Messages in this thread | | | Date | Mon, 29 Aug 2022 08:25:58 +0200 | Subject | Re: [PATCH] nvmem: u-boot-env: fix crc32 casting type | From | Ahmad Fatoum <> |
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Hello Rafał,
On 18.08.22 06:38, Rafał Miłecki wrote: > From: Rafał Miłecki <rafal@milecki.pl> > > This fixes: > drivers/nvmem/u-boot-env.c:141:17: sparse: sparse: cast to restricted __le32 > > Reported-by: kernel test robot <lkp@intel.com> > Fixes: f955dc1445069 ("nvmem: add driver handling U-Boot environment variables") > Signed-off-by: Rafał Miłecki <rafal@milecki.pl> > --- > drivers/nvmem/u-boot-env.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c > index 9b9abfb8f187..fb993ef4249f 100644 > --- a/drivers/nvmem/u-boot-env.c > +++ b/drivers/nvmem/u-boot-env.c > @@ -138,7 +138,7 @@ static int u_boot_env_parse(struct u_boot_env *priv) > data_offset = offsetof(struct u_boot_env_image_redundant, data); > break; > } > - crc32 = le32_to_cpu(*(uint32_t *)(buf + crc32_offset)); > + crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset));
I had to do a double take to make sure alignment is not violated. It's not, because crc32_offset is always zero.
How about rewriting this as
/* CRC32 is always at offset 0 */ crc32 = le32_to_cpup(buf);
To make the alignment clear to the reader?
> crc32_data_len = priv->mtd->size - crc32_data_offset; > data_len = priv->mtd->size - data_offset; >
Cheers, Ahmad
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