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| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2025-01-16 20:22:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 11:36:31 +0100 |
| commit | c071c5d814ae1039f1f3b266e1e574b5e3eda89b (patch) | |
| tree | b9d74f0dca8c43e15d3a520ca72df7d33f602770 /arch/mips | |
| parent | eac9a43307f248c8d8424f74b98760b8d3df8991 (diff) | |
| download | linux-c071c5d814ae1039f1f3b266e1e574b5e3eda89b.tar.gz linux-c071c5d814ae1039f1f3b266e1e574b5e3eda89b.tar.bz2 linux-c071c5d814ae1039f1f3b266e1e574b5e3eda89b.zip | |
serial: sh-sci: Do not probe the serial port if its slot in sci_ports[] is in use
commit 9f7dea875cc7f9c1a56a5c688290634a59cd1420 upstream.
In the sh-sci driver, sci_ports[0] is used by earlycon. If the earlycon is
still active when sci_probe() is called and the new serial port is supposed
to map to sci_ports[0], return -EBUSY to prevent breaking the earlycon.
This situation should occurs in debug scenarios, and users should be
aware of the potential conflict.
Fixes: 0b0cced19ab1 ("serial: sh-sci: Add CONFIG_SERIAL_EARLYCON support")
Cc: stable@vger.kernel.org
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/r/20250116182249.3828577-4-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips')
0 files changed, 0 insertions, 0 deletions