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authorLinus Walleij <linus.walleij@linaro.org>2023-01-25 03:23:08 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2023-02-03 07:54:55 +0300
commit727f083ff48ae94cd7422e42bb9513ab61160e8a (patch)
tree172614935b4fb0c9a945c3b3c3708baa806442ce /drivers/crypto
parent2d27267b379f589836949481aec9c9f39dbe1f26 (diff)
downloadlinux-727f083ff48ae94cd7422e42bb9513ab61160e8a.tar.xz
crypto: stm32/hash - Use existing busy poll function
When exporting state we are waiting indefinitely in the same was as the ordinary stm32_hash_wait_busy() poll-for-completion function but without a timeout, which means we could hang in an eternal loop. Fix this by waiting for completion like the rest of the code. Acked-by: Lionel Debieve <lionel.debieve@foss.st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/stm32/stm32-hash.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 0473ced7b4ea..cc0a4e413a82 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -960,11 +960,13 @@ static int stm32_hash_export(struct ahash_request *req, void *out)
struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
u32 *preg;
unsigned int i;
+ int ret;
pm_runtime_get_sync(hdev->dev);
- while ((stm32_hash_read(hdev, HASH_SR) & HASH_SR_BUSY))
- cpu_relax();
+ ret = stm32_hash_wait_busy(hdev);
+ if (ret)
+ return ret;
rctx->hw_context = kmalloc_array(3 + HASH_CSR_REGISTER_NUMBER,
sizeof(u32),