[PATCH 3/7] crypto: stm32/hash: Use existing busy poll function

From: Linus Walleij
Date: Tue Dec 27 2022 - 18:04:44 EST


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.

Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
drivers/crypto/stm32/stm32-hash.c | 6 ++++--
1 file 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),

--
2.38.1