linux-kernel - [PATCH] slimbus: core: Remove usage of the deprecated ida_simple

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Message-Id: <8402a9a8a45937fe2e62617ff0c7408503692b20.1702745212.git.christophe.jaillet@wanadoo.fr>
Date: Sat, 16 Dec 2023 17:47:34 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	alsa-devel@...a-project.org
Subject: [PATCH] slimbus: core: Remove usage of the deprecated ida_simple_xx() API

ida_alloc() and ida_free() should be preferred to the deprecated
ida_simple_get() and ida_simple_remove().

Note that the upper limit of ida_simple_get() is exclusive, but the one of
ida_alloc_range() is inclusive. So change this change allows one more
device. Previously address 0xFE was never used.

Fixes: 46a2bb5a7f7e ("slimbus: core: Add slim controllers support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
/!\ Untested /!\

The change of behavior is motivated by the comment in
drivers/slimbus/slimbus.h stating that /* Manager's logical address is set
to 0xFF per spec */, so all other values, including 0xFE should be valid,
IMHO.

So considering this as a bug-fix, I added a Fixes tag.
---
 drivers/slimbus/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c
index d43873bb5fe6..01cbd4621981 100644
--- a/drivers/slimbus/core.c
+++ b/drivers/slimbus/core.c
@@ -436,8 +436,8 @@ static int slim_device_alloc_laddr(struct slim_device *sbdev,
 		if (ret < 0)
 			goto err;
 	} else if (report_present) {
-		ret = ida_simple_get(&ctrl->laddr_ida,
-				     0, SLIM_LA_MANAGER - 1, GFP_KERNEL);
+		ret = ida_alloc_max(&ctrl->laddr_ida,
+				    SLIM_LA_MANAGER - 1, GFP_KERNEL);
 		if (ret < 0)
 			goto err;
 
-- 
2.34.1