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crypto: stm32/hash - Use existing busy poll function

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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>
This commit is contained in:
Linus Walleij 2023-01-25 01:23:08 +01:00 committed by Herbert Xu
parent 2d27267b37
commit 727f083ff4
1 changed files with 4 additions and 2 deletions
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6
drivers/crypto/stm32/stm32-hash.c
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@ -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),