diff options
| author |   Bjorn Andersson <bjorn.andersson@sonymobile.com> | 2015-09-24 18:37:18 -0700 |
|---|---|---|
| committer |   Andy Gross <agross@codeaurora.org> | 2015-10-14 14:51:21 -0500 |
| commit | a208ca98ff63e5c94d03810bc80fee9b02fe9972 (patch) | |
| tree | 7b7fe023c0b162a348d16eaf4e4aa22beb9655f7 /drivers/soc/qcom/smd.c | |
| parent | soc: qcom: smd: Handle big endian CPUs (diff) | |
| download | linux-dev-a208ca98ff63e5c94d03810bc80fee9b02fe9972.tar.xz linux-dev-a208ca98ff63e5c94d03810bc80fee9b02fe9972.zip | |
soc: qcom: smd: Reject send of too big packets
Attempting to find room for a packet that's bigger than the fifo will
never succeed and the calling process will be sleeping forever in the
loop, waiting for enough room. So fail early instead.
Reported-by: Courtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Andy Gross <agross@codeaurora.org>
Diffstat (limited to 'drivers/soc/qcom/smd.c')
| -rw-r--r-- | drivers/soc/qcom/smd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c index 18964f154383..88353bda1ea4 100644 --- a/drivers/soc/qcom/smd.c +++ b/drivers/soc/qcom/smd.c @@ -723,6 +723,10 @@ int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len) if (channel->info_word && len % 4) return -EINVAL; + /* Reject packets that are too big */ + if (tlen >= channel->fifo_size) + return -EINVAL; + ret = mutex_lock_interruptible(&channel->tx_lock); if (ret) return ret; |