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| author | Valentin Caron <valentin.caron@foss.st.com> | 2022-04-19 10:53:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-22 16:36:23 +0200 |
| commit | 28fb1a92a00706d4e008ab24fbd8e4642df46ca5 (patch) | |
| tree | 323c8bd551a8aa70adf5a7ecfb0a6d5a4faae4d5 /drivers/tty/serial/stm32-usart.h | |
| parent | ec66b8cf03e5a63de6332c989b0ceebe4ba2937e (diff) | |
| download | linux-28fb1a92a00706d4e008ab24fbd8e4642df46ca5.tar.gz linux-28fb1a92a00706d4e008ab24fbd8e4642df46ca5.tar.bz2 linux-28fb1a92a00706d4e008ab24fbd8e4642df46ca5.zip | |
serial: stm32: remove infinite loop possibility in putchar function
Rework stm32_usart_console_putchar() function in order to anticipate
the case where the character can never be sent.
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20220419085330.1178925-2-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.h')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index feab952aec16..d734c4a5fd24 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -251,6 +251,8 @@ struct stm32_usart_info stm32h7_info = { #define RX_BUF_P (RX_BUF_L / 2) /* dma rx buffer period */ #define TX_BUF_L RX_BUF_L /* dma tx buffer length */ +#define STM32_USART_TIMEOUT_USEC USEC_PER_SEC /* 1s timeout in µs */ + struct stm32_port { struct uart_port port; struct clk *clk; |