+ w1-add-fast-search-for-single-slave-bus.patch added to -mm tree

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The patch titled
     Subject: w1: add fast search for single slave bus
has been added to the -mm tree.  Its filename is
     w1-add-fast-search-for-single-slave-bus.patch

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------------------------------------------------------
From: Hubert Feurstein <h.feurstein@xxxxxxxxx>
Subject: w1: add fast search for single slave bus

This enables a much more efficient way of device searching.  It uses the
1-wire read-rom operation which allows the direct reading of the slave
address.  BUT this works only with exactly one slave on the bus.

Signed-off-by: Hubert Feurstein <h.feurstein@xxxxxxxxx>
Acked-by: Evgeniy Polyakov <zbr@xxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Jean-Franois Dagenais <dagenaisj@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 drivers/w1/w1.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff -puN drivers/w1/w1.c~w1-add-fast-search-for-single-slave-bus drivers/w1/w1.c
--- a/drivers/w1/w1.c~w1-add-fast-search-for-single-slave-bus
+++ a/drivers/w1/w1.c
@@ -902,6 +902,16 @@ void w1_search(struct w1_master *dev, u8
 			break;
 		}
 
+		/* Do fast search on single slave bus */
+		if (dev->max_slave_count == 1) {
+			w1_write_8(dev, W1_READ_ROM);
+
+			if (w1_read_block(dev, (u8 *)&rn, 8) == 8 && rn)
+				cb(dev, rn);
+
+			break;
+		}
+
 		/* Start the search */
 		w1_write_8(dev, search_type);
 		for (i = 0; i < 64; ++i) {
_
Subject: Subject: w1: add fast search for single slave bus

Patches currently in -mm which might be from h.feurstein@xxxxxxxxx are

w1-add-fast-search-for-single-slave-bus.patch

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