| Message ID | 20220625083643.4012-1-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | clk: bcm: rpi: Fix error handling of raspberrypi_fw_get_rate | expand |
On 6/25/22 01:36, Stefan Wahren wrote: > 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@i2se.com> Fixes: 4e85e535e6cc ("clk: bcm283x: add driver interfacing with Raspberry Pi's firmware") Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Am 27.06.22 um 18:24 schrieb Florian Fainelli: > On 6/25/22 01:36, Stefan Wahren wrote: >> 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@i2se.com> > > Fixes: 4e85e535e6cc ("clk: bcm283x: add driver interfacing with > Raspberry Pi's firmware") > > Acked-by: Florian Fainelli <f.fainelli@gmail.com> gentle ping
Quoting Stefan Wahren (2022-06-25 01:36:43) > 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@i2se.com> > --- Applied to clk-fixes
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; }
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@i2se.com> --- drivers/clk/bcm/clk-raspberrypi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)