From e4115805cf2020da94e8bd1296243605cda487ff Mon Sep 17 00:00:00 2001
From: Daniel Ritz <daniel.ritz@gmx.ch>
Date: Tue, 20 Sep 2005 14:17:37 -0700
Subject: [PATCH] [PATCH] yenta: optimize interrupt handler
Don't waste cpu time in yenta interrupt handler when the interrupt was for
another device.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
drivers/pcmcia/yenta_socket.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index ec6ab65f08722..8bfe72b713028 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -531,6 +531,9 @@ static irqreturn_t yenta_interrupt(int irq, void *dev_id, struct pt_regs *regs)
csc = exca_readb(socket, I365_CSC);
+ if (!(cb_event || csc))
+ return IRQ_NONE;
+
events = (cb_event & (CB_CD1EVENT | CB_CD2EVENT)) ? SS_DETECT : 0 ;
events |= (csc & I365_CSC_DETECT) ? SS_DETECT : 0;
if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) {
@@ -544,10 +547,7 @@ static irqreturn_t yenta_interrupt(int irq, void *dev_id, struct pt_regs *regs)
if (events)
pcmcia_parse_events(&socket->socket, events);
- if (cb_event || csc)
- return IRQ_HANDLED;
-
- return IRQ_NONE;
+ return IRQ_HANDLED;
}
static void yenta_interrupt_wrapper(unsigned long data)
--
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