Delete NO_IRQ usage from I2C subsystem

Delete NO_IRQ usage from I2C subsystem

[Wolfram Sang]

This is a resend of my patch series from October (rebased). Only Grant's acks
have been added. Further explanation in the patches itself. Ben, can you pick
them up or tell Grant to do so?

Kind regards,

   Wolfram

[PATCH RESEND 1/3] i2c/mpc: drop NO_IRQ

[Wolfram Sang]

Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
---
 drivers/i2c/busses/i2c-mpc.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 78a15af..72a26a2 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -117,7 +117,7 @@ static int i2c_wait(struct mpc_i2c *i2c, unsigned timeout, int writing)
 	u32 x;
 	int result = 0;
 
-	if (i2c->irq == NO_IRQ) {
+	if (!i2c->irq) {
 		while (!(readb(i2c->base + MPC_I2C_SR) & CSR_MIF)) {
 			schedule();
 			if (time_after(jiffies, orig_jiffies + timeout)) {
@@ -567,7 +567,7 @@ static int __devinit fsl_i2c_probe(struct of_device *op,
 	}
 
 	i2c->irq = irq_of_parse_and_map(op->node, 0);
-	if (i2c->irq != NO_IRQ) { /* i2c->irq = NO_IRQ implies polling */
+	if (i2c->irq) { /* no i2c->irq implies polling */
 		result = request_irq(i2c->irq, mpc_i2c_isr,
 				     IRQF_SHARED, "i2c-mpc", i2c);
 		if (result < 0) {
@@ -626,7 +626,7 @@ static int __devexit fsl_i2c_remove(struct of_device *op)
 	i2c_del_adapter(&i2c->adap);
 	dev_set_drvdata(&op->dev, NULL);
 
-	if (i2c->irq != NO_IRQ)
+	if (i2c->irq)
 		free_irq(i2c->irq, i2c);
 
 	irq_dispose_mapping(i2c->irq);
-- 
1.7.0

[PATCH RESEND 2/3] i2c/cpm: drop NO_IRQ

[Wolfram Sang]

Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Jochen Friedrich <jochen-NIgtFMG+Po8@public.gmane.org>
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
---
 drivers/i2c/busses/i2c-cpm.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 9c2e100..16948db 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -441,7 +441,7 @@ static int __devinit cpm_i2c_setup(struct cpm_i2c *cpm)
 	init_waitqueue_head(&cpm->i2c_wait);
 
 	cpm->irq = of_irq_to_resource(ofdev->node, 0, NULL);
-	if (cpm->irq == NO_IRQ)
+	if (!cpm->irq)
 		return -EINVAL;
 
 	/* Install interrupt handler. */
-- 
1.7.0

Re: [PATCH RESEND 2/3] i2c/cpm: drop NO_IRQ

[Jochen Friedrich]

Wolfram Sang wrote:

> Drop NO_IRQ as 0 is the preferred way to describe 'no irq'

> Signed-off-by: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Acked-by: Jochen Friedrich <jochen-NIgtFMG+Po8@public.gmane.org>

Thanks,
Jochen

[PATCH RESEND 3/3] i2c/ibm-iic: drop NO_IRQ

[Wolfram Sang]

Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Sean MacLennan <smaclennan-Qtffpm9i2AVWk0Htik3J/w@public.gmane.org>
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
---
 drivers/i2c/busses/i2c-ibm_iic.c |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index b1bc6e2..2bef534 100644
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -668,12 +668,12 @@ static int __devinit iic_request_irq(struct of_device *ofdev,
 	int irq;
 
 	if (iic_force_poll)
-		return NO_IRQ;
+		return 0;
 
 	irq = irq_of_parse_and_map(np, 0);
-	if (irq == NO_IRQ) {
+	if (!irq) {
 		dev_err(&ofdev->dev, "irq_of_parse_and_map failed\n");
-		return NO_IRQ;
+		return 0;
 	}
 
 	/* Disable interrupts until we finish initialization, assumes
@@ -683,7 +683,7 @@ static int __devinit iic_request_irq(struct of_device *ofdev,
 	if (request_irq(irq, iic_handler, 0, "IBM IIC", dev)) {
 		dev_err(&ofdev->dev, "request_irq %d failed\n", irq);
 		/* Fallback to the polling mode */
-		return NO_IRQ;
+		return 0;
 	}
 
 	return irq;
@@ -719,7 +719,7 @@ static int __devinit iic_probe(struct of_device *ofdev,
 	init_waitqueue_head(&dev->wq);
 
 	dev->irq = iic_request_irq(ofdev, dev);
-	if (dev->irq == NO_IRQ)
+	if (!dev->irq)
 		dev_warn(&ofdev->dev, "using polling mode\n");
 
 	/* Board specific settings */
@@ -766,7 +766,7 @@ static int __devinit iic_probe(struct of_device *ofdev,
 	return 0;
 
 error_cleanup:
-	if (dev->irq != NO_IRQ) {
+	if (dev->irq) {
 		iic_interrupt_mode(dev, 0);
 		free_irq(dev->irq, dev);
 	}
@@ -790,7 +790,7 @@ static int __devexit iic_remove(struct of_device *ofdev)
 
 	i2c_del_adapter(&dev->adap);
 
