From: Yuan Can yuancan@huawei.com
[ Upstream commit 280c0f7cd0aa4d190619b18243110e052a90775c ]
A problem about ionic create debugfs failed is triggered with the following log given:
[ 415.799514] debugfs: Directory 'ionic' with parent '/' already present!
The reason is that ionic_init_module() returns ionic_bus_register_driver() directly without checking its return value, if ionic_bus_register_driver() failed, it returns without destroy the newly created debugfs, resulting the debugfs of ionic can never be created later.
ionic_init_module() ionic_debugfs_create() # create debugfs directory ionic_bus_register_driver() pci_register_driver() driver_register() bus_add_driver() priv = kzalloc(...) # OOM happened # return without destroy debugfs directory
Fix by removing debugfs when ionic_bus_register_driver() returns error.
Fixes: fbfb8031533c ("ionic: Add hardware init and device commands") Signed-off-by: Yuan Can yuancan@huawei.com Acked-by: Shannon Nelson snelson@pensando.io Link: https://lore.kernel.org/r/20221113092929.19161-1-yuancan@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/pensando/ionic/ionic_main.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c index f60ffef33e0c..00b6985edea0 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_main.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c @@ -569,8 +569,14 @@ int ionic_port_reset(struct ionic *ionic)
static int __init ionic_init_module(void) { + int ret; + ionic_debugfs_create(); - return ionic_bus_register_driver(); + ret = ionic_bus_register_driver(); + if (ret) + ionic_debugfs_destroy(); + + return ret; }
static void __exit ionic_cleanup_module(void)