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Subject[PATCH] firmware: simplify defining and handling FW_OPT_FALLBACK
Date
From: Rafał Miłecki <rafal@milecki.pl>

I found handling of FW_OPT_FALLBACK a bit complex. It was defined using
another option and their values were dependent on kernel config.

It was also non-trivial to follow the code. Some callers were using
FW_OPT_FALLBACK which was confusing since the _request_firmware function
was always checking for FW_OPT_USERHELPER (the same bit in a relevan
configuration).

With this patch FW_OPT_USERHELPER gets its own bit and is explicitly
checked in the _request_firmware which hopefully makes code easier to
understand.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
drivers/base/firmware_class.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 22d1760..0524f8b 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -112,13 +112,9 @@ static inline long firmware_loading_timeout(void)
#else
#define FW_OPT_USERHELPER 0
#endif
-#ifdef CONFIG_FW_LOADER_USER_HELPER_FALLBACK
-#define FW_OPT_FALLBACK FW_OPT_USERHELPER
-#else
-#define FW_OPT_FALLBACK 0
-#endif
#define FW_OPT_NO_WARN (1U << 3)
#define FW_OPT_NOCACHE (1U << 4)
+#define FW_OPT_FALLBACK (1U << 5)

struct firmware_cache {
/* firmware_buf instance will be added into the below list */
@@ -1175,8 +1171,12 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
dev_warn(device,
"Direct firmware load for %s failed with error %d\n",
name, ret);
- if (opt_flags & FW_OPT_USERHELPER) {
+ if (config_enabled(CONFIG_FW_LOADER_USER_HELPER_FALLBACK) &&
+ opt_flags & FW_OPT_FALLBACK) {
dev_warn(device, "Falling back to user helper\n");
+ opt_flags |= FW_OPT_USERHELPER;
+ }
+ if (opt_flags & FW_OPT_USERHELPER) {
ret = fw_load_from_user_helper(fw, name, device,
opt_flags, timeout);
}
--
2.10.1
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