-	if (dev->irq != NO_IRQ) {
+	if (dev->irq) {
 		iic_interrupt_mode(dev, 0);
 		free_irq(dev->irq, dev);
 	}
-- 
1.7.0

Re: [PATCH RESEND 3/3] i2c/ibm-iic: drop NO_IRQ

[Sean MacLennan]

On Fri,  2 Apr 2010 02:17:01 +0200
Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> wrote:

> Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
> (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the
> driver is only used on powerpc, where NO_IRQ is 0 anyhow.
> 
> Signed-off-by: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> Acked-by: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>

Acked-by: Sean MacLennan <smaclennan-Qtffpm9i2AVWk0Htik3J/w@public.gmane.org>

Cheers,
   Sean

Re: [PATCH RESEND 3/3] i2c/ibm-iic: drop NO_IRQ

[Benjamin Herrenschmidt]

On Fri, 2010-04-02 at 02:17 +0200, Wolfram Sang wrote:
> Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
> (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
> only used on powerpc, where NO_IRQ is 0 anyhow.

Oops... forgot those. Applied, will show up in -next soon.

Cheers,
Ben.

> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> Cc: Sean MacLennan <smaclennan@pikatech.com>
> Cc: Ben Dooks <ben-linux@fluff.org>
> ---
>  drivers/i2c/busses/i2c-ibm_iic.c |   14 +++++++-------
>  1 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
> index b1bc6e2..2bef534 100644
> --- a/drivers/i2c/busses/i2c-ibm_iic.c
> +++ b/drivers/i2c/busses/i2c-ibm_iic.c
> @@ -668,12 +668,12 @@ static int __devinit iic_request_irq(struct of_device *ofdev,
>  	int irq;
>  
>  	if (iic_force_poll)
> -		return NO_IRQ;
> +		return 0;
>  
>  	irq = irq_of_parse_and_map(np, 0);
> -	if (irq == NO_IRQ) {
> +	if (!irq) {
>  		dev_err(&ofdev->dev, "irq_of_parse_and_map failed\n");
> -		return NO_IRQ;
> +		return 0;
>  	}
>  
>  	/* Disable interrupts until we finish initialization, assumes
> @@ -683,7 +683,7 @@ static int __devinit iic_request_irq(struct of_device *ofdev,
>  	if (request_irq(irq, iic_handler, 0, "IBM IIC", dev)) {
>  		dev_err(&ofdev->dev, "request_irq %d failed\n", irq);
>  		/* Fallback to the polling mode */
> -		return NO_IRQ;
> +		return 0;
>  	}
>  
>  	return irq;
> @@ -719,7 +719,7 @@ static int __devinit iic_probe(struct of_device *ofdev,
>  	init_waitqueue_head(&dev->wq);
>  
>  	dev->irq = iic_request_irq(ofdev, dev);
> -	if (dev->irq == NO_IRQ)
> +	if (!dev->irq)
>  		dev_warn(&ofdev->dev, "using polling mode\n");
>  
>  	/* Board specific settings */
> @@ -766,7 +766,7 @@ static int __devinit iic_probe(struct of_device *ofdev,
>  	return 0;
>  
>  error_cleanup:
> -	if (dev->irq != NO_IRQ) {
> +	if (dev->irq) {
>  		iic_interrupt_mode(dev, 0);
>  		free_irq(dev->irq, dev);
>  	}
> @@ -790,7 +790,7 @@ static int __devexit iic_remove(struct of_device *ofdev)
>  
>  	i2c_del_adapter(&dev->adap);
>  
> -	if (dev->irq != NO_IRQ) {
> +	if (dev->irq) {
>  		iic_interrupt_mode(dev, 0);
>  		free_irq(dev->irq, dev);
>  	}

Re: [PATCH RESEND 3/3] i2c/ibm-iic: drop NO_IRQ

[Wolfram Sang]

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On Tue, Apr 27, 2010 at 05:06:14PM +1000, Benjamin Herrenschmidt wrote:
> On Fri, 2010-04-02 at 02:17 +0200, Wolfram Sang wrote:
> > Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
> > (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
> > only used on powerpc, where NO_IRQ is 0 anyhow.
> 
> Oops... forgot those. Applied, will show up in -next soon.

Ah, thanks. I also asked Ben Dooks to pick them up, but better twice than never
;)

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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Re: [PATCH RESEND 3/3] i2c/ibm-iic: drop NO_IRQ

[Benjamin Herrenschmidt]

On Tue, 2010-04-27 at 09:12 +0200, Wolfram Sang wrote:
> > Oops... forgot those. Applied, will show up in -next soon.
> 
> Ah, thanks. I also asked Ben Dooks to pick them up, but better twice
> than never
> ;)

Ok, Ben, are you taking them or do you want me to ?

Cheers,
Ben.