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authorJohannes Berg <johannes.berg@intel.com>2010-03-29 17:57:20 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-21 09:37:30 -0700
commite9045f9178f3e3445a3a5b85206f8681b3869562 (patch)
tree90de949ea1585ebd42112121570a00a2ea3c5708 /drivers/base/firmware_class.c
parent1704f47b50b5d9e1b825e43e1baaf2c5897baf03 (diff)
downloadop-kernel-dev-e9045f9178f3e3445a3a5b85206f8681b3869562.zip
op-kernel-dev-e9045f9178f3e3445a3a5b85206f8681b3869562.tar.gz
firmware class: export nowait to userspace
When we use request_firmware_nowait(), userspace may not want to answer negatively right away when for example it is answering from an initrd only, but with request_firmware() it has to in order to not delay the kernel boot until the request times out. This allows userspace to differentiate between the two in order to be able to reply negatively to async requests only when all filesystems have been mounted and have been checked for the requested firmware file. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/firmware_class.c')
-rw-r--r--drivers/base/firmware_class.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 8e6c62b..d45d1e1 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -50,6 +50,7 @@ struct firmware_priv {
int page_array_size;
const char *vdata;
struct timer_list timeout;
+ bool nowait;
};
#ifdef CONFIG_FW_LOADER
@@ -112,6 +113,8 @@ static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
return -ENOMEM;
if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout))
return -ENOMEM;
+ if (add_uevent_var(env, "ASYNC=%d", fw_priv->nowait))
+ return -ENOMEM;
return 0;
}
@@ -441,7 +444,7 @@ error_kfree:
static int fw_setup_device(struct firmware *fw, struct device **dev_p,
const char *fw_name, struct device *device,
- int uevent)
+ int uevent, bool nowait)
{
struct device *f_dev;
struct firmware_priv *fw_priv;
@@ -457,6 +460,8 @@ static int fw_setup_device(struct firmware *fw, struct device **dev_p,
fw_priv = dev_get_drvdata(f_dev);
+ fw_priv->nowait = nowait;
+
fw_priv->fw = fw;
sysfs_bin_attr_init(&fw_priv->attr_data);
retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
@@ -484,7 +489,7 @@ out:
static int
_request_firmware(const struct firmware **firmware_p, const char *name,
- struct device *device, int uevent)
+ struct device *device, int uevent, bool nowait)
{
struct device *f_dev;
struct firmware_priv *fw_priv;
@@ -516,7 +521,8 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
if (uevent)
dev_dbg(device, "firmware: requesting %s\n", name);
- retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
+ retval = fw_setup_device(firmware, &f_dev, name, device,
+ uevent, nowait);
if (retval)
goto error_kfree_fw;
@@ -573,7 +579,7 @@ request_firmware(const struct firmware **firmware_p, const char *name,
struct device *device)
{
int uevent = 1;
- return _request_firmware(firmware_p, name, device, uevent);
+ return _request_firmware(firmware_p, name, device, uevent, false);
}
/**
@@ -619,7 +625,7 @@ request_firmware_work_func(void *arg)
return 0;
}
ret = _request_firmware(&fw, fw_work->name, fw_work->device,
- fw_work->uevent);
+ fw_work->uevent, true);
fw_work->cont(fw, fw_work->context);
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