serial: 8250_dw: Take port lock while accessing LSR

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[ Upstream commit b9491b2e45 ]

Accessing LSR requires port lock because it mutates lsr_saved_flags
in serial_lsr_in().

Fixes: 197eb5c416 ("serial: 8250_dw: Use serial_lsr_in() in dw8250_handle_irq()")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/c5879db7-bee9-93f-526e-872a292442@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ilpo Järvinen 2022-06-28 12:01:28 +03:00 • committed by Greg Kroah-Hartman

parent 1fbdfbaa3c

commit 317a412812

1 changed files with 3 additions and 0 deletions

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drivers/tty/serial/8250/8250_dw.c

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