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firmware_class: make firmware caching configurable 

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 <salyzyn@android.com>
Cc: Tim Murray <timmurray@google.com>
Cc: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20191113225429.118495-1-salyzyn@android.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Salyzyn 2019-11-13 14:54:26 -08:00 committed by Greg Kroah-Hartman
parent bee3bbe616
commit 030cc787c3
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
@ -557,7 +557,7 @@ 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;
@ -1047,7 +1047,7 @@ request_firmware_nowait(
}
EXPORT_SYMBOL(request_firmware_nowait);
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_FW_CACHE
static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);
/**