This is a note to let you know that I've just added the patch titled
nvmem: u-boot-env: use nvmem_add_one_cell() nvmem subsystem helper
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nvmem-u-boot-env-use-nvmem_add_one_cell-nvmem-subsys.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3c2cfa11848f7a35176687354df245d0a04b7dc1
Author: Rafał Miłecki <rafal@xxxxxxxxxx>
Date: Thu Dec 21 18:34:18 2023 +0100
nvmem: u-boot-env: use nvmem_add_one_cell() nvmem subsystem helper
[ Upstream commit 7c8979b42b1a9c5604f431ba804928e55919263c ]
Simplify adding NVMEM cells.
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231221173421.13737-3-zajec5@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Stable-dep-of: 8679e8b4a1eb ("nvmem: u-boot-env: error if NVMEM device is too small")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c
index c4ae94af4af7..dd9d0ad22712 100644
--- a/drivers/nvmem/u-boot-env.c
+++ b/drivers/nvmem/u-boot-env.c
@@ -23,13 +23,10 @@ enum u_boot_env_format {
struct u_boot_env {
struct device *dev;
+ struct nvmem_device *nvmem;
enum u_boot_env_format format;
struct mtd_info *mtd;
-
- /* Cells */
- struct nvmem_cell_info *cells;
- int ncells;
};
struct u_boot_env_image_single {
@@ -94,43 +91,36 @@ static int u_boot_env_read_post_process_ethaddr(void *context, const char *id, i
static int u_boot_env_add_cells(struct u_boot_env *priv, uint8_t *buf,
size_t data_offset, size_t data_len)
{
+ struct nvmem_device *nvmem = priv->nvmem;
struct device *dev = priv->dev;
char *data = buf + data_offset;
char *var, *value, *eq;
- int idx;
-
- priv->ncells = 0;
- for (var = data; var < data + data_len && *var; var += strlen(var) + 1)
- priv->ncells++;
-
- priv->cells = devm_kcalloc(dev, priv->ncells, sizeof(*priv->cells), GFP_KERNEL);
- if (!priv->cells)
- return -ENOMEM;
- for (var = data, idx = 0;
+ for (var = data;
var < data + data_len && *var;
- var = value + strlen(value) + 1, idx++) {
+ var = value + strlen(value) + 1) {
+ struct nvmem_cell_info info = {};
+
eq = strchr(var, '=');
if (!eq)
break;
*eq = '\0';
value = eq + 1;
- priv->cells[idx].name = devm_kstrdup(dev, var, GFP_KERNEL);
- if (!priv->cells[idx].name)
+ info.name = devm_kstrdup(dev, var, GFP_KERNEL);
+ if (!info.name)
return -ENOMEM;
- priv->cells[idx].offset = data_offset + value - data;
- priv->cells[idx].bytes = strlen(value);
- priv->cells[idx].np = of_get_child_by_name(dev->of_node, priv->cells[idx].name);
+ info.offset = data_offset + value - data;
+ info.bytes = strlen(value);
+ info.np = of_get_child_by_name(dev->of_node, info.name);
if (!strcmp(var, "ethaddr")) {
- priv->cells[idx].raw_len = strlen(value);
- priv->cells[idx].bytes = ETH_ALEN;
- priv->cells[idx].read_post_process = u_boot_env_read_post_process_ethaddr;
+ info.raw_len = strlen(value);
+ info.bytes = ETH_ALEN;
+ info.read_post_process = u_boot_env_read_post_process_ethaddr;
}
- }
- if (WARN_ON(idx != priv->ncells))
- priv->ncells = idx;
+ nvmem_add_one_cell(nvmem, &info);
+ }
return 0;
}
@@ -209,7 +199,6 @@ static int u_boot_env_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct u_boot_env *priv;
- int err;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -224,17 +213,15 @@ static int u_boot_env_probe(struct platform_device *pdev)
return PTR_ERR(priv->mtd);
}
- err = u_boot_env_parse(priv);
- if (err)
- return err;
-
config.dev = dev;
- config.cells = priv->cells;
- config.ncells = priv->ncells;
config.priv = priv;
config.size = priv->mtd->size;
- return PTR_ERR_OR_ZERO(devm_nvmem_register(dev, &config));
+ priv->nvmem = devm_nvmem_register(dev, &config);
+ if (IS_ERR(priv->nvmem))
+ return PTR_ERR(priv->nvmem);
+
+ return u_boot_env_parse(priv);
}
static const struct of_device_id u_boot_env_of_match_table[] = {
