Re: [dpdk-stable] [PATCH v2 1/4] raw/ifpga/base: fix bug in IRQ functions

["Xu, Rosen" <rosen.xu@intel.com>]

Hi,

> -----Original Message-----
> From: Zhang, Tianfei <tianfei.zhang@intel.com>
> Sent: Monday, September 28, 2020 9:40
> To: dev@dpdk.org; Xu, Rosen <rosen.xu@intel.com>; Huang, Wei
> <wei.huang@intel.com>
> Cc: stable@dpdk.org; Zhang, Tianfei <tianfei.zhang@intel.com>
> Subject: [PATCH v2 1/4] raw/ifpga/base: fix bug in IRQ functions
> 
> From: Wei Huang <wei.huang@intel.com>
> 
> Using a pointer instead of using a structure and point to ifpga_irq_handle[] in
> register and unregister interrupt functions.
> Treat positive return value of ifpga_unregister_msix_irq() as successful.
> 
> Fixes: e0a1aafe ("raw/ifpga: introduce IRQ functions")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wei Huang <wei.huang@intel.com>
> Signed-off-by: Tianfei zhang <tianfei.zhang@intel.com>
> ---
> v2: fix typo in commit log
> ---
>  drivers/raw/ifpga/ifpga_rawdev.c | 41 ++++++++++++++++++--------------
>  1 file changed, 23 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/raw/ifpga/ifpga_rawdev.c
> b/drivers/raw/ifpga/ifpga_rawdev.c
> index a50173264..374a7ff1d 100644
> --- a/drivers/raw/ifpga/ifpga_rawdev.c
> +++ b/drivers/raw/ifpga/ifpga_rawdev.c
> @@ -1337,17 +1337,18 @@ int
>  ifpga_unregister_msix_irq(enum ifpga_irq_type type,
>  		int vec_start, rte_intr_callback_fn handler, void *arg)  {
> -	struct rte_intr_handle intr_handle;
> +	struct rte_intr_handle *intr_handle;
> 
>  	if (type == IFPGA_FME_IRQ)
> -		intr_handle = ifpga_irq_handle[0];
> +		intr_handle = &ifpga_irq_handle[0];
>  	else if (type == IFPGA_AFU_IRQ)
> -		intr_handle = ifpga_irq_handle[vec_start + 1];
> +		intr_handle = &ifpga_irq_handle[vec_start + 1];
> +	else
> +		return 0;
> 
> -	rte_intr_efd_disable(&intr_handle);
> +	rte_intr_efd_disable(intr_handle);
> 
> -	return rte_intr_callback_unregister(&intr_handle,
> -			handler, arg);
> +	return rte_intr_callback_unregister(intr_handle, handler, arg);
>  }
> 
>  int
> @@ -1357,7 +1358,7 @@ ifpga_register_msix_irq(struct rte_rawdev *dev,
> int port_id,
>  		void *arg)
>  {
>  	int ret;
> -	struct rte_intr_handle intr_handle;
> +	struct rte_intr_handle *intr_handle;
>  	struct opae_adapter *adapter;
>  	struct opae_manager *mgr;
>  	struct opae_accelerator *acc;
> @@ -1371,26 +1372,29 @@ ifpga_register_msix_irq(struct rte_rawdev *dev,
> int port_id,
>  		return -ENODEV;
> 
>  	if (type == IFPGA_FME_IRQ) {
> -		intr_handle = ifpga_irq_handle[0];
> +		intr_handle = &ifpga_irq_handle[0];
>  		count = 1;
> -	} else if (type == IFPGA_AFU_IRQ)
> -		intr_handle = ifpga_irq_handle[vec_start + 1];
> +	} else if (type == IFPGA_AFU_IRQ) {
> +		intr_handle = &ifpga_irq_handle[vec_start + 1];
> +	} else {
> +		return -EINVAL;
> +	}
> 
> -	intr_handle.type = RTE_INTR_HANDLE_VFIO_MSIX;
> +	intr_handle->type = RTE_INTR_HANDLE_VFIO_MSIX;
> 
> -	ret = rte_intr_efd_enable(&intr_handle, count);
> +	ret = rte_intr_efd_enable(intr_handle, count);
>  	if (ret)
>  		return -ENODEV;
> 
> -	intr_handle.fd = intr_handle.efds[0];
> +	intr_handle->fd = intr_handle->efds[0];
> 
>  	IFPGA_RAWDEV_PMD_DEBUG("register %s irq, vfio_fd=%d,
> fd=%d\n",
> -			name, intr_handle.vfio_dev_fd,
> -			intr_handle.fd);
> +			name, intr_handle->vfio_dev_fd,
> +			intr_handle->fd);
> 
>  	if (type == IFPGA_FME_IRQ) {
>  		struct fpga_fme_err_irq_set err_irq_set;
> -		err_irq_set.evtfd = intr_handle.efds[0];
> +		err_irq_set.evtfd = intr_handle->efds[0];
> 
>  		ret = opae_manager_ifpga_set_err_irq(mgr, &err_irq_set);
>  		if (ret)
> @@ -1400,13 +1404,14 @@ ifpga_register_msix_irq(struct rte_rawdev *dev,
> int port_id,
>  		if (!acc)
>  			return -EINVAL;
> 
> -		ret = opae_acc_set_irq(acc, vec_start, count,
> intr_handle.efds);
> +		ret = opae_acc_set_irq(acc, vec_start, count,
> +				intr_handle->efds);
>  		if (ret)
>  			return -EINVAL;
>  	}
> 
>  	/* register interrupt handler using DPDK API */
> -	ret = rte_intr_callback_register(&intr_handle,
> +	ret = rte_intr_callback_register(intr_handle,
>  			handler, (void *)arg);
>  	if (ret)
>  		return -EINVAL;
> --
> 2.17.1

Acked-by: Rosen Xu <rosen.xu@intel.com>