If we receive signal when waiting for IPC message response in
ivpu_ipc_receive() we return error and continue to operate.
Then the driver can send another IPC messages and re-use occupied
slot of the message still processed by the firmware. This can result
in corrupting firmware memory and following FW crash with messages:
[ 3698.569719] intel_vpu 0000:00:0b.0: [drm] ivpu_ipc_send_receive_internal():
IPC receive failed: type 0x1103, ret -512
[ 3698.569747] intel_vpu 0000:00:0b.0: [drm] ivpu_jsm_unregister_db(): Failed
to unregister doorbell 3: -512
[ 3698.569756] intel_vpu 0000:00:0b.0: [drm] ivpu_ipc_tx_prepare(): IPC message
vpu:0x88980000 not released by firmware
[ 3698.569763] intel_vpu 0000:00:0b.0: [drm] ivpu_ipc_tx_prepare(): JSM message
vpu:0x88980040 not released by firmware
[ 3698.570234] intel_vpu 0000:00:0b.0: [drm] ivpu_ipc_send_receive_internal():
IPC receive failed: type 0x110e, ret -512
[ 3698.570318] intel_vpu 0000:00:0b.0: [drm] *ERROR* ivpu_mmu_dump_event(): MMU
EVTQ: 0x10 (Translation fault) SSID: 0 SID: 3, e[2] 00000000, e[3] 00000208, in
addr: 0x88988000, fetch addr: 0x0
To fix the issue don't use interruptible variant of wait event to
allow firmware to finish IPC processing.
Fixes: 5d7422cfb498 ("accel/ivpu: Add IPC driver and JSM messages")
Reviewed-by: Karol Wachowski <karol.wachow...@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.grus...@linux.intel.com>
---
drivers/accel/ivpu/ivpu_ipc.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/accel/ivpu/ivpu_ipc.c b/drivers/accel/ivpu/ivpu_ipc.c
index fa0af59e39ab..295c0d7b5039 100644
--- a/drivers/accel/ivpu/ivpu_ipc.c
+++ b/drivers/accel/ivpu/ivpu_ipc.c
@@ -209,10 +209,10 @@ int ivpu_ipc_receive(struct ivpu_device *vdev, struct
ivpu_ipc_consumer *cons,
struct ivpu_ipc_rx_msg *rx_msg;
int wait_ret, ret = 0;
- wait_ret = wait_event_interruptible_timeout(cons->rx_msg_wq,
- (IS_KTHREAD() &&
kthread_should_stop()) ||
-
!list_empty(&cons->rx_msg_list),
-
msecs_to_jiffies(timeout_ms));
+ wait_ret = wait_event_timeout(cons->rx_msg_wq,
+ (IS_KTHREAD() && kthread_should_stop()) ||
+ !list_empty(&cons->rx_msg_list),
+ msecs_to_jiffies(timeout_ms));
if (IS_KTHREAD() && kthread_should_stop())
return -EINTR;
@@ -220,9 +220,6 @@ int ivpu_ipc_receive(struct ivpu_device *vdev, struct
ivpu_ipc_consumer *cons,
if (wait_ret == 0)
return -ETIMEDOUT;
- if (wait_ret < 0)
- return -ERESTARTSYS;
-
spin_lock_irq(&cons->rx_msg_lock);
rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct
ivpu_ipc_rx_msg, link);
if (!rx_msg) {
--
2.25.1
