Patch "pata-rb532-cf: get rid of the irq_to_gpio() call" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

pata-rb532-cf: get rid of the irq_to_gpio() call

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     pata-rb532-cf-get-rid-of-the-irq_to_gpio-call.patch

and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gabor Juhos <[email protected]>
Date: Wed, 17 Feb 2016 12:58:20 +0100
Subject: pata-rb532-cf: get rid of the irq_to_gpio() call

From: Gabor Juhos <[email protected]>

commit 018361767a21fb2d5ebd3ac182c04baf8a8b4e08 upstream.

The RB532 platform specific irq_to_gpio() implementation has been removed with commit 832f5dacfa0b ("MIPS: Remove all the uses of custom gpio.h"). Now the platform uses the generic stub which causes the following error:

pata-rb532-cf pata-rb532-cf: no GPIO found for irq149
pata-rb532-cf: probe of pata-rb532-cf failed with error -2

Drop the irq_to_gpio() call and get the GPIO number from platform data instead. After this change, the driver works again:

  scsi host0: pata-rb532-cf
  ata1: PATA max PIO4 irq 149
  ata1.00: CFA: CF 1GB, 20080820, max MWDMA4
  ata1.00: 1989792 sectors, multi 0: LBA
  ata1.00: configured for PIO4
  scsi 0:0:0:0: Direct-Access     ATA      CF 1GB           0820 PQ: 0\
  ANSI: 5
  sd 0:0:0:0: [sda] 1989792 512-byte logical blocks: (1.01 GB/971 MiB)
  sd 0:0:0:0: [sda] Write Protect is off
  sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't\
  support DPO or FUA
   sda: sda1 sda2
  sd 0:0:0:0: [sda] Attached SCSI disk

---
 drivers/ata/pata_rb532_cf.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

@@ -32,6 +32,8 @@
 #include <linux/libata.h>
 #include <scsi/scsi_host.h>
 
+#include <asm/mach-rc32434/rb.h>
+
 #define DRV_NAME	"pata-rb532-cf"
 #define DRV_VERSION	"0.1.0"
 #define DRV_DESC	"PATA driver for RouterBOARD 532 Compact Flash"

@@ -107,6 +109,7 @@ static int rb532_pata_driver_probe(struc
 	int gpio;
 	struct resource *res;
 	struct ata_host *ah;
+	struct cf_device *pdata;
 	struct rb532_cf_info *info;
 	int ret;
 

@@ -122,7 +125,13 @@ static int rb532_pata_driver_probe(struc
 		return -ENOENT;
 	}
 
-	gpio = irq_to_gpio(irq);
+	pdata = dev_get_platdata(&pdev->dev);
+	if (!pdata) {
+		dev_err(&pdev->dev, "no platform data specified\n");
+		return -EINVAL;
+	}
+
+	gpio = pdata->gpio_pin;
 	if (gpio < 0) {
 		dev_err(&pdev->dev, "no GPIO found for irq%d\n", irq);
 		return -ENOENT;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/pata-rb532-cf-get-rid-of-the-irq_to_gpio-call.patch