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OMAP:MUSB: Corrects urb unlink function path 

Fixes kernel panic while ISO IN transfer is aborted.Replaced
usb_hcd_unlink_urb_from_ep() from musb_giveback() to __musb_giveback()
to make sure urb is unlinked before giveback when __musb_giveback() is
called from musb_urb_dequeue().

Acquired musb->lock() before usb_hcd_unlink_urb_from_ep() within in
enqueue path.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ajay Kumar Gupta 2008-09-11 11:53:21 +03:00 committed by Greg Kroah-Hartman
parent ae5ad29639
commit 2492e6747f
1 changed files with 5 additions and 2 deletions
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7
drivers/usb/musb/musb_host.c
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@ -291,6 +291,7 @@ __acquires(musb->lock)
urb->actual_length, urb->transfer_buffer_length
);
usb_hcd_unlink_urb_from_ep(musb_to_hcd(musb), urb);
spin_unlock(&musb->lock);
usb_hcd_giveback_urb(musb_to_hcd(musb), urb, status);
spin_lock(&musb->lock);
@ -353,8 +354,6 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
break;
}
usb_hcd_unlink_urb_from_ep(musb_to_hcd(musb), urb);
qh->is_ready = 0;
__musb_giveback(musb, urb, status);
qh->is_ready = ready;
@ -1791,7 +1790,9 @@ static int musb_urb_enqueue(
*/
qh = kzalloc(sizeof *qh, mem_flags);
if (!qh) {
spin_lock_irqsave(&musb->lock, flags);
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&musb->lock, flags);
return -ENOMEM;
}
@ -1907,7 +1908,9 @@ static int musb_urb_enqueue(
done:
if (ret != 0) {
spin_lock_irqsave(&musb->lock, flags);
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&musb->lock, flags);
kfree(qh);
}
return ret;