Francesco Dolcini d849cf64c5 platform/surface: aggregator: fix recv_buf() return value ...

commit c8820c92ca upstream.

Serdev recv_buf() callback is supposed to return the amount of bytes
consumed, therefore an int in between 0 and count.

Do not return negative number in case of issue, when
ssam_controller_receive_buf() returns ESHUTDOWN just returns 0, e.g. no
bytes consumed, this keep the exact same behavior as it was before.

This fixes a potential WARN in serdev-ttyport.c:ttyport_receive_buf().

Fixes: c167b9c7e3 ("platform/surface: Add Surface Aggregator subsystem")
Cc: stable@vger.kernel.org
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20231128194935.11350-1-francesco@dolcini.it
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-12-13 18:36:44 +01:00

..

aggregator

platform/surface: aggregator: fix recv_buf() return value

2023-12-13 18:36:44 +01:00

Kconfig

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Makefile

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surface3_button.c

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surface3_power.c

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surface3-wmi.c

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surface_acpi_notify.c

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surface_aggregator_cdev.c

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surface_aggregator_registry.c

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surface_dtx.c

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surface_gpe.c

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surface_hotplug.c

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surface_platform_profile.c

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surfacepro3_button.c

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