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| author | Johan Hovold <[email protected]> | 2023-02-27 08:50:46 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2023-03-09 16:08:05 +0000 |
| commit | 6e01f9a594ee0f69fb52cc8d11971612b4817f0b (patch) | |
| tree | 1cb46949b7c06282af9477dec03e5281abfd8f91 /fs/proc/array.c | |
| parent | serial: 8250_em: Fix UART port type (diff) | |
| download | kernel-6e01f9a594ee0f69fb52cc8d11971612b4817f0b.tar.gz kernel-6e01f9a594ee0f69fb52cc8d11971612b4817f0b.zip | |
serial: 8250_fsl: fix handle_irq locking
The 8250 handle_irq callback is not just called from the interrupt
handler but also from a timer callback when polling (e.g. for ports
without an interrupt line). Consequently the callback must explicitly
disable interrupts to avoid a potential deadlock with another interrupt
in polled mode.
Fix up the two paths in the freescale callback that failed to re-enable
interrupts when polling.
Fixes: 853a9ae29e97 ("serial: 8250: fix handle_irq locking")
Cc: [email protected] # 5.13
Reported-by: Dan Carpenter <[email protected]>
Link: https://lore.kernel.org/r/Y/xYzqp4ogmOF5t0@kili
Signed-off-by: Johan Hovold <[email protected]>
Acked-by: Jiri Slaby <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'fs/proc/array.c')
0 files changed, 0 insertions, 0 deletions