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authorBjorn Andersson <bjorn.andersson@linaro.org>2017-12-12 15:58:56 -0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2017-12-18 21:50:09 -0800
commitb2c932e7991ca7e3995457463b72fc34e64477a0 (patch)
treef0fe8507eb25b58de6fd8a5f3505ccb19ab61182 /drivers/rpmsg
parenteb114f27fd3a6fd5005e07818043993bda67d8d1 (diff)
rpmsg: smd: Fail send on a closed channel
Move the check for a closed channel out from the tx-full loop to fail any send request on a non-open channel. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/qcom_smd.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 0993e95bf0f5..ed167ab52a68 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -743,17 +743,13 @@ static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
if (ret)
return ret;
- while (qcom_smd_get_tx_avail(channel) < tlen) {
+ while (qcom_smd_get_tx_avail(channel) < tlen &&
+ channel->state == SMD_CHANNEL_OPENED) {
if (!wait) {
ret = -EAGAIN;
goto out;
}
- if (channel->state != SMD_CHANNEL_OPENED) {
- ret = -EPIPE;
- goto out;
- }
-
SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 0);
ret = wait_event_interruptible(channel->fblockread_event,
@@ -765,6 +761,12 @@ static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
}
+ /* Fail if the channel was closed */
+ if (channel->state != SMD_CHANNEL_OPENED) {
+ ret = -EPIPE;
+ goto out;
+ }
+
SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
qcom_smd_write_fifo(channel, hdr, sizeof(hdr));

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