linux-kernel - [PATCH 1/3] slimbus: core: check get

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Message-Id: <20200925095520.27316-2-srinivas.kandagatla@linaro.org>
Date:   Fri, 25 Sep 2020 10:55:18 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/3] slimbus: core: check get_addr before removing laddr ida

logical address can be either assigned by the SLIMBus controller or the core.
Core uses IDA in cases where get_addr callback is not provided by the
controller.
Core already has this check while allocating IDR, however during absence
reporting this is not checked. This patch fixes this issue.

Fixes: 46a2bb5a7f7ea("slimbus: core: Add slim controllers support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 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 ae1e248a8fb8..58b63ae0e75a 100644
--- a/drivers/slimbus/core.c
+++ b/drivers/slimbus/core.c
@@ -326,8 +326,8 @@ void slim_report_absent(struct slim_device *sbdev)
 	mutex_lock(&ctrl->lock);
 	sbdev->is_laddr_valid = false;
 	mutex_unlock(&ctrl->lock);
-
-	ida_simple_remove(&ctrl->laddr_ida, sbdev->laddr);
+	if (!ctrl->get_laddr)
+		ida_simple_remove(&ctrl->laddr_ida, sbdev->laddr);
 	slim_device_update_status(sbdev, SLIM_DEVICE_STATUS_DOWN);
 }
 EXPORT_SYMBOL_GPL(slim_report_absent);
-- 
2.21.0