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rpmsg: glink: initialize ret to zero to ensure error status check is correct

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The new switch cases for RPM_CMD_RX_DONE, RPM_CMD_RX_DONE_W_REUSE,
RPM_CMD_RX_INTENT_REQ_ACK, RPM_CMD_INTENT and RPM_CMD_RX_INTENT_REQ from
4 recent commits are not setting ret and so a later non-zero check on ret
is testing on a garbage value in ret. Fix this by initializing ret to zero.

Detected by CoverityScan CID#1455249 ("Uninitialized scalar variable")

Fixes: 933b45da5d1d ("rpmsg: glink: Add support for TX intents)
Fixes: dacbb35e930f ("glink: Receive and store the remote intent buffers")
Fixes: 27b9c5b66b23 ("rpmsg: glink: Request for intents when unavailable")
Fixes: 88c6060f5a7f ("rpmsg: glink: Handle remote rx done command")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Colin Ian King 2017-09-03 14:06:01 +01:00 committed by Bjorn Andersson
parent 906cf29cfa
commit ed43d098f9
1 changed files with 1 additions and 3 deletions
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4
drivers/rpmsg/qcom_glink_native.c
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@ -957,7 +957,7 @@ static irqreturn_t qcom_glink_native_intr(int irq, void *data)
unsigned int param2;
unsigned int avail;
unsigned int cmd;
int ret;
int ret = 0;
for (;;) {
avail = qcom_glink_rx_avail(glink);
@ -994,8 +994,6 @@ static irqreturn_t qcom_glink_native_intr(int irq, void *data)
mbox_send_message(glink->mbox_chan, NULL);
mbox_client_txdone(glink->mbox_chan, 0);
ret = 0;
break;
case RPM_CMD_INTENT:
qcom_glink_handle_intent(glink, param1, param2, avail);