Commit 3136e903 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by David Woodhouse

[MTD] physmap: fix memory leak on physmap_flash_remove by using devres

physmap_flash_remove releases only last memory region.  This causes
memory leak if multiple resources were provided.

This patch fixes this leakage by using devm_ functions.
Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 7854643a
......@@ -19,7 +19,7 @@
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/concat.h>
#include <asm/io.h>
#include <linux/io.h>
#define MAX_RESOURCES 4
......@@ -27,7 +27,6 @@ struct physmap_flash_info {
struct mtd_info *mtd[MAX_RESOURCES];
struct mtd_info *cmtd;
struct map_info map[MAX_RESOURCES];
struct resource *res;
#ifdef CONFIG_MTD_PARTITIONS
int nr_parts;
struct mtd_partition *parts;
......@@ -70,16 +69,7 @@ static int physmap_flash_remove(struct platform_device *dev)
#endif
map_destroy(info->mtd[i]);
}
if (info->map[i].virt != NULL)
iounmap(info->map[i].virt);
}
if (info->res != NULL) {
release_resource(info->res);
kfree(info->res);
}
return 0;
}
......@@ -101,7 +91,8 @@ static int physmap_flash_probe(struct platform_device *dev)
if (physmap_data == NULL)
return -ENODEV;
info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
GFP_KERNEL);
if (info == NULL) {
err = -ENOMEM;
goto err_out;
......@@ -114,10 +105,10 @@ static int physmap_flash_probe(struct platform_device *dev)
(unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
(unsigned long long)dev->resource[i].start);
info->res = request_mem_region(dev->resource[i].start,
dev->resource[i].end - dev->resource[i].start + 1,
dev->dev.bus_id);
if (info->res == NULL) {
if (!devm_request_mem_region(&dev->dev,
dev->resource[i].start,
dev->resource[i].end - dev->resource[i].start + 1,
dev->dev.bus_id)) {
dev_err(&dev->dev, "Could not reserve memory region\n");
err = -ENOMEM;
goto err_out;
......@@ -129,7 +120,8 @@ static int physmap_flash_probe(struct platform_device *dev)
info->map[i].bankwidth = physmap_data->width;
info->map[i].set_vpp = physmap_data->set_vpp;
info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size);
info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
info->map[i].size);
if (info->map[i].virt == NULL) {
dev_err(&dev->dev, "Failed to ioremap flash region\n");
err = EIO;
......
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