[RFC v1 PATCH 1/3] drivers: soc: add support for soc_device_match returning -EPROBE_DEFER
From: Alice Guo (OSS) <hidden>
Date: 2021-04-19 04:28:18
Also in:
dmaengine, dri-devel, linux-amlogic, linux-clk, linux-crypto, linux-gpio, linux-iommu, linux-media, linux-mediatek, linux-mmc, linux-omap, linux-phy, linux-pm, linux-renesas-soc, linux-staging, linux-usb, linux-watchdog, lkml, netdev
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
From: Alice Guo <redacted> In i.MX8M boards, the registration of SoC device is later than caam driver which needs it. Caam driver needs soc_device_match to provide -EPROBE_DEFER when no SoC device is registered and no early_soc_dev_attr. Signed-off-by: Alice Guo <redacted> --- drivers/base/soc.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 0af5363a582c..12a22f9cf5c8 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c@@ -110,6 +110,7 @@ static void soc_release(struct device *dev) } static struct soc_device_attribute *early_soc_dev_attr; +static bool soc_dev_attr_init_done = false; struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr) {
@@ -157,6 +158,7 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr return ERR_PTR(ret); } + soc_dev_attr_init_done = true; return soc_dev; out3:
@@ -246,6 +248,9 @@ const struct soc_device_attribute *soc_device_match( if (!matches) return NULL; + if (!soc_dev_attr_init_done && !early_soc_dev_attr) + return ERR_PTR(-EPROBE_DEFER); + while (!ret) { if (!(matches->machine || matches->family || matches->revision || matches->soc_id))
--
2.17.1