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Diffstat (limited to 'drivers/base/firmware_class.c')
-rw-r--r--drivers/base/firmware_class.c51
1 files changed, 30 insertions, 21 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 60290671f04a..72c644b191a4 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -81,6 +81,11 @@ enum {
static int loading_timeout = 60; /* In seconds */
+static inline long firmware_loading_timeout(void)
+{
+ return loading_timeout > 0 ? loading_timeout * HZ : MAX_SCHEDULE_TIMEOUT;
+}
+
/* fw_lock could be moved to 'struct firmware_priv' but since it is just
* guarding for corner cases a global lock should be OK */
static DEFINE_MUTEX(fw_lock);
@@ -541,31 +546,22 @@ static void _request_firmware_cleanup(const struct firmware **firmware_p)
static int _request_firmware(const struct firmware *firmware,
const char *name, struct device *device,
- bool uevent, bool nowait)
+ bool uevent, bool nowait, long timeout)
{
struct firmware_priv *fw_priv;
- int retval;
-
- retval = usermodehelper_read_trylock();
- if (WARN_ON(retval)) {
- dev_err(device, "firmware: %s will not be loaded\n", name);
- return retval;
- }
+ int retval = 0;
if (uevent)
dev_dbg(device, "firmware: requesting %s\n", name);
fw_priv = fw_create_instance(firmware, name, device, uevent, nowait);
- if (IS_ERR(fw_priv)) {
- retval = PTR_ERR(fw_priv);
- goto out;
- }
+ if (IS_ERR(fw_priv))
+ return PTR_ERR(fw_priv);
if (uevent) {
- if (loading_timeout > 0)
+ if (timeout != MAX_SCHEDULE_TIMEOUT)
mod_timer(&fw_priv->timeout,
- round_jiffies_up(jiffies +
- loading_timeout * HZ));
+ round_jiffies_up(jiffies + timeout));
kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
}
@@ -582,9 +578,6 @@ static int _request_firmware(const struct firmware *firmware,
mutex_unlock(&fw_lock);
fw_destroy_instance(fw_priv);
-
-out:
- usermodehelper_read_unlock();
return retval;
}
@@ -613,7 +606,14 @@ request_firmware(const struct firmware **firmware_p, const char *name,
if (ret <= 0)
return ret;
- ret = _request_firmware(*firmware_p, name, device, true, false);
+ ret = usermodehelper_read_trylock();
+ if (WARN_ON(ret)) {
+ dev_err(device, "firmware: %s will not be loaded\n", name);
+ } else {
+ ret = _request_firmware(*firmware_p, name, device, true, false,
+ firmware_loading_timeout());
+ usermodehelper_read_unlock();
+ }
if (ret)
_request_firmware_cleanup(firmware_p);
@@ -648,6 +648,7 @@ static int request_firmware_work_func(void *arg)
{
struct firmware_work *fw_work = arg;
const struct firmware *fw;
+ long timeout;
int ret;
if (!arg) {
@@ -659,8 +660,16 @@ static int request_firmware_work_func(void *arg)
if (ret <= 0)
goto out;
- ret = _request_firmware(fw, fw_work->name, fw_work->device,
- fw_work->uevent, true);
+ timeout = usermodehelper_read_lock_wait(firmware_loading_timeout());
+ if (timeout) {
+ ret = _request_firmware(fw, fw_work->name, fw_work->device,
+ fw_work->uevent, true, timeout);
+ usermodehelper_read_unlock();
+ } else {
+ dev_dbg(fw_work->device, "firmware: %s loading timed out\n",
+ fw_work->name);
+ ret = -EAGAIN;
+ }
if (ret)
_request_firmware_cleanup(&fw);