6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jonathan Marek <jonathan@xxxxxxxx> [ Upstream commit 06c59d97f63c1b8af521fa5aef8a716fb988b285 ] The name len field of the CMD_OPEN packet is only 16-bits and the upper 16-bits of "param2" are a different "prio" field, which can be nonzero in certain situations, and CMD_OPEN packets can be unexpectedly dropped because of this. Fix this by masking out the upper 16 bits of param2. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Signed-off-by: Jonathan Marek <jonathan@xxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Link: https://lore.kernel.org/r/20241007235935.6216-1-jonathan@xxxxxxxx Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/rpmsg/qcom_glink_native.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index d877a1a1aeb4b..c7f91a82e634f 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1117,7 +1117,8 @@ void qcom_glink_native_rx(struct qcom_glink *glink) qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8)); break; case GLINK_CMD_OPEN: - ret = qcom_glink_rx_defer(glink, param2); + /* upper 16 bits of param2 are the "prio" field */ + ret = qcom_glink_rx_defer(glink, param2 & 0xffff); break; case GLINK_CMD_TX_DATA: case GLINK_CMD_TX_DATA_CONT: -- 2.43.0