5.4-stable review patch. If anyone has any objections, please let me know.
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From: Damien Le Moal dlemoal@kernel.org
commit 910bdb8197f9322790c738bb32feaa11dba26909 upstream.
An endpoint driver configfs attributes group is added to the epf_group list of struct pci_epf_driver by pci_epf_add_cfs() but an added group is not removed from this list when the attribute group is unregistered with pci_ep_cfs_remove_epf_group().
Add the missing list_del() call in pci_ep_cfs_remove_epf_group() to correctly remove the attribute group from the driver list.
With this change, once the loop over all attribute groups in pci_epf_remove_cfs() completes, the driver epf_group list should be empty. Add a WARN_ON() to make sure of that.
Fixes: ef1433f717a2 ("PCI: endpoint: Create configfs entry for each pci_epf_device_id table entry") Signed-off-by: Damien Le Moal dlemoal@kernel.org Signed-off-by: Manivannan Sadhasivam mani@kernel.org Reviewed-by: Niklas Cassel cassel@kernel.org Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250624114544.342159-3-dlemoal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/endpoint/pci-ep-cfs.c | 1 + drivers/pci/endpoint/pci-epf-core.c | 1 + 2 files changed, 2 insertions(+)
--- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -480,6 +480,7 @@ void pci_ep_cfs_remove_epf_group(struct if (IS_ERR_OR_NULL(group)) return;
+ list_del(&group->group_entry); configfs_unregister_default_group(group); } EXPORT_SYMBOL(pci_ep_cfs_remove_epf_group); --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -155,6 +155,7 @@ static void pci_epf_remove_cfs(struct pc mutex_lock(&pci_epf_mutex); list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry) pci_ep_cfs_remove_epf_group(group); + WARN_ON(!list_empty(&driver->epf_group)); mutex_unlock(&pci_epf_mutex); }