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rpmsg: glink: use only lower 16-bits of param2 for CMD_OPEN name length

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[ 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: b4f8e52b89 ("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>
This commit is contained in:
Jonathan Marek
2024-10-07 19:59:35 -04:00
committed by Greg Kroah-Hartman
parent c437af60c4
commit ab897ca4d7
1 changed files with 2 additions and 1 deletions
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3
drivers/rpmsg/qcom_glink_native.c
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@@ -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: