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crypto: stm32/hash - defer probe for reset controller

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Change stm32 HASH driver to defer its probe operation when
reset controller device is registered but has not been probed yet.

Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Reviewed-by: Lionel DEBIEVE <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Etienne Carriere 2020-04-27 08:42:24 +02:00 committed by Herbert Xu
parent 12b3cf9093
commit 43b05ce767
1 changed files with 7 additions and 2 deletions
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9
drivers/crypto/stm32/stm32-hash.c
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@ -1482,7 +1482,12 @@ static int stm32_hash_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
hdev->rst = devm_reset_control_get(&pdev->dev, NULL);
if (!IS_ERR(hdev->rst)) {
if (IS_ERR(hdev->rst)) {
if (PTR_ERR(hdev->rst) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto err_reset;
}
} else {
reset_control_assert(hdev->rst);
udelay(2);
reset_control_deassert(hdev->rst);
@ -1535,7 +1540,7 @@ err_engine:
if (hdev->dma_lch)
dma_release_channel(hdev->dma_lch);
err_reset:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);