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Date: Thu, 8 Mar 2012 21:01:18 +0100
From: Jiri Slaby <jslaby@...e.cz>
To: gregkh@...uxfoundation.org
Cc: alan@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] [IA64] hpsim, initialize chip for assigned irqs
Currently, when assign_irq_vector is called and the irq connected in
the simulator, the irq is not ready. request_irq will return ENOSYS
immediately. It is because the irq chip is unset.
Hence set the chip properly to irq_type_hp_sim. And make sure this is
done from both users of simulated interrupts.
Also we have to set handler here, otherwise we end up in
handle_bad_int resulting in spam in logs and no irqs handled. We use
handle_simple_irq as these are SW interrupts that need no ACK or
anything.
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
arch/ia64/hp/sim/hpsim_irq.c | 36 ++++++++++++++++++++++++++++++------
arch/ia64/hp/sim/hpsim_setup.c | 6 ------
arch/ia64/hp/sim/simeth.c | 19 +++----------------
arch/ia64/hp/sim/simserial.c | 3 +--
arch/ia64/include/asm/hpsim.h | 2 +-
5 files changed, 35 insertions(+), 31 deletions(-)
diff --git a/arch/ia64/hp/sim/hpsim_irq.c b/arch/ia64/hp/sim/hpsim_irq.c
index 4bd9a63..0aa70eb 100644
--- a/arch/ia64/hp/sim/hpsim_irq.c
+++ b/arch/ia64/hp/sim/hpsim_irq.c
@@ -10,6 +10,8 @@
#include <linux/sched.h>
#include <linux/irq.h>
+#include "hpsim_ssc.h"
+
static unsigned int
hpsim_irq_startup(struct irq_data *data)
{
@@ -37,15 +39,37 @@ static struct irq_chip irq_type_hp_sim = {
.irq_set_affinity = hpsim_set_affinity_noop,
};
+static void hpsim_irq_set_chip(int irq)
+{
+ struct irq_chip *chip = irq_get_chip(irq);
+
+ if (chip == &no_irq_chip)
+ irq_set_chip(irq, &irq_type_hp_sim);
+}
+
+static void hpsim_connect_irq(int intr, int irq)
+{
+ ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
+}
+
+int hpsim_get_irq(int intr)
+{
+ int irq = assign_irq_vector(AUTO_ASSIGN);
+
+ if (irq >= 0) {
+ hpsim_irq_set_chip(irq);
+ irq_set_handler(irq, handle_simple_irq);
+ hpsim_connect_irq(intr, irq);
+ }
+
+ return irq;
+}
+
void __init
hpsim_irq_init (void)
{
int i;
- for_each_active_irq(i) {
- struct irq_chip *chip = irq_get_chip(i);
-
- if (chip == &no_irq_chip)
- irq_set_chip(i, &irq_type_hp_sim);
- }
+ for_each_active_irq(i)
+ hpsim_irq_set_chip(i);
}
diff --git a/arch/ia64/hp/sim/hpsim_setup.c b/arch/ia64/hp/sim/hpsim_setup.c
index f629e90..664a540 100644
--- a/arch/ia64/hp/sim/hpsim_setup.c
+++ b/arch/ia64/hp/sim/hpsim_setup.c
@@ -26,12 +26,6 @@
#include "hpsim_ssc.h"
void
-ia64_ssc_connect_irq (long intr, long irq)
-{
- ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
-}
-
-void
ia64_ctl_trace (long on)
{
ia64_ssc(on, 0, 0, 0, SSC_CTL_TRACE);
diff --git a/arch/ia64/hp/sim/simeth.c b/arch/ia64/hp/sim/simeth.c
index 47afcc6..e343357 100644
--- a/arch/ia64/hp/sim/simeth.c
+++ b/arch/ia64/hp/sim/simeth.c
@@ -129,17 +129,6 @@ netdev_probe(char *name, unsigned char *ether)
static inline int
-netdev_connect(int irq)
-{
- /* XXX Fix me
- * this does not support multiple cards
- * also no return value
- */
- ia64_ssc_connect_irq(NETWORK_INTR, irq);
- return 0;
-}
-
-static inline int
netdev_attach(int fd, int irq, unsigned int ipaddr)
{
/* this puts the host interface in the right mode (start interrupting) */
@@ -226,15 +215,13 @@ simeth_probe1(void)
return err;
}
- if ((rc = assign_irq_vector(AUTO_ASSIGN)) < 0)
- panic("%s: out of interrupt vectors!\n", __func__);
- dev->irq = rc;
-
/*
* attach the interrupt in the simulator, this does enable interrupts
* until a netdev_attach() is called
*/
- netdev_connect(dev->irq);
+ if ((rc = hpsim_get_irq(NETWORK_INTR)) < 0)
+ panic("%s: out of interrupt vectors!\n", __func__);
+ dev->irq = rc;
printk(KERN_INFO "%s: hosteth=%s simfd=%d, HwAddr",
dev->name, simeth_device, local->simfd);
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 974cac8..797e89a 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -947,11 +947,10 @@ simrs_init (void)
if (state->type == PORT_UNKNOWN) continue;
if (!state->irq) {
- if ((rc = assign_irq_vector(AUTO_ASSIGN)) < 0)
+ if ((rc = hpsim_get_irq(KEYBOARD_INTR)) < 0)
panic("%s: out of interrupt vectors!\n",
__func__);
state->irq = rc;
- ia64_ssc_connect_irq(KEYBOARD_INTR, state->irq);
}
printk(KERN_INFO "ttyS%d at 0x%04lx (irq = %d) is a %s\n",
diff --git a/arch/ia64/include/asm/hpsim.h b/arch/ia64/include/asm/hpsim.h
index 892ab19..0fe5022 100644
--- a/arch/ia64/include/asm/hpsim.h
+++ b/arch/ia64/include/asm/hpsim.h
@@ -10,7 +10,7 @@ int simcons_register(void);
struct tty_driver;
extern struct tty_driver *hp_simserial_driver;
-void ia64_ssc_connect_irq(long intr, long irq);
+extern int hpsim_get_irq(int intr);
void ia64_ctl_trace(long on);
#endif
--
1.7.9.2
--
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