Hi
On Sat, Sep 20, 2014 at 5:01 PM, Hans de Goede hdegoede@redhat.com wrote:
Preperation patch to use create_int_queue outside of ehci-hcd.c .
Signed-off-by: Hans de Goede hdegoede@redhat.com
drivers/usb/host/ehci-hcd.c | 36 +++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 20830d7..cf3e3c0 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1163,6 +1163,23 @@ create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize, struct int_queue *result = NULL; int i;
/** Interrupt transfers requiring several transactions are not supported* because bInterval is ignored.** Also, ehci_submit_async() relies on wMaxPacketSize being a power of 2* <= PKT_ALIGN if several qTDs are required, while the USB* specification does not constrain this for interrupt transfers. That* means that ehci_submit_async() would support interrupt transfers* requiring several transactions only as long as the transfer size does* not require more than a single qTD.*/if (elementsize > usb_maxpacket(dev, pipe)) {printf("%s: xfers requiring several transactions are not supported.\n",__func__);return NULL;}debug("Enter create_int_queue\n"); if (usb_pipetype(pipe) != PIPE_INTERRUPT) { debug("non-interrupt pipe (type=%lu)", usb_pipetype(pipe));@@ -1384,24 +1401,9 @@ submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d", dev, pipe, buffer, length, interval);
/** Interrupt transfers requiring several transactions are not supported* because bInterval is ignored.** Also, ehci_submit_async() relies on wMaxPacketSize being a power of 2* <= PKT_ALIGN if several qTDs are required, while the USB* specification does not constrain this for interrupt transfers. That* means that ehci_submit_async() would support interrupt transfers* requiring several transactions only as long as the transfer size does* not require more than a single qTD.*/if (length > usb_maxpacket(dev, pipe)) {printf("%s: Interrupt transfers requiring several ""transactions are not supported.\n", __func__);return -1;}queue = create_int_queue(dev, pipe, 1, length, buffer);
if (!queue)return -1;
Can you return a more consistent error code?
Michael
timeout = get_timer(0) + USB_TIMEOUT_MS(pipe); while ((backbuffer = poll_int_queue(dev, queue)) == NULL)-- 2.1.0
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