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Subject[PATCH v4 1/9] crypto: stm32/cryp - defer probe for reset controller
Date
From: Etienne Carriere <etienne.carriere@foss.st.com>

Change stm32 CRYP 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@foss.st.com>
Signed-off-by: Nicolas Toromanoff <nicolas.toromanoff@foss.st.com>
---
drivers/crypto/stm32/stm32-cryp.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c
index 7389a0536ff0..dcdd313485de 100644
--- a/drivers/crypto/stm32/stm32-cryp.c
+++ b/drivers/crypto/stm32/stm32-cryp.c
@@ -1973,7 +1973,11 @@ static int stm32_cryp_probe(struct platform_device *pdev)
pm_runtime_enable(dev);

rst = devm_reset_control_get(dev, NULL);
- if (!IS_ERR(rst)) {
+ if (IS_ERR(rst)) {
+ ret = PTR_ERR(rst);
+ if (ret == -EPROBE_DEFER)
+ goto err_rst;
+ } else {
reset_control_assert(rst);
udelay(2);
reset_control_deassert(rst);
@@ -2024,7 +2028,7 @@ static int stm32_cryp_probe(struct platform_device *pdev)
spin_lock(&cryp_list.lock);
list_del(&cryp->list);
spin_unlock(&cryp_list.lock);
-
+err_rst:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
pm_runtime_disable(dev);
--
2.17.1
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