[PATCH v2 0/2] rpmsg: glink: smem: robustness and debuggability fixes

[Chunkai Deng]

This series makes two small improvements to the SMEM GLINK transport:

1. Add WARN_ON_ONCE checks in the FIFO read/write helpers to catch
   and report broken index invariants early, rather than proceeding
   with an out-of-bounds offset into the FIFO.

2. Pass dev_name(&smem->dev) as the IRQ name instead of the static
   string "glink-smem".  On platforms with multiple remoteprocs each
   SMEM GLINK instance registers its own IRQ, and the unique device
   name makes each entry in /proc/interrupts identifiable without
   adding a new struct field.

Signed-off-by: Chunkai Deng <chunkai.deng@xxxxxxxxxxxxxxxx>
---
Changes in v2:
- Drop the modulo patch ("rpmsg: glink: smem: Use modulo for FIFO
  tail wrap-around in rx_advance"); per review, it papers over an
  unreachable scenario without restoring a valid protocol state.
  Proper RX-side validation of chunk_size against rx_pipe->length
  will be sent as a separate patch.
- "rpmsg: glink: smem: Add WARN_ON_ONCE for FIFO index invariants":
  - Drop the trailing comma after "skipped" in the commit message
    body (per review).
  - Add Fixes: caf989c350e8 ("rpmsg: glink: Introduce glink smem
    based transport") and Cc: stable@xxxxxxxxxxxxxxx (per review).
- Carry Dmitry's Reviewed-by on "rpmsg: glink: smem: Use device
  name as IRQ name" (no code changes since v1).
- Link to v1: https://patch.msgid.link/20260603-rpmsg-improvements-v1-0-dcfc22ed69f7@xxxxxxxxxxxxxxxx

---
Chunkai Deng (2):
      rpmsg: glink: smem: Use device name as IRQ name
      rpmsg: glink: smem: Add WARN_ON_ONCE for FIFO index invariants

 drivers/rpmsg/qcom_glink_smem.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)
---
base-commit: f7af91adc230aa99e23330ecf85bc9badd9780ad
change-id: 20260601-rpmsg-improvements-643a6e133f66

Best regards,
--  
Chunkai Deng <chunkai.deng@xxxxxxxxxxxxxxxx>