From: Nícolas F. R. A. Prado nfraprado@collabora.com
stable inclusion from stable-v6.6.33 commit 30cb32c7ec5ea7a0696d4b2edfb4a69fae56263b category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD6H2
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 6d9e877cde7e9b516a9a99751b8222c87557436d ]
Given that failing to find a DSI host causes the driver to defer probe, make use of dev_err_probe() to log the reason. This makes the defer probe reason available and avoids alerting userspace about something that is not necessarily an error.
Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge") Suggested-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Signed-off-by: Nícolas F. R. A. Prado nfraprado@collabora.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Robert Foss rfoss@kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c index 6f33bb0dd32a..c41ffd0bc049 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c @@ -265,10 +265,8 @@ static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc, int ret;
host = of_find_mipi_dsi_host_by_node(dsi_node); - if (!host) { - dev_err(dev, "failed to find dsi host\n"); - return ERR_PTR(-EPROBE_DEFER); - } + if (!host) + return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n"));
dsi = devm_mipi_dsi_device_register_full(dev, host, &info); if (IS_ERR(dsi)) {