drm/scdc-helper: Don't use ssize_t return type for scdc_read/write

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drm_scdc_read and drm_scdc_write, both of which are only used within
drm_scdc_helper (although exported), use a ssize_t as their return type.

This would make sense if they returned the number of bytes read/written
on success, and negative errno otherwise. However, they return 0 on
success.

Demote them to "int" as their return type, in order to avoid needlessly
using 64 bits when less suffices.

No functional change.

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Tested-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Link: https://patch.msgid.link/20260724-scdc-link-health-v9-1-bdda406d016d@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>

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Nicolas Frattaroli 2026-07-24 16:22:36 +02:00 • committed by Daniel Stone

parent 0d46312808

commit ed4a19460f

2 changed files with 8 additions and 8 deletions

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8

drivers/gpu/drm/display/drm_scdc_helper.c

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8

include/drm/display/drm_scdc_helper.h

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