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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2018-06-04 12:39:01 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-06-04 22:35:03 +0300
commit4a2e84c6ed85434ce7843e4844b4d3263f7e233b (patch)
tree44ce7a2a7f84a94d1b3888149f26b7131424a9ca /drivers/rpmsg/qcom_smd.c
parent136200f4fd365a0a9c549893c9641f6eeff53f22 (diff)
downloadlinux-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/rpmsg/qcom_smd.c')
-rw-r--r--drivers/rpmsg/qcom_smd.c18
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);