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author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-04-03 06:10:57 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 12:11:33 +0300 |
commit | d02c6eb5d3df54224292ac4aef00c5d11a3d028e (patch) | |
tree | c65f926d94dd0fd90fc55b59e7fe3e0109059e89 | |
parent | 840565b1351abaaa35608795a16438bd4e94a1fe (diff) | |
download | linux-d02c6eb5d3df54224292ac4aef00c5d11a3d028e.tar.xz |
soc: qcom: pmic_glink: don't traverse clients list without a lock
[ Upstream commit 635ce0db89567ba62f64b79e8c6664ba3eff6516 ]
Take the client_lock before traversing the clients list at the
pmic_glink_state_notify_clients() function. This is required to keep the
list traversal safe from concurrent modification.
Fixes: 58ef4ece1e41 ("soc: qcom: pmic_glink: Introduce base PMIC GLINK driver")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Tested-by: Xilin Wu <wuxilin123@gmail.com> # on QCS8550 AYN Odin 2
Link: https://lore.kernel.org/r/20240403-pmic-glink-fix-clients-v2-1-aed4e02baacc@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r-- | drivers/soc/qcom/pmic_glink.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c index d5a4e71633ed..c6dca5278e61 100644 --- a/drivers/soc/qcom/pmic_glink.c +++ b/drivers/soc/qcom/pmic_glink.c @@ -118,10 +118,12 @@ static int pmic_glink_rpmsg_callback(struct rpmsg_device *rpdev, void *data, hdr = data; + mutex_lock(&pg->client_lock); list_for_each_entry(client, &pg->clients, node) { if (client->id == le32_to_cpu(hdr->owner)) client->cb(data, len, client->priv); } + mutex_unlock(&pg->client_lock); return 0; } @@ -171,8 +173,10 @@ static void pmic_glink_state_notify_clients(struct pmic_glink *pg) } if (new_state != pg->client_state) { + mutex_lock(&pg->client_lock); list_for_each_entry(client, &pg->clients, node) client->pdr_notify(client->priv, new_state); + mutex_unlock(&pg->client_lock); pg->client_state = new_state; } } |