diff mbox series

[5.9,326/757] slimbus: core: check get_addr before removing laddr ida

Message ID 20201027135505.832432063@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Oct. 27, 2020, 1:49 p.m. UTC 
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

[ 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@linaro.org>
Link: https://lore.kernel.org/r/20200925095520.27316-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/slimbus/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c
index ae1e248a8fb8a..58b63ae0e75a6 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);