Merge branch 'ux500-gpio-pins-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/gpio

Linus Walleij <linus.walleij@linaro.org> writes:

 This is a pull request for the GPIO and pin control stuff
 accumulated in the ST-Ericsson tree. Here we have:

 - Improvements and fixes and a custom pin config API from
   Rabin Vincent

 - Device Tree bindings from Lee Jones

 - Some accumulated patches by yours truly.

 - A MSP platform data init patch from Ola Lilja that is merged
   here due to dependency on pin config work. It is to be
   used with work being worked on in parallel in the ALSA
   SoC subsystem.

 If you wonder about the custom pin config implementation this
 is to be used as a transition base as I am rewriting the
 driver to use pinctrl. Expect a final pull request on top
 of this one that will move the ux500 over to pinctrl.

* 'ux500-gpio-pins-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  ARM: ux500: Add support for MSP I2S-devices
  drivers/gpio: gpio-nomadik: Add support for irqdomains
  drivers/gpio: gpio-nomadik: Apply Device Tree bindings
  ARM: ux500: update pin handling
  ARM: ux500: implement pin API
  ARM: ux500: remove a bunch of internal pull-ups
  plat-nomadik: new sleep mode pincfg macros
  gpio/nomadik: use ioremap() instead of static mappings
  gpio/nomadik: support low EMI mode
  gpio/nomadik: fix spurious interrupts with SKE
  gpio/nomadik: cache [rf]w?imsc
  gpio/nomadik: don't set SLPM to 1 for non-wakeup pins

Also includes an update to v3.4-rc4.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 29 insertions, 12 deletions

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 0e4ef3de9d5d..0d39f2f4294a 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -375,6 +375,34 @@ static int init_vq(struct virtio_blk *vblk)
 	return err;
 }
 
+/*
+ * Legacy naming scheme used for virtio devices.  We are stuck with it for
+ * virtio blk but don't ever use it for any new driver.
+ */
+static int virtblk_name_format(char *prefix, int index, char *buf, int buflen)
+{
+	const int base = 'z' - 'a' + 1;
+	char *begin = buf + strlen(prefix);
+	char *end = buf + buflen;
+	char *p;
+	int unit;
+
+	p = end - 1;
+	*p = '\0';
+	unit = base;
+	do {
+		if (p == begin)
+			return -EINVAL;
+		*--p = 'a' + (index % unit);
+		index = (index / unit) - 1;
+	} while (index >= 0);
+
+	memmove(begin, p, end - p);
+	memcpy(buf, prefix, strlen(prefix));
+
+	return 0;
+}
+
 static int __devinit virtblk_probe(struct virtio_device *vdev)
 {
 	struct virtio_blk *vblk;
@@ -443,18 +471,7 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
 
 	q->queuedata = vblk;
 
-	if (index < 26) {
-		sprintf(vblk->disk->disk_name, "vd%c", 'a' + index % 26);
-	} else if (index < (26 + 1) * 26) {
-		sprintf(vblk->disk->disk_name, "vd%c%c",
-			'a' + index / 26 - 1, 'a' + index % 26);
-	} else {
-		const unsigned int m1 = (index / 26 - 1) / 26 - 1;
-		const unsigned int m2 = (index / 26 - 1) % 26;
-		const unsigned int m3 =  index % 26;
-		sprintf(vblk->disk->disk_name, "vd%c%c%c",
-			'a' + m1, 'a' + m2, 'a' + m3);
-	}
+	virtblk_name_format("vd", index, vblk->disk->disk_name, DISK_NAME_LEN);
 
 	vblk->disk->major = major;
 	vblk->disk->first_minor = index_to_minor(index);