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usb-ohci: Use proper memory barriers always 

Compiler barriers are not useful for ordering memory
accesses.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-08-06 16:05:38 +10:00
parent fa6de662a9
commit 77107650e8
1 changed files with 2 additions and 2 deletions
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4
lib/libusb/usb-ohci.c
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@ -418,7 +418,7 @@ static int ohci_send_ctrl(struct usb_pipe *pipe, struct usb_dev_req *req, void *
ohci_fill_ed(ed, PTR_U32(td_phys), td_next, attr, 0);
dprintf("usb-ohci: %s - td_start %x td_end %x req %x\n", __func__,
td_phys, td_next, req_phys);
barrier();
mb();
ed->attr &= cpu_to_le32(~EDA_SKIP);
ohcd = pipe->dev->hcidev->priv;
@ -510,7 +510,7 @@ static int ohci_transfer_bulk(struct usb_pipe *pipe, void *td_ptr,
td_next = ohci_get_td_phys(td, tds, td_phys);
ohci_fill_ed(ed, td_phys, td_next, attr, 0);
dprintf("usb-ohci: %s - tds %p td %p\n", __func__, td_phys, td_next);
barrier();
mb();
ed->attr &= cpu_to_le32(~EDA_SKIP);
ohcd = pipe->dev->hcidev->priv;