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| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2018-06-04 12:39:01 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2018-06-04 22:35:03 +0300 |
| commit | 4a2e84c6ed85434ce7843e4844b4d3263f7e233b (patch) | |
| tree | 44ce7a2a7f84a94d1b3888149f26b7131424a9ca /drivers | |
| parent | 136200f4fd365a0a9c549893c9641f6eeff53f22 (diff) | |
| download | linux-4a2e84c6ed85434ce7843e4844b4d3263f7e233b.tar.xz | |
rpmsg: smd: do not use mananged resources for endpoints and channels
All the managed resources would be freed by the time release function
is invoked. Handling such memory in qcom_smd_edge_release() would do
bad things.
Found this issue while testing Audio usecase where the dsp is started up
and shutdown in a loop.
This patch fixes this issue by using simple kzalloc for allocating
channel->name and channel which is then freed in qcom_smd_edge_release().
Without this patch restarting a remoteproc would crash the system.
Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend")
Cc: <stable@vger.kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rpmsg/qcom_smd.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c index 6d01eefe2bda..6437bbeebc91 100644 --- a/drivers/rpmsg/qcom_smd.c +++ b/drivers/rpmsg/qcom_smd.c @@ -1108,12 +1108,12 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed void *info; int ret; - channel = devm_kzalloc(&edge->dev, sizeof(*channel), GFP_KERNEL); + channel = kzalloc(sizeof(*channel), GFP_KERNEL); if (!channel) return ERR_PTR(-ENOMEM); channel->edge = edge; - channel->name = devm_kstrdup(&edge->dev, name, GFP_KERNEL); + channel->name = kstrdup(name, GFP_KERNEL); if (!channel->name) return ERR_PTR(-ENOMEM); @@ -1164,8 +1164,8 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed return channel; free_name_and_channel: - devm_kfree(&edge->dev, channel->name); - devm_kfree(&edge->dev, channel); + kfree(channel->name); + kfree(channel); return ERR_PTR(ret); } @@ -1396,13 +1396,13 @@ static int qcom_smd_parse_edge(struct device *dev, */ static void qcom_smd_edge_release(struct device *dev) { - struct qcom_smd_channel *channel; + struct qcom_smd_channel *channel, *tmp; struct qcom_smd_edge *edge = to_smd_edge(dev); - list_for_each_entry(channel, &edge->channels, list) { - SET_RX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED); - SET_RX_CHANNEL_INFO(channel, head, 0); - SET_RX_CHANNEL_INFO(channel, tail, 0); + list_for_each_entry_safe(channel, tmp, &edge->channels, list) { + list_del(&channel->list); + kfree(channel->name); + kfree(channel); } kfree(edge); |