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[v2,3/6] crypto: stm32/hash: Use existing busy poll function

Message ID 20221227-ux500-stm32-hash-v2-3-bc443bc44ca4@linaro.org
State Superseded
Headers show
Series crypto: stm32 hash - reuse for Ux500 | expand

Commit Message

Linus Walleij Jan. 10, 2023, 7:19 p.m. UTC 
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>
---
ChangeLog v1->v2:
- Pick up Lionel's ACK
---
 drivers/crypto/stm32/stm32-hash.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

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),