Hi,
does anybody have hardware to test patches for adutux?
This should allow support for O_NONBLOCK in the write path.
Regards
Oliver
--
commit c94b4e9e71c86f188be5162ea9d2081573edeed2
Author: Oliver Neukum <oliver@xxxxxxxxxx>
Date: Wed Sep 9 09:13:22 2009 +0200
usb:adutux: O_NONBLOCK in read
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index 2035265..8b38f03 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -499,6 +499,8 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
}
/* we wait for I/O to complete */
+ if (file->f_flags & O_NONBLOCK)
+ goto skip;
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&dev->read_wait, &wait);
spin_lock_irqsave(&dev->buflock, flags);
@@ -526,7 +528,8 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
}
}
- retval = bytes_read;
+skip:
+ retval = bytes_read ? bytes_read : -EAGAIN;
/* if the primary buffer is empty then use it */
spin_lock_irqsave(&dev->buflock, flags);
if (should_submit && dev->read_urb_finished) {
--
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