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Subject[PATCH v2 06/11] firmware: move loading timeout under struct firmware_fallback_config
Date
The timeout is a fallback construct, so we can just stuff the
timeout configuration under struct firmware_fallback_config.

While at it, add a few helpers which vets the use of getting or
setting the timeout as an int. The main use of the timeout is
to set a timeout for completion, and that is used as an unsigned
long. There a few cases however where it makes sense to get or
set the timeout as an int, the helpers annotate these use cases
have been properly vetted for.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
---
drivers/base/firmware_loader.c | 46 ++++++++++++++++++++++++++++++------------
1 file changed, 33 insertions(+), 13 deletions(-)

diff --git a/drivers/base/firmware_loader.c b/drivers/base/firmware_loader.c
index 2d819875348d..9757f9fff01e 100644
--- a/drivers/base/firmware_loader.c
+++ b/drivers/base/firmware_loader.c
@@ -266,21 +266,38 @@ static inline bool fw_state_is_aborted(struct fw_priv *fw_priv)
*
* @force_sysfs_fallback: force the sysfs fallback mechanism to be used
* as if one had enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y.
+ * @old_timeout: for internal use
+ * @loading_timeout: the timeout to wait for the fallback mechanism before
+ * giving up, in seconds.
*/
struct firmware_fallback_config {
- bool force_sysfs_fallback;
+ const bool force_sysfs_fallback;
+ int old_timeout;
+ int loading_timeout;
};

-static const struct firmware_fallback_config fw_fallback_config = {
+static struct firmware_fallback_config fw_fallback_config = {
.force_sysfs_fallback = IS_ENABLED(CONFIG_FW_LOADER_USER_HELPER_FALLBACK),
+ .loading_timeout = 60,
+ .old_timeout = 60,
};

-static int old_timeout;
-static int loading_timeout = 60; /* In seconds */
+/* These getters are vetted to use int properly */
+static inline int __firmware_loading_timeout(void)
+{
+ return fw_fallback_config.loading_timeout;
+}
+
+/* These setters are vetted to use int properly */
+static void __fw_fallback_set_timeout(int timeout)
+{
+ fw_fallback_config.loading_timeout = timeout;
+}

static inline long firmware_loading_timeout(void)
{
- return loading_timeout > 0 ? loading_timeout * HZ : MAX_JIFFY_OFFSET;
+ return __firmware_loading_timeout() > 0 ?
+ __firmware_loading_timeout() * HZ : MAX_JIFFY_OFFSET;
}

/*
@@ -291,14 +308,14 @@ static inline long firmware_loading_timeout(void)
*/
static void fw_fallback_set_cache_timeout(void)
{
- old_timeout = loading_timeout;
- loading_timeout = 10;
+ fw_fallback_config.old_timeout = __firmware_loading_timeout();
+ __fw_fallback_set_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;
+ __fw_fallback_set_timeout(fw_fallback_config.old_timeout);
}

static inline bool fw_sysfs_done(struct fw_priv *fw_priv)
@@ -677,7 +694,7 @@ static void kill_pending_fw_fallback_reqs(bool only_kill_custom)
static ssize_t timeout_show(struct class *class, struct class_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", loading_timeout);
+ return sprintf(buf, "%d\n", __firmware_loading_timeout());
}

/**
@@ -696,9 +713,12 @@ static ssize_t timeout_show(struct class *class, struct class_attribute *attr,
static ssize_t timeout_store(struct class *class, struct class_attribute *attr,
const char *buf, size_t count)
{
- loading_timeout = simple_strtol(buf, NULL, 10);
- if (loading_timeout < 0)
- loading_timeout = 0;
+ int tmp_loading_timeout = simple_strtol(buf, NULL, 10);
+
+ if (tmp_loading_timeout < 0)
+ tmp_loading_timeout = 0;
+
+ __fw_fallback_set_timeout(tmp_loading_timeout);

return count;
}
@@ -721,7 +741,7 @@ static int do_firmware_uevent(struct fw_sysfs *fw_sysfs, struct kobj_uevent_env
{
if (add_uevent_var(env, "FIRMWARE=%s", fw_sysfs->fw_priv->fw_name))
return -ENOMEM;
- if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout))
+ if (add_uevent_var(env, "TIMEOUT=%i", __firmware_loading_timeout()))
return -ENOMEM;
if (add_uevent_var(env, "ASYNC=%d", fw_sysfs->nowait))
return -ENOMEM;
--
2.16.1
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