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firmware: use helpers for setting up a temporary cache timeout 

We only use the timeout for the firmware fallback mechanism
except for trying to set the timeout during the cache setup
for resume/suspend. For those cases, setting the timeout should
be a no-op, so just reflect this in code by adding helpers for it.

This change introduces no functional changes.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Luis R. Rodriguez 2018-03-10 06:14:47 -08:00 committed by Greg Kroah-Hartman
parent b2e9a8553c
commit 5d9566b144
1 changed files with 30 additions and 19 deletions
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49
drivers/base/firmware_loader.c
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@ -191,13 +191,6 @@ static inline bool fw_is_builtin_firmware(const struct firmware *fw)
}
#endif
static int loading_timeout = 60; /* In seconds */
static inline long firmware_loading_timeout(void)
{
return loading_timeout > 0 ? loading_timeout * HZ : MAX_JIFFY_OFFSET;
}
static void fw_state_init(struct fw_priv *fw_priv)
{
struct fw_state *fw_st = &fw_priv->fw_st;
@ -282,6 +275,32 @@ static const struct firmware_fallback_config fw_fallback_config = {
.force_sysfs_fallback = IS_ENABLED(CONFIG_FW_LOADER_USER_HELPER_FALLBACK),
};
static int old_timeout;
static int loading_timeout = 60; /* In seconds */
static inline long firmware_loading_timeout(void)
{
return loading_timeout > 0 ? loading_timeout * HZ : MAX_JIFFY_OFFSET;
}
/*
* use small loading timeout for caching devices' firmware because all these
* firmware images have been loaded successfully at lease once, also system is
* ready for completing firmware loading now. The maximum size of firmware in
* current distributions is about 2M bytes, so 10 secs should be enough.
*/
static void fw_fallback_set_cache_timeout(void)
{
old_timeout = loading_timeout;
loading_timeout = 10;
}
/* Restores the timeout to the value last configured during normal operation */
static void fw_fallback_set_default_timeout(void)
{
loading_timeout = old_timeout;
}
static inline bool fw_sysfs_done(struct fw_priv *fw_priv)
{
return __fw_state_check(fw_priv, FW_STATUS_DONE);
@ -1206,6 +1225,8 @@ static int fw_sysfs_fallback(struct firmware *fw, const char *name,
}
static inline void kill_pending_fw_fallback_reqs(bool only_kill_custom) { }
static inline void fw_fallback_set_cache_timeout(void) { }
static inline void fw_fallback_set_default_timeout(void) { }
static inline int register_sysfs_loader(void)
{
@ -1752,7 +1773,6 @@ static void __device_uncache_fw_images(void)
static void device_cache_fw_images(void)
{
struct firmware_cache *fwc = &fw_cache;
int old_timeout;
DEFINE_WAIT(wait);
pr_debug("%s\n", __func__);
@ -1760,16 +1780,7 @@ static void device_cache_fw_images(void)
/* cancel uncache work */
cancel_delayed_work_sync(&fwc->work);
/*
* use small loading timeout for caching devices' firmware
* because all these firmware images have been loaded
* successfully at lease once, also system is ready for
* completing firmware loading now. The maximum size of
* firmware in current distributions is about 2M bytes,
* so 10 secs should be enough.
*/
old_timeout = loading_timeout;
loading_timeout = 10;
fw_fallback_set_cache_timeout();
mutex_lock(&fw_lock);
fwc->state = FW_LOADER_START_CACHE;
@ -1779,7 +1790,7 @@ static void device_cache_fw_images(void)
/* wait for completion of caching firmware for all devices */
async_synchronize_full_domain(&fw_cache_domain);
loading_timeout = old_timeout;
fw_fallback_set_default_timeout();
}
/**