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Date: Sat, 25 Jun 2022 10:36:43 +0200
From: Stefan Wahren <stefan.wahren@...e.com>
To: Florian Fainelli <f.fainelli@...il.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>
Cc: bcm-kernel-feedback-list@...adcom.com,
Maxime Ripard <maxime@...no.tech>, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Stefan Wahren <stefan.wahren@...e.com>
Subject: [PATCH] clk: bcm: rpi: Fix error handling of raspberrypi_fw_get_rate
The function raspberrypi_fw_get_rate (e.g. used for the recalc_rate
hook) can fail to get the clock rate from the firmware. In this case
we cannot return a signed error value, which would be casted to
unsigned long. Fix this by returning 0 instead.
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
---
drivers/clk/bcm/clk-raspberrypi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index 73518009a0f2..39d63c983d62 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -203,7 +203,7 @@ static unsigned long raspberrypi_fw_get_rate(struct clk_hw *hw,
ret = raspberrypi_clock_property(rpi->firmware, data,
RPI_FIRMWARE_GET_CLOCK_RATE, &val);
if (ret)
- return ret;
+ return 0;
return val;
}
--
2.25.1
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