diff options
| author |   Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2019-06-20 04:39:00 -0400 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-06-27 07:17:24 -0400 |
| commit | 3d51dc03a4eeb78eac676a559ee984f4f1bb455c (patch) | |
| tree | ac901bd051c784e132dc94085bb8878e3083ebef /drivers/media | |
| parent | media: MAINTAINERS: Add maintainers for Media Controller (diff) | |
| download | linux-dev-3d51dc03a4eeb78eac676a559ee984f4f1bb455c.tar.xz linux-dev-3d51dc03a4eeb78eac676a559ee984f4f1bb455c.zip | |
media: cec-notifier: rename variables, check kstrdup and n->conn_name
dev -> hdmi_dev
conn -> conn_name
Check if n->conn_name is not NULL before calling strcmp.
Check the result of kstrdup, and clean up on error.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/cec/cec-notifier.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/media/cec/cec-notifier.c b/drivers/media/cec/cec-notifier.c index 9598c7778871..f72b19c351dd 100644 --- a/drivers/media/cec/cec-notifier.c +++ b/drivers/media/cec/cec-notifier.c @@ -21,8 +21,8 @@ struct cec_notifier { struct mutex lock; struct list_head head; struct kref kref; - struct device *dev; - const char *conn; + struct device *hdmi_dev; + const char *conn_name; struct cec_adapter *cec_adap; void (*callback)(struct cec_adapter *adap, u16 pa); @@ -32,14 +32,16 @@ struct cec_notifier { static LIST_HEAD(cec_notifiers); static DEFINE_MUTEX(cec_notifiers_lock); -struct cec_notifier *cec_notifier_get_conn(struct device *dev, const char *conn) +struct cec_notifier * +cec_notifier_get_conn(struct device *hdmi_dev, const char *conn_name) { struct cec_notifier *n; mutex_lock(&cec_notifiers_lock); list_for_each_entry(n, &cec_notifiers, head) { - if (n->dev == dev && - (!conn || !strcmp(n->conn, conn))) { + if (n->hdmi_dev == hdmi_dev && + (!conn_name || + (n->conn_name && !strcmp(n->conn_name, conn_name)))) { kref_get(&n->kref); mutex_unlock(&cec_notifiers_lock); return n; @@ -48,10 +50,17 @@ struct cec_notifier *cec_notifier_get_conn(struct device *dev, const char *conn) n = kzalloc(sizeof(*n), GFP_KERNEL); if (!n) goto unlock; - n->dev = dev; - if (conn) - n->conn = kstrdup(conn, GFP_KERNEL); + n->hdmi_dev = hdmi_dev; + if (conn_name) { + n->conn_name = kstrdup(conn_name, GFP_KERNEL); + if (!n->conn_name) { + kfree(n); + n = NULL; + goto unlock; + } + } n->phys_addr = CEC_PHYS_ADDR_INVALID; + mutex_init(&n->lock); kref_init(&n->kref); list_add_tail(&n->head, &cec_notifiers); @@ -67,7 +76,7 @@ static void cec_notifier_release(struct kref *kref) container_of(kref, struct cec_notifier, kref); list_del(&n->head); - kfree(n->conn); + kfree(n->conn_name); kfree(n); } |