[PATCH v2 20/23] soc: qcom: smd-rpm: Use GFP_ATOMIC in write path

Rob Clark
2023-03-20T14:46:40Z

Preparing for better lockdep annotations for things that happen in runpm
suspend/resume path vs shrinker/reclaim in the following patches, we
need to avoid allocations that can trigger reclaim in the icc_set_bw()
path. In the RPMh case, rpmh_write_batch() already uses GFP_ATOMIC, so
it should be reasonable to use in the smd-rpm case as well.

Alternatively, 256bytes is small enough for a function that isn't called
recursively to allocate on-stack.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/soc/qcom/smd-rpm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
index 7e3b6a7ea34c..478da981d9fb 100644
--- a/drivers/soc/qcom/smd-rpm.c
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -113,7 +113,7 @@ int qcom_rpm_smd_write(struct qcom_smd_rpm *rpm,
if (WARN_ON(size >= 256))
return -EINVAL;

- pkt = kmalloc(size, GFP_KERNEL);
+ pkt = kmalloc(size, GFP_ATOMIC);
if (!pkt)
return -ENOMEM;

--
2.39.2