[PATCH 4.14 08/55] clk: tegra: fix error return case for recalc_rate

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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Timo Alho <talho@xxxxxxxxxx>

[ Upstream commit a47b44fbb13f5e7a981b4515dcddc93a321ae89c ]

tegra-bpmp clocks driver makes implicit conversion of signed error
code to unsigned value in recalc_rate operation. The behavior for
recalc_rate, according to it's specification, should be that "If the
driver cannot figure out a rate for this clock, it must return 0."

Fixes: ca6f2796eef7 ("clk: tegra: Add BPMP clock driver")
Signed-off-by: Timo Alho <talho@xxxxxxxxxx>
Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230912112951.2330497-1-cyndis@xxxxxxxx
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/clk/tegra/clk-bpmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c
index 6c933b0e29a3b..fcb7c599583b3 100644
--- a/drivers/clk/tegra/clk-bpmp.c
+++ b/drivers/clk/tegra/clk-bpmp.c
@@ -154,7 +154,7 @@ static unsigned long tegra_bpmp_clk_recalc_rate(struct clk_hw *hw,
 
 	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
 	if (err < 0)
-		return err;
+		return 0;
 
 	return response.rate;
 }
-- 
2.40.1






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