linux-kernel - [RFC PATCH] move aic7xxx to pci_request

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Date:	Wed, 4 Oct 2006 19:43:57 +0000
From:	Frederik Deweerdt <deweerdt@...e.fr>
To:	linux-kernel@...r.kernel.org
Cc:	arjan@...radead.org, matthew@....cx, alan@...rguk.ukuu.org.uk,
	jeff@...zik.org, akpm@...l.org, rdunlap@...otime.net,
	gregkh@...e.de
Subject: [RFC PATCH] move aic7xxx to pci_request_irq

Hi,

This proof-of-concept patch converts the aic7xxx driver to use the
pci_request_irq() function.

Please note that I'm not submitting the driver changes, they're there
only for illustration purposes. I'll CC the appropriate maintainers
when/if an API is agreed upon.

Regards,
Frederik



diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.h b/drivers/scsi/aic7xxx/aic7xxx_osm.h
index 86ea7ac..24f70bc 100644
 drivers/scsi/aic7xxx/aic7xxx_osm.h     |    1 -
 drivers/scsi/aic7xxx/aic7xxx_osm_pci.c |   13 -------------
 drivers/scsi/aic7xxx/aic7xxx_pci.c     |   18 ++++++++++++------
 3 files changed, 12 insertions(+), 20 deletions(-)

Index: 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_osm.h
===================================================================
--- 2.6.18-mm3.orig/drivers/scsi/aic7xxx/aic7xxx_osm.h
+++ 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_osm.h
@@ -561,7 +561,6 @@ static inline void	ahc_linux_eisa_exit(v
 int			 ahc_linux_pci_init(void);
 void			 ahc_linux_pci_exit(void);
 int			 ahc_pci_map_registers(struct ahc_softc *ahc);
-int			 ahc_pci_map_int(struct ahc_softc *ahc);
 
 static __inline uint32_t ahc_pci_read_config(ahc_dev_softc_t pci,
 					     int reg, int width);
Index: 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
===================================================================
--- 2.6.18-mm3.orig/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
+++ 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -368,16 +368,3 @@ ahc_pci_map_registers(struct ahc_softc *
 	return (error);
 }
 
-int
-ahc_pci_map_int(struct ahc_softc *ahc)
-{
-	int error;
-
-	error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
-			    IRQF_SHARED, "aic7xxx", ahc);
-	if (error == 0)
-		ahc->platform_data->irq = ahc->dev_softc->irq;
-	
-	return (-error);
-}
-
Index: 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_pci.c
===================================================================
--- 2.6.18-mm3.orig/drivers/scsi/aic7xxx/aic7xxx_pci.c
+++ 2.6.18-mm3/drivers/scsi/aic7xxx/aic7xxx_pci.c
@@ -968,13 +968,19 @@ ahc_pci_config(struct ahc_softc *ahc, st
 
 	/*
 	 * Allow interrupts now that we are completely setup.
-	 */
-	error = ahc_pci_map_int(ahc);
-	if (error != 0)
-		return (error);
+	 *
+	 * Note: pci_request_irq return value is negated due to aic7xxx
+	 * error handling style
+	 */
+	error = -pci_request_irq(ahc->dev_softc, ahc_linux_isr,
+				 0, "aic7xxx");
+
+	if (!error) {
+		ahc->platform_data->irq = ahc->dev_softc->irq;
+		ahc->init_level++;
+	}
 
-	ahc->init_level++;
-	return (0);
+	return error;
 }
 
 /*
-
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