[PATCH v4] raw/ntb: clear all valid DB bits when DB init

[Wu, Jingjing]

> -----Original Message-----
> From: Guo, Junfeng <junfeng.guo at intel.com>
> Sent: Thursday, February 10, 2022 3:07 PM
> To: Wu, Jingjing <jingjing.wu at intel.com>
> Cc: dev at dpdk.org; stable at dpdk.org; Guo, Junfeng <junfeng.guo at intel.com>
> Subject: [PATCH v4] raw/ntb: clear all valid DB bits when DB init
> 
> Before registering the doorbell interrupt handler callback function,
> all the valid doorbell bits within the NTB private data struct should
> be cleared to avoid the confusion of the handshake timing sequence
> diagram when setting up the NTB connection in back-to-back mode.
> 
> Fixes: 62012a76811e ("raw/ntb: add handshake process")
> Cc: stable at dpdk.org
> 
> v2: fix typo
> v3: fix coding style issue
> v4: add ops check before calling it
> 
> Signed-off-by: Junfeng Guo <junfeng.guo at intel.com>
Acked-by: Jingjing Wu <jingjing.wu at intel.com>