From: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com
[ Upstream commit ef0de747f7ad179c7698a5b0e28db05f18ecbf57 ]
During probe, if there was an error the memory region and the memory map were not properly released.This can lead a system unusable if deferred probe is in use.
Replace mem_request and map with devm_ioremap_resource
Signed-off-by: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mtd/maps/physmap_of.c | 27 +++++---------------------- 1 file changed, 5 insertions(+), 22 deletions(-)
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index e46b4e9836668..77e7542fa8e42 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -28,7 +28,6 @@ struct of_flash_list { struct mtd_info *mtd; struct map_info map; - struct resource *res; };
struct of_flash { @@ -53,18 +52,10 @@ static int of_flash_remove(struct platform_device *dev) mtd_concat_destroy(info->cmtd); }
- for (i = 0; i < info->list_size; i++) { + for (i = 0; i < info->list_size; i++) if (info->list[i].mtd) map_destroy(info->list[i].mtd);
- if (info->list[i].map.virt) - iounmap(info->list[i].map.virt); - - if (info->list[i].res) { - release_resource(info->list[i].res); - kfree(info->list[i].res); - } - } return 0; }
@@ -223,10 +214,11 @@ static int of_flash_probe(struct platform_device *dev)
err = -EBUSY; res_size = resource_size(&res); - info->list[i].res = request_mem_region(res.start, res_size, - dev_name(&dev->dev)); - if (!info->list[i].res) + info->list[i].map.virt = devm_ioremap_resource(&dev->dev, &res); + if (IS_ERR(info->list[i].map.virt)) { + err = PTR_ERR(info->list[i].map.virt); goto err_out; + }
err = -ENXIO; width = of_get_property(dp, "bank-width", NULL); @@ -242,15 +234,6 @@ static int of_flash_probe(struct platform_device *dev) info->list[i].map.bankwidth = be32_to_cpup(width); info->list[i].map.device_node = dp;
- err = -ENOMEM; - info->list[i].map.virt = ioremap(info->list[i].map.phys, - info->list[i].map.size); - if (!info->list[i].map.virt) { - dev_err(&dev->dev, "Failed to ioremap() flash" - " region\n"); - goto err_out; - } - simple_map_init(&info->list[i].map);
/*