diff options
| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2015-01-06 14:47:01 +0100 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-01-12 12:13:29 -0600 |
| commit | 9870d895ad87efae130b2990db9ba265271f113b (patch) | |
| tree | 91a5c0b8936d86e62eafafac27e84a96760e7315 /drivers | |
| parent | 258e2ddd634c20065d1c41290d10d2e5cf2f56e2 (diff) | |
| download | linux-9870d895ad87efae130b2990db9ba265271f113b.tar.bz2 | |
usb: atmel_usba_udc: Mask status with enabled irqs
Avoid interpreting useless status flags when we're not waiting for such
events by masking the status variable with the interrupt enabled register
value.
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Reported-by: Patrice VILCHEZ <patrice.vilchez@atmel.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/udc/atmel_usba_udc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index 55c8dde67f83..bc3a53264c43 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c @@ -1612,12 +1612,14 @@ static irqreturn_t usba_udc_irq(int irq, void *devid) spin_lock(&udc->lock); - status = usba_readl(udc, INT_STA); + status = usba_readl(udc, INT_STA) & usba_readl(udc, INT_ENB); DBG(DBG_INT, "irq, status=%#08x\n", status); if (status & USBA_DET_SUSPEND) { toggle_bias(udc, 0); usba_writel(udc, INT_CLR, USBA_DET_SUSPEND); + usba_writel(udc, INT_ENB, + usba_readl(udc, INT_ENB) | USBA_WAKE_UP); udc->bias_pulse_needed = true; DBG(DBG_BUS, "Suspend detected\n"); if (udc->gadget.speed != USB_SPEED_UNKNOWN @@ -1631,6 +1633,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid) if (status & USBA_WAKE_UP) { toggle_bias(udc, 1); usba_writel(udc, INT_CLR, USBA_WAKE_UP); + usba_writel(udc, INT_ENB, + usba_readl(udc, INT_ENB) & ~USBA_WAKE_UP); DBG(DBG_BUS, "Wake Up CPU detected\n"); } |