From: Rafał Miłecki rafal@milecki.pl
1. Prefer kzalloc() over kcalloc() See memory-allocation.rst which says: "to be on the safe side it's best to use routines that set memory to zero, like kzalloc()" 2. Drop dev_err() for u_boot_env_add_cells() fail It can fail only on -ENOMEM. We don't want to print error then. 3. Add extra "crc32_addr" variable It makes code reading header's crc32 easier to understand / review.
Signed-off-by: Rafał Miłecki rafal@milecki.pl Reviewed-by: Miquel Raynal miquel.raynal@bootlin.com --- V2: New patch with suggestions from Miquel
drivers/nvmem/u-boot-env.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c index 111905189341..befbab156cda 100644 --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c @@ -132,6 +132,7 @@ static int u_boot_env_parse(struct u_boot_env *priv) size_t crc32_data_offset; size_t crc32_data_len; size_t crc32_offset; + __le32 *crc32_addr; size_t data_offset; size_t data_len; size_t dev_size; @@ -143,7 +144,7 @@ static int u_boot_env_parse(struct u_boot_env *priv)
dev_size = nvmem_dev_size(nvmem);
- buf = kcalloc(1, dev_size, GFP_KERNEL); + buf = kzalloc(dev_size, GFP_KERNEL); if (!buf) { err = -ENOMEM; goto err_out; @@ -175,7 +176,8 @@ static int u_boot_env_parse(struct u_boot_env *priv) data_offset = offsetof(struct u_boot_env_image_broadcom, data); break; } - crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset)); + crc32_addr = (__le32 *)(buf + crc32_offset); + crc32 = le32_to_cpu(*crc32_addr); crc32_data_len = dev_size - crc32_data_offset; data_len = dev_size - data_offset;
@@ -188,8 +190,6 @@ static int u_boot_env_parse(struct u_boot_env *priv)
buf[dev_size - 1] = '\0'; err = u_boot_env_add_cells(priv, buf, data_offset, data_len); - if (err) - dev_err(dev, "Failed to add cells: %d\n", err);
err_kfree: kfree(buf);