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| author | Darius Augulis <augulis.darius@gmail.com> | 2009-01-21 15:18:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-24 16:20:28 -0700 |
| commit | d24921a36df31332c32e1bb539671284d9e36bfa (patch) | |
| tree | c983e57a9ed5c257d58d3bfe33d81ccf8e1780cf /drivers/usb/gadget/imx_udc.c | |
| parent | 593bef6c75e11d2edb5396bd9775cf49a4cda659 (diff) | |
| download | lwn-d24921a36df31332c32e1bb539671284d9e36bfa.tar.gz lwn-d24921a36df31332c32e1bb539671284d9e36bfa.zip | |
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/gadget/imx_udc.c')
| -rw-r--r-- | drivers/usb/gadget/imx_udc.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c index 3ee5bd8bea70..e590464c3a50 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)); |