rpmsg: qcom: glink: replace strncpy() with strscpy_pad()

commit 766279a8f85df32345dbda03b102ca1ee3d5ddea upstream.

The use of strncpy() is considered deprecated for NUL-terminated
strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
pad-behavior of strncpy, similarly to commit 08de420a8014 ("rpmsg:
glink: Replace strncpy() with strscpy_pad()").  This fixes W=1 warning:

  In function ‘qcom_glink_rx_close’,
    inlined from ‘qcom_glink_work’ at ../drivers/rpmsg/qcom_glink_native.c:1638:4:
  drivers/rpmsg/qcom_glink_native.c:1549:17: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   1549 |                 strncpy(chinfo.name, channel->name, sizeof(chinfo.name));

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Stephen Boyd <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andrew Chernyakov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/rpmsg/qcom_glink_native.c

@@ -1472,7 +1472,7 @@ static void qcom_glink_rx_close(struct qcom_glink *glink, unsigned int rcid)
  cancel_work_sync(&channel->intent_work);
 
  if (channel->rpdev) {
- strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
+ strscpy_pad(chinfo.name, channel->name, sizeof(chinfo.name));
  chinfo.src = RPMSG_ADDR_ANY;
  chinfo.dst = RPMSG_ADDR_ANY;
 

drivers/rpmsg/qcom_smd.c

@@ -1073,7 +1073,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel)
 
  /* Assign public information to the rpmsg_device */
  rpdev = &qsdev->rpdev;
- strncpy(rpdev->id.name, channel->name, RPMSG_NAME_SIZE);
+ strscpy_pad(rpdev->id.name, channel->name, RPMSG_NAME_SIZE);
  rpdev->src = RPMSG_ADDR_ANY;
  rpdev->dst = RPMSG_ADDR_ANY;
 
@@ -1304,7 +1304,7 @@ static void qcom_channel_state_worker(struct work_struct *work)
 
  spin_unlock_irqrestore(&edge->channels_lock, flags);
 
- strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
+ strscpy_pad(chinfo.name, channel->name, sizeof(chinfo.name));
  chinfo.src = RPMSG_ADDR_ANY;
  chinfo.dst = RPMSG_ADDR_ANY;
  rpmsg_unregister_device(&edge->dev, &chinfo);