diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/814-v6.4-0003-nvmem-core-handle-the-absence-of-expected-layouts.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/814-v6.4-0003-nvmem-core-handle-the-absence-of-expected-layouts.patch | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/target/linux/generic/backport-5.10/814-v6.4-0003-nvmem-core-handle-the-absence-of-expected-layouts.patch b/target/linux/generic/backport-5.10/814-v6.4-0003-nvmem-core-handle-the-absence-of-expected-layouts.patch deleted file mode 100644 index 6fa7b6382d..0000000000 --- a/target/linux/generic/backport-5.10/814-v6.4-0003-nvmem-core-handle-the-absence-of-expected-layouts.patch +++ /dev/null @@ -1,61 +0,0 @@ -From 6468a6f45148fb5e95c86b4efebf63f9abcd2137 Mon Sep 17 00:00:00 2001 -From: Miquel Raynal <miquel.raynal@bootlin.com> -Date: Tue, 4 Apr 2023 18:21:22 +0100 -Subject: [PATCH] nvmem: core: handle the absence of expected layouts - -Make nvmem_layout_get() return -EPROBE_DEFER while the expected layout -is not available. This condition cannot be triggered today as nvmem -layout drivers are initialed as part of an early init call, but soon -these drivers will be converted into modules and be initialized with a -standard priority, so the unavailability of the drivers might become a -reality that must be taken care of. - -Let's anticipate this by telling the caller the layout might not yet be -available. A probe deferral is requested in this case. - -Please note this does not affect any nvmem device not using layouts, -because an early check against the "nvmem-layout" container presence -will return NULL in this case. - -Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> -Tested-by: Michael Walle <michael@walle.cc> -Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> -Link: https://lore.kernel.org/r/20230404172148.82422-15-srinivas.kandagatla@linaro.org -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/nvmem/core.c | 10 +++++++++- - 1 file changed, 9 insertions(+), 1 deletion(-) - ---- a/drivers/nvmem/core.c -+++ b/drivers/nvmem/core.c -@@ -755,7 +755,7 @@ EXPORT_SYMBOL_GPL(nvmem_layout_unregiste - static struct nvmem_layout *nvmem_layout_get(struct nvmem_device *nvmem) - { - struct device_node *layout_np, *np = nvmem->dev.of_node; -- struct nvmem_layout *l, *layout = NULL; -+ struct nvmem_layout *l, *layout = ERR_PTR(-EPROBE_DEFER); - - layout_np = of_get_child_by_name(np, "nvmem-layout"); - if (!layout_np) -@@ -938,6 +938,13 @@ struct nvmem_device *nvmem_register(cons - * pointer will be NULL and nvmem_layout_put() will be a noop. - */ - nvmem->layout = config->layout ?: nvmem_layout_get(nvmem); -+ if (IS_ERR(nvmem->layout)) { -+ rval = PTR_ERR(nvmem->layout); -+ nvmem->layout = NULL; -+ -+ if (rval == -EPROBE_DEFER) -+ goto err_teardown_compat; -+ } - - if (config->cells) { - rval = nvmem_add_cells(nvmem, config->cells, config->ncells); -@@ -970,6 +977,7 @@ struct nvmem_device *nvmem_register(cons - err_remove_cells: - nvmem_device_remove_all_cells(nvmem); - nvmem_layout_put(nvmem->layout); -+err_teardown_compat: - if (config->compat) - nvmem_sysfs_remove_compat(nvmem, config); - err_put_device: |