linux-kernel - [PATCH] nvmem: layouts: Switch from crc32() to crc32

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Message-ID: <20250620205027.23403-1-ebiggers@kernel.org>
Date: Fri, 20 Jun 2025 13:50:27 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-crypto@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>,
	Rafał Miłecki <rafal@...ecki.pl>,
	Srinivas Kandagatla <srini@...nel.org>,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH] nvmem: layouts: Switch from crc32() to crc32_le()

u_boot_env_parse() calls crc32() from within a scope that has a uint32_t
variable named crc32.  This works only because crc32() is actually a
macro that expands to crc32_le().  I'm planning to make it an inline
function instead, which will make the usual C scoping rules apply to it.
Therefore, update u_boot_env_parse() to be compatible with that.  To do
so, just call crc32_le() directly instead of using the crc32() alias.
(An alternative would be to rename the local variable.)

Signed-off-by: Eric Biggers <ebiggers@...nel.org>
---

I'm planning to apply this patch to crc-next, since my patch
https://lore.kernel.org/r/20250619183414.100082-3-ebiggers@kernel.org/
depends on this.

 drivers/nvmem/layouts/u-boot-env.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/layouts/u-boot-env.c b/drivers/nvmem/layouts/u-boot-env.c
index 436426d4e8f91..274e8a456e8c1 100644
--- a/drivers/nvmem/layouts/u-boot-env.c
+++ b/drivers/nvmem/layouts/u-boot-env.c
@@ -146,11 +146,11 @@ int u_boot_env_parse(struct device *dev, struct nvmem_device *nvmem,
 	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;

-	calc = crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L;
+	calc = crc32_le(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L;
 	if (calc != crc32) {
 		dev_err(dev, "Invalid calculated CRC32: 0x%08x (expected: 0x%08x)\n", calc, crc32);
 		err = -EINVAL;
 		goto err_kfree;
 	}

base-commit: e04c78d86a9699d136910cfc0bdcf01087e3267e
-- 
2.50.0