6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yongzhi Liu <hyperlyzcs@xxxxxxxxx>
commit 086c6cbcc563c81d55257f9b27e14faf1d0963d3 upstream.
When auxiliary_device_add() returns error and then calls
auxiliary_device_uninit(), callback function
gp_auxiliary_device_release() calls ida_free() and
kfree(aux_device_wrapper) to free memory. We should't
call them again in the error handling path.
Fix this by skipping the redundant cleanup functions.
Fixes: 393fc2f5948f ("misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device.")
Signed-off-by: Yongzhi Liu <hyperlyzcs@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240523121434.21855-3-hyperlyzcs@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
@@ -111,6 +111,7 @@ static int gp_aux_bus_probe(struct pci_d
err_aux_dev_add_1:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
+ goto err_aux_dev_add_0;
err_aux_dev_init_1:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[1]->aux_dev.id);
@@ -120,6 +121,7 @@ err_ida_alloc_1:
err_aux_dev_add_0:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
+ goto err_ret;
err_aux_dev_init_0:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[0]->aux_dev.id);
@@ -127,6 +129,7 @@ err_aux_dev_init_0:
err_ida_alloc_0:
kfree(aux_bus->aux_device_wrapper[0]);
+err_ret:
return retval;
}
