From: David Brownell <david-b@pacbell.net>
Date: Sun, 3 Jun 2007 20:50:40 +0000 (-0700)
Subject: SPI dynamic busid generation bugfix
X-Git-Tag: firefly_0821_release~28781
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e44a45ae7b7f7c7a4ebd6aa39b703bf2b97fe848;p=firefly-linux-kernel-4.4.55.git

SPI dynamic busid generation bugfix

Fix SPI dynamic bus ID assignment to start at 2^15-1 rather than a negative
number.  Valid bus ids are supposed to be positive, and are (now) stored in
an 's16' value.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index c3219b29b5ac..4831edbae2d5 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -411,7 +411,7 @@ EXPORT_SYMBOL_GPL(spi_alloc_master);
  */
 int spi_register_master(struct spi_master *master)
 {
-	static atomic_t		dyn_bus_id = ATOMIC_INIT((1<<16) - 1);
+	static atomic_t		dyn_bus_id = ATOMIC_INIT((1<<15) - 1);
 	struct device		*dev = master->cdev.dev;
 	int			status = -ENODEV;
 	int			dynamic = 0;