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path: root/drivers/usb/renesas_usbhs/mod.c
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Diffstat (limited to 'drivers/usb/renesas_usbhs/mod.c')
-rw-r--r--drivers/usb/renesas_usbhs/mod.c25
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