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USB: usb_control_msg wait for driver ISR to set status.

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This patch changes usb_control_msg back to the state prior to commit
4886720844.

The USB driver ISR routine may update the status.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
This commit is contained in:
Remy Bohmer 2010-02-01 19:40:47 +01:00
parent 6e20e64f5c
commit 84d36b3018
1 changed files with 12 additions and 7 deletions
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19
common/usb.c
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@ -197,16 +197,21 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe,
if (timeout == 0)
return (int)size;
if (dev->status != 0) {
/*
* Let's wait a while for the timeout to elapse.
* It has no real use, but it keeps the interface happy.
*/
wait_ms(timeout);
return -1;
/*
* Wait for status to update until timeout expires, USB driver
* interrupt handler may set the status when the USB operation has
* been completed.
*/
while (timeout--) {
if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
break;
wait_ms(1);
}
if (dev->status)
return -1;
return dev->act_len;
}
/*-------------------------------------------------------------------