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authorPeter Collingbourne <pcc@google.com>2024-02-22 11:26:34 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-03-02 22:11:03 +0100
commite5d6bd25f93d6ae158bb4cd04956cb497a85b8ef (patch)
tree8430541d7e01f075d70bd4d78f982d624d4f9a30 /net/mac80211/debugfs_netdev.c
parent672448ccf9b6a676f96f9352cbf91f4d35f4084a (diff)
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serial: 8250_dw: Do not reclock if already at correct rate
When userspace opens the console, we call set_termios() passing a termios with the console's configured baud rate. Currently this causes dw8250_set_termios() to disable and then re-enable the UART clock at the same frequency as it was originally. This can cause corruption of any concurrent console output. Fix it by skipping the reclocking if we are already at the correct rate. Signed-off-by: Peter Collingbourne <pcc@google.com> Fixes: 4e26b134bd17 ("serial: 8250_dw: clock rate handling for all ACPI platforms") Cc: stable@vger.kernel.org Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20240222192635.1050502-1-pcc@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mac80211/debugfs_netdev.c')
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