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| author | Thomas Bourgoin <thomas.bourgoin@foss.st.com> | 2023-12-15 12:17:24 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-12-22 12:30:19 +0800 |
| commit | 0eaef675b94c746900dcea7f6c41b9a103ed5d53 (patch) | |
| tree | a834176c87c393ea77196ffea78b3a603d1a0cb8 /drivers/crypto | |
| parent | fcf60f4bcf54952cc14d14178c358be222dbeb43 (diff) | |
| download | linux-0eaef675b94c746900dcea7f6c41b9a103ed5d53.tar.gz | |
crypto: stm32/crc32 - fix parsing list of devices
smatch warnings:
drivers/crypto/stm32/stm32-crc32.c:108 stm32_crc_get_next_crc() warn:
can 'crc' even be NULL?
Use list_first_entry_or_null instead of list_first_entry to retrieve
the first device registered.
The function list_first_entry always return a non NULL pointer even if
the list is empty. Hence checking if the pointer returned is NULL does
not tell if the list is empty or not.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202311281111.ou2oUL2i-lkp@intel.com/
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/r/202311281111.ou2oUL2i-lkp@intel.com/
Signed-off-by: Thomas Bourgoin <thomas.bourgoin@foss.st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/stm32/stm32-crc32.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/stm32/stm32-crc32.c b/drivers/crypto/stm32/stm32-crc32.c index b2d5c8921ab36c..b0cf6d2fd352ff 100644 --- a/drivers/crypto/stm32/stm32-crc32.c +++ b/drivers/crypto/stm32/stm32-crc32.c @@ -104,7 +104,7 @@ static struct stm32_crc *stm32_crc_get_next_crc(void) struct stm32_crc *crc; spin_lock_bh(&crc_list.lock); - crc = list_first_entry(&crc_list.dev_list, struct stm32_crc, list); + crc = list_first_entry_or_null(&crc_list.dev_list, struct stm32_crc, list); if (crc) list_move_tail(&crc->list, &crc_list.dev_list); spin_unlock_bh(&crc_list.lock); |