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| author |   Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> | 2022-06-08 00:22:44 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-10 13:30:41 +0200 |
| commit | cfab87c2c2715763dc7e43d9968bdaa01cde4bc3 (patch) | |
| tree | ba9de1fdf2ace007227aad12aeec2c9003a94f8a /include | |
| parent | tty: n_gsm: Debug output allocation must use GFP_ATOMIC (diff) | |
| download | linux-dev-cfab87c2c2715763dc7e43d9968bdaa01cde4bc3.tar.xz linux-dev-cfab87c2c2715763dc7e43d9968bdaa01cde4bc3.zip | |
serial: core: Introduce callback for start_rx and do stop_rx in suspend only if this callback implementation is present.
In suspend sequence there is a need to perform stop_rx during suspend
sequence to prevent any asynchronous data over rx line. However this
can cause problem to drivers which dont do re-start_rx during set_termios.
Add new callback start_rx and perform stop_rx only when implementation of
start_rx is present. Also add call to start_rx in resume sequence so that
drivers who come across this problem can make use of this framework.
Fixes: c9d2325cdb92 ("serial: core: Do stop_rx in suspend path for console if console_suspend is disabled")
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Link: https://lore.kernel.org/r/1654627965-1461-2-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/serial_core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index cbd5070bc87f..657a0fc68a3f 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -45,6 +45,7 @@ struct uart_ops { void (*unthrottle)(struct uart_port *); void (*send_xchar)(struct uart_port *, char ch); void (*stop_rx)(struct uart_port *); + void (*start_rx)(struct uart_port *); void (*enable_ms)(struct uart_port *); void (*break_ctl)(struct uart_port *, int ctl); int (*startup)(struct uart_port *); |