diff options
| author | Jonathan Marek <jonathan@marek.ca> | 2024-10-07 19:59:35 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 14:02:25 +0100 |
| commit | a02229d8f949f8176bea6a3577d70427dc4bb1d4 (patch) | |
| tree | 686c5d440240227c3410fa9efeb57dd8fade2f57 | |
| parent | 9946b4be0863a03694b0511d1c36e027b8efcc56 (diff) | |
rpmsg: glink: use only lower 16-bits of param2 for CMD_OPEN name length
[ 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@marek.ca>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20241007235935.6216-1-jonathan@marek.ca
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/rpmsg/qcom_glink_native.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index d3af1dfa3c7d..a2f9d85c7156 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1204,7 +1204,8 @@ void qcom_glink_native_rx(struct qcom_glink *glink) ret = qcom_glink_rx_open_ack(glink, param1); 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: |