[PATCH 6.8 060/172] cxl: Remove checking of iter in cxl_endpoint_get_perf_coordinates()

Greg Kroah-Hartman
2024-04-15T14:26:21Z

From: Dave Jiang <dave.jiang@intel.com>

[ Upstream commit 648dae58a830ecceea3b1bebf68432435980f137 ]

The while() loop in cxl_endpoint_get_perf_coordinates() checks to see if
'iter' is valid as part of the condition breaking out of the loop.
is_cxl_root() will stop the loop before the next iteration could go NULL.
Remove the iter check.

The presence of the iter or removing the iter does not impact the behavior
of the code. This is a code clean up and not a bug fix.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20240403154844.3403859-2-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Stable-dep-of: 592780b8391f ("cxl: Fix retrieving of access_coordinates in PCIe path")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/cxl/core/port.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index b2a2f6c34886d..0332b431117db 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -2160,7 +2160,7 @@ int cxl_endpoint_get_perf_coordinates(struct cxl_port *port,
* port each iteration. If the parent is cxl root then there is
* nothing to gather.
*/
- while (iter && !is_cxl_root(to_cxl_port(iter->dev.parent))) {
+ while (!is_cxl_root(to_cxl_port(iter->dev.parent))) {
cxl_coordinates_combine(&c, &c, &dport->sw_coord);
c.write_latency += dport->link_latency;
c.read_latency += dport->link_latency;
--
2.43.0