serial: pl011: Do not clear RX FIFO & RX interrupt in unthrottle.

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[ Upstream commit 032d5a71ed ]

Clearing the RX FIFO will cause data loss.
Copy the pl011_enabl_interrupts implementation, and remove the clear
interrupt and FIFO part of the code.

Fixes: 211565b100 ("serial: pl011: UPSTAT_AUTORTS requires .throttle/unthrottle")
Signed-off-by: delisun <delisun@pateo.com.cn>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20221110020108.7700-1-delisun@pateo.com.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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delisun 2022-11-10 10:01:08 +08:00 • committed by Greg Kroah-Hartman

parent 64bc5dbc32

commit 898a162d5f

1 changed files with 10 additions and 1 deletions

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drivers/tty/serial/amba-pl011.c

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