linux-kernel - Re: [PATCH] bus/mhi: Switch trace_mhi_gen

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Message-ID: <20241006181158.s6g6h2lwn6vxgv2o@thinkpad>
Date: Sun, 6 Oct 2024 23:41:58 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Carl Vanderlip <quic_carlv@...cinc.com>
Cc: kernel test robot <lkp@...el.com>,
	Jeffrey Hugo <quic_jhugo@...cinc.com>, mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bus/mhi: Switch trace_mhi_gen_tre fields to native endian

On Fri, Oct 04, 2024 at 10:03:20AM -0700, Carl Vanderlip wrote:
> Each of the __field() macros were triggering sparse warnings similar to:
> trace.h:87:1: sparse: sparse: cast to restricted __le64
> trace.h:87:1: sparse: sparse: restricted __le64 degrades to integer
> trace.h:87:1: sparse: sparse: restricted __le64 degrades to integer
> 
> Change each little endian type to its similarly sized native integer.
> Convert inputs into native endian.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202402071859.8qMhgJEQ-lkp@intel.com/
> Signed-off-by: Carl Vanderlip <quic_carlv@...cinc.com>

Applied to mhi-next!

- Mani

> Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
> ---
>  drivers/bus/mhi/host/trace.h | 25 +++++++++++++------------
>  1 file changed, 13 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/bus/mhi/host/trace.h b/drivers/bus/mhi/host/trace.h
> index 95613c8ebe06..3e0c41777429 100644
> --- a/drivers/bus/mhi/host/trace.h
> +++ b/drivers/bus/mhi/host/trace.h
> @@ -9,6 +9,7 @@
>  #if !defined(_TRACE_EVENT_MHI_HOST_H) || defined(TRACE_HEADER_MULTI_READ)
>  #define _TRACE_EVENT_MHI_HOST_H
>  
> +#include <linux/byteorder/generic.h>
>  #include <linux/tracepoint.h>
>  #include <linux/trace_seq.h>
>  #include "../common.h"
> @@ -97,18 +98,18 @@ TRACE_EVENT(mhi_gen_tre,
>  		__string(name, mhi_cntrl->mhi_dev->name)
>  		__field(int, ch_num)
>  		__field(void *, wp)
> -		__field(__le64, tre_ptr)
> -		__field(__le32, dword0)
> -		__field(__le32, dword1)
> +		__field(uint64_t, tre_ptr)
> +		__field(uint32_t, dword0)
> +		__field(uint32_t, dword1)
>  	),
>  
>  	TP_fast_assign(
>  		__assign_str(name);
>  		__entry->ch_num = mhi_chan->chan;
>  		__entry->wp = mhi_tre;
> -		__entry->tre_ptr = mhi_tre->ptr;
> -		__entry->dword0 = mhi_tre->dword[0];
> -		__entry->dword1 = mhi_tre->dword[1];
> +		__entry->tre_ptr = le64_to_cpu(mhi_tre->ptr);
> +		__entry->dword0 = le32_to_cpu(mhi_tre->dword