Function pm_runtime_get_sync could fail and we need to check return
value to prevent kernel crash.
Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx>
---
drivers/crypto/omap-sham.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index b20e374..5573a1c 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -1949,7 +1949,13 @@ static int omap_sham_probe(struct platform_device *pdev)
dd->flags |= dd->pdata->flags;
pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
+
+ err = pm_runtime_get_sync(dev);
+ if (err < 0) {
+ dev_err(dev, "failed to get sync: %d\n", err);
+ goto err_pm;
+ }
+
rev = omap_sham_read(dd, SHA_REG_REV(dd));
pm_runtime_put_sync(&pdev->dev);
@@ -1979,6 +1985,7 @@ err_algs:
for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
crypto_unregister_ahash(
&dd->pdata->algs_info[i].algs_list[j]);
+err_pm:
pm_runtime_disable(dev);
if (dd->dma_lch)
dma_release_channel(dd->dma_lch);
--
1.7.9.5
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