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FROMGIT: firmware_class: make firmware caching configurable

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Because firmware caching generates uevent messages that are sent over
a netlink socket, it can prevent suspend on many platforms.  It's
also not always useful, so make it a configurable option.

Signed-off-by: Mark Salyzyn <[email protected]>
Cc: Tim Murray <[email protected]>
Cc: Venkata Narendra Kumar Gutta <[email protected]>
Cc: Luis Chamberlain <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: [email protected]
Cc: [email protected]
Acked-by: Luis Chamberlain <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

(cherry picked from commit c74f8056621738f5be9f5d3d7e0caa927b21aef6 git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-testing)
Signed-off-by: Mark Salyzyn <[email protected]>
Bug: 32180327
Bug: 137566496
Change-Id: I1250512b27edb56caa78d536e5ccf1fb669476ad
(cherry picked from commit cd403ef6a75c38bc126b1b7f2362ab6426062df0)
This commit is contained in:
Mark Salyzyn 2019-11-13 12:22:46 -08:00 • committed by Mark Salyzyn
commit 82967fe174
2 changed files with 15 additions and 3 deletions
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12
drivers/base/firmware_loader/Kconfig
View file

@ -169,5 +169,17 @@ config FW_LOADER_COMPRESS
be compressed with either none or crc32 integrity check type (pass
"-C crc32" option to xz command).
config FW_CACHE
bool "Enable firmware caching during suspend"
depends on PM_SLEEP
default y if PM_SLEEP
help
Because firmware caching generates uevent messages that are sent
over a netlink socket, it can prevent suspend on many platforms.
It is also not always useful, so on such platforms we have the
option.
If unsure, say Y.
endif # FW_LOADER
endmenu

6
drivers/base/firmware_loader/main.c
View file

@ -51,7 +51,7 @@ struct firmware_cache {
struct list_head head;
int state;
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_FW_CACHE
/*
* Names of firmware images which have been cached successfully
* will be added into the below list so that device uncache
@ -556,7 +556,7 @@ static void fw_set_page_data(struct fw_priv *fw_priv, struct firmware *fw)
(unsigned int)fw_priv->size);
}
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_FW_CACHE
static void fw_name_devm_release(struct device *dev, void *res)
{
struct fw_name_devm *fwn = res;
@ -1046,7 +1046,7 @@ request_firmware_nowait(
}
EXPORT_SYMBOL(request_firmware_nowait);
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_FW_CACHE
static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);
/**