIy7UripanPcwv0lcuvpN+LC+hvGpFWR4gvFU0nG+S4dMTz0zbh0L0Rro2gNPgIqU MQgN/EIbpsPzR2bfNN5K4/GxS/7qge8+CTlD8vA1Kr990ZENvd73NqkFRZigpT4Juv mtx7SGoHAu4WtHEnmEhNvDJhqsWPzBfRshYvQURZyR3ckGX2rZOtGQiIkOEVmQQYGo 7zAodRktmezQzJRsQVYUp8Dq+oJfmNwREDfqbDAKSU+JJUkt/apjGg7+alxm75ODF4 gQanKXWrYMI1XPIlfvagSjJJitwmQWqgZadMoayLQWWtYzdEHn3EdJ9GrBwFM4wS6F sE0wogHvrgNzQ== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v6 08/24] PCI/sysfs: Warn about BAR resize failure in __resource_resize_store() Date: Wed, 22 Apr 2026 16:13:51 +0000 Message-ID: <20260422161407.118748-9-kwilczynski@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260422161407.118748-1-kwilczynski@kernel.org> References: <20260422161407.118748-1-kwilczynski@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a pci_warn() to __resource_resize_store(), so that BAR resize failures are visible to the user, which can help troubleshoot any potential resource resize issues. While at it, rename the resource_resize_is_visible() to resource_resize_attr_is_visible() along with the corresponding group variable to align with the naming convention used by the resource attribute groups. Also, change the order of pci_dev_groups[] such that the resize group is now located alongside the other resource groups. Signed-off-by: Krzysztof Wilczyński --- drivers/pci/pci-sysfs.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 3508e29f6ad1..c0925bdc9ecd 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1703,6 +1703,9 @@ static ssize_t __resource_resize_store(struct device *dev, int n, sysfs_remove_groups(&pdev->dev.kobj, pci_dev_resource_attr_groups); ret = pci_resize_resource(pdev, n, size, 0); + if (ret) + pci_warn(pdev, "Failed to resize BAR %d: %pe\n", + n, ERR_PTR(ret)); pci_assign_unassigned_bus_resources(bus); @@ -1750,7 +1753,7 @@ static struct attribute *resource_resize_attrs[] = { NULL, }; -static umode_t resource_resize_is_visible(struct kobject *kobj, +static umode_t resource_resize_attr_is_visible(struct kobject *kobj, struct attribute *a, int n) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); @@ -1758,9 +1761,9 @@ static umode_t resource_resize_is_visible(struct kobject *kobj, return pci_rebar_get_current_size(pdev, n) < 0 ? 0 : a->mode; } -static const struct attribute_group pci_dev_resource_resize_group = { +static const struct attribute_group pci_dev_resource_resize_attr_group = { .attrs = resource_resize_attrs, - .is_visible = resource_resize_is_visible, + .is_visible = resource_resize_attr_is_visible, }; int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) @@ -1881,6 +1884,7 @@ const struct attribute_group *pci_dev_groups[] = { &pci_dev_resource_uc_attr_group, &pci_dev_resource_wc_attr_group, #endif + &pci_dev_resource_resize_attr_group, &pci_dev_config_attr_group, &pci_dev_rom_attr_group, &pci_dev_reset_attr_group, @@ -1892,7 +1896,6 @@ const struct attribute_group *pci_dev_groups[] = { #ifdef CONFIG_ACPI &pci_dev_acpi_attr_group, #endif - &pci_dev_resource_resize_group, ARCH_PCI_DEV_GROUPS NULL, }; -- 2.54.0