[PATCH v2 5.10.y-cip 10/12] watchdog: rzg2l_wdt: Add error check for reset_control_deassert

Biju Das

commit baf1aace9ad15401f08e048a7f1fdec79821bc61 upstream.

If reset_control_deassert() fails, then we won't be able to
access the device registers. Therefore check the return code of
reset_control_deassert() and bailout in case of error.

Signed-off-by: Biju Das <biju.das.jz@...>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...>
Reviewed-by: Guenter Roeck <linux@...>
Link: https://lore.kernel.org/r/20220225175320.11041-6-biju.das.jz@bp.renesas.com
Signed-off-by: Guenter Roeck <linux@...>
Signed-off-by: Wim Van Sebroeck <wim@...>
Signed-off-by: Biju Das <biju.das.jz@...>
drivers/watchdog/rzg2l_wdt.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c
index 88274704b260..73b667ed3e99 100644
--- a/drivers/watchdog/rzg2l_wdt.c
+++ b/drivers/watchdog/rzg2l_wdt.c
@@ -203,7 +203,10 @@ static int rzg2l_wdt_probe(struct platform_device *pdev)
return dev_err_probe(&pdev->dev, PTR_ERR(priv->rstc),
"failed to get cpg reset");

- reset_control_deassert(priv->rstc);
+ ret = reset_control_deassert(priv->rstc);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to deassert");

priv->wdev.info = &rzg2l_wdt_ident;

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