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Subject[PATCH AUTOSEL 4.14 057/115] mtd: physmap_of: Release resources on error
Date
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_core.c | 27 +++++----------------------
1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/mtd/maps/physmap_of_core.c b/drivers/mtd/maps/physmap_of_core.c
index b1bd4faecfb25..5d8399742c754 100644
--- a/drivers/mtd/maps/physmap_of_core.c
+++ b/drivers/mtd/maps/physmap_of_core.c
@@ -30,7 +30,6 @@
struct of_flash_list {
struct mtd_info *mtd;
struct map_info map;
- struct resource *res;
};

struct of_flash {
@@ -55,18 +54,10 @@ 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;
}

@@ -214,10 +205,11 @@ 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);
@@ -240,15 +232,6 @@ static int of_flash_probe(struct platform_device *dev)
if (err)
goto err_out;

- 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);

/*
--
2.20.1
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