diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/renesas_usbhs/mod.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c index 82a628f96c03..35c5208f3249 100644 --- a/drivers/usb/renesas_usbhs/mod.c +++ b/drivers/usb/renesas_usbhs/mod.c @@ -209,14 +209,18 @@ int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) return (int)irq_state->intsts0 & CTSQ_MASK; } -static void usbhs_status_get_each_irq(struct usbhs_priv *priv, - struct usbhs_irq_state *state) +static int usbhs_status_get_each_irq(struct usbhs_priv *priv, + struct usbhs_irq_state *state) { struct usbhs_mod *mod = usbhs_mod_get_current(priv); + u16 intenb0, intenb1; state->intsts0 = usbhs_read(priv, INTSTS0); state->intsts1 = usbhs_read(priv, INTSTS1); + intenb0 = usbhs_read(priv, INTENB0); + intenb1 = usbhs_read(priv, INTENB1); + /* mask */ if (mod) { state->brdysts = usbhs_read(priv, BRDYSTS); @@ -226,6 +230,20 @@ static void usbhs_status_get_each_irq(struct usbhs_priv *priv, state->bempsts &= mod->irq_bempsts; state->brdysts &= mod->irq_brdysts; } + + /* + * Check whether the irq enable registers and the irq status are set + * when IRQF_SHARED is set. + */ + if (priv->irqflags & IRQF_SHARED) { + if (!(intenb0 & state->intsts0) && + !(intenb1 & state->intsts1) && + !(state->bempsts) && + !(state->brdysts)) + return -EIO; + } + + return 0; } /* @@ -238,7 +256,8 @@ static irqreturn_t usbhs_interrupt(int irq, void *data) struct usbhs_priv *priv = data; struct usbhs_irq_state irq_state; - usbhs_status_get_each_irq(priv, &irq_state); + if (usbhs_status_get_each_irq(priv, &irq_state) < 0) + return IRQ_NONE; /* * clear interrupt |