From: Colin Ian King Date: Sun, 3 Sep 2017 13:06:01 +0000 (+0100) Subject: rpmsg: glink: initialize ret to zero to ensure error status check is correct X-Git-Tag: v4.14-rc1~75^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ed43d098f9020d6669a00bd26fac807d5c19e202;p=platform%2Fkernel%2Flinux-rpi3.git rpmsg: glink: initialize ret to zero to ensure error status check is correct 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 Signed-off-by: Bjorn Andersson --- diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 8bc0d04..5a5e927 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -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);