[PATCH 4.18 164/350] nvmem: check the return value of nvmem_add_cells()

From: Greg Kroah-Hartman
Date: Sun Nov 11 2018 - 18:27:08 EST


4.18-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>

[ Upstream commit fa72d847d68d7833b77a4bef944cf2c5baf56f49 ]

This function can fail so check its return value in nvmem_register()
and act accordingly.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nvmem/core.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -518,11 +518,17 @@ struct nvmem_device *nvmem_register(cons
goto err_device_del;
}

- if (config->cells)
- nvmem_add_cells(nvmem, config->cells, config->ncells);
+ if (config->cells) {
+ rval = nvmem_add_cells(nvmem, config->cells, config->ncells);
+ if (rval)
+ goto err_teardown_compat;
+ }

return nvmem;

+err_teardown_compat:
+ if (config->compat)
+ device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom);
err_device_del:
device_del(&nvmem->dev);
err_put_device: