[PATCH 5.4 165/408] slimbus: core: check get_addr before removing laddr ida

[Greg Kroah-Hartman]

From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>

[ Upstream commit f97769fde678e111a1b7b165b380d8a3dfe54f4e ]

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: 46a2bb5a7f7e ("slimbus: core: Add slim controllers support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200925095520.27316-2-srinivas.kandagatla@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 63ee96eb58c68..42a233fc5dc6c 100644
--- a/drivers/slimbus/core.c
+++ b/drivers/slimbus/core.c
@@ -327,8 +327,8 @@ 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);
-- 
2.25.1