w1: increase w1_max_slave_count, allow write access

w1_max_slave_count is only used to abort the search early
or take a fast search (when 1), so there isn't any reason to not allow
it to be updated through sysfs.  Memory is not allocated based on
the current value and 10 is a rather low base number, increasing to
64, and printing a message the first time the count is reached and
there were more devices to discover to let the user know why not
all the devices were found.

Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h
index bc329d2bba28..bd10b3c2a406 100644
--- a/drivers/w1/w1.h
+++ b/drivers/w1/w1.h
@@ -158,9 +158,11 @@ struct w1_bus_master
 /**
  * enum w1_master_flags - bitfields used in w1_master.flags
  * @W1_ABORT_SEARCH: abort searching early on shutdown
+ * @W1_WARN_MAX_COUNT: limit warning when the maximum count is reached
  */
 enum w1_master_flags {
         W1_ABORT_SEARCH = 0,
+        W1_WARN_MAX_COUNT = 1,
 };
 
 struct w1_master