Messages in this thread | | | Subject | Re: [PATCH] serial: tegra: Add missing clk_disable_unprepare() in tegra_uart_hw_init() | From | "yiyang (D)" <> | Date | Sat, 26 Nov 2022 10:24:32 +0800 |
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On 2022/11/25 19:19, Christophe JAILLET wrote: > Le 25/11/2022 à 11:11, Yi Yang a écrit : >> Add the missing clk_disable_unprepare() before return from >> tegra_uart_hw_init() in the error handling path. >> >> Fixes: cc9ca4d95846 ("serial: tegra: Only print FIFO error message >> when an error occurs") >> Fixes: d781ec21bae6 ("serial: tegra: report clk rate errors") >> Signed-off-by: Yi Yang <yiyang13-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> >> --- >> drivers/tty/serial/serial-tegra.c | 2 ++ >> 1 file changed, 2 insertions(+) >> > > Hi, > > I think that it is also missing in tegra_uart_startup() if an error > occurs after a successful tegra_uart_hw_init() call. > > Or maybe (based on function mane) tegra_uart_hw_deinit() should called > there. > > Just my 2c. > > CJ >
Thanks! I will fix it in v2 patch.
> >> diff --git a/drivers/tty/serial/serial-tegra.c >> b/drivers/tty/serial/serial-tegra.c >> index e5b9773db5e3..abc5039eb273 100644 >> --- a/drivers/tty/serial/serial-tegra.c >> +++ b/drivers/tty/serial/serial-tegra.c >> @@ -1046,6 +1046,7 @@ static int tegra_uart_hw_init(struct >> tegra_uart_port *tup) >> if (tup->cdata->fifo_mode_enable_status) { >> ret = tegra_uart_wait_fifo_mode_enabled(tup); >> if (ret < 0) { >> + clk_disable_unprepare(tup->uart_clk); >> dev_err(tup->uport.dev, >> "Failed to enable FIFO mode: %d\n", ret); >> return ret; >> @@ -1067,6 +1068,7 @@ static int tegra_uart_hw_init(struct >> tegra_uart_port *tup) >> */ >> ret = tegra_set_baudrate(tup, TEGRA_UART_DEFAULT_BAUD); >> if (ret < 0) { >> + clk_disable_unprepare(tup->uart_clk); >> dev_err(tup->uport.dev, "Failed to set baud rate\n"); >> return ret; >> } > > .
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