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authorDarius Augulis <augulis.darius@gmail.com>2009-01-21 15:18:33 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 16:20:28 -0700
commitd24921a36df31332c32e1bb539671284d9e36bfa (patch)
treec983e57a9ed5c257d58d3bfe33d81ccf8e1780cf /drivers/usb
parent593bef6c75e11d2edb5396bd9775cf49a4cda659 (diff)
USB: imx_udc: Fix IMX UDC gadget ep0 irq handling
Fix ep0 interrupt handling in IMX UDC Gadget. Signed-off-by: Darius Augulis <augulis.darius@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/imx_udc.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 3ee5bd8bea7..e590464c3a5 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1133,6 +1133,7 @@ end_irq:
static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev)
{
struct imx_udc_struct *imx_usb = dev;
+ struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0];
int intr = __raw_readl(imx_usb->base + USB_EP_INTR(0));
dump_ep_intr(__func__, 0, intr, imx_usb->dev);
@@ -1142,16 +1143,15 @@ static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev)
return IRQ_HANDLED;
}
- /* DEVREQ IRQ has highest priority */
+ /* DEVREQ has highest priority */
if (intr & (EPINTR_DEVREQ | EPINTR_MDEVREQ))
handle_ep0_devreq(imx_usb);
/* Seem i.MX is missing EOF interrupt sometimes.
- * Therefore we monitor both EOF and FIFO_EMPTY interrups
- * when transmiting, and both EOF and FIFO_FULL when
- * receiving data.
+ * Therefore we don't monitor EOF.
+ * We call handle_ep0() only if a request is queued for ep0.
*/
- else if (intr & (EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL))
- handle_ep0(&imx_usb->imx_ep[0]);
+ else if (!list_empty(&imx_ep->queue))
+ handle_ep0(imx_ep);
__raw_writel(intr, imx_usb->base + USB_EP_INTR(0));