lkml.org 
[lkml]   [2011]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Getting request_firmware() filename info from user space
Peter Hsiang wrote:
> Using the kernel request_firmware() function, it seems one can send any file by:
> cat myfile.bin > /sys/class/firmware/xxxx/data
>
> How does the user space code obtain the filename parameter specified in the request_firmware() call?
>
> The documentation says $DEVPATH and $FIRMWARE variables are provided in
> the environment, but "echo $FIRMWARE" prints an empty string.

drivers/base/firmware_class.c has:

static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct firmware_priv *fw_priv = to_firmware_priv(dev);

if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id))
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;
}

Are these available at least in the udev rule?


Regards,
Clemens


\
 
 \ /
  Last update: 2011-06-21 09:57    [W:0.039 / U:0.736 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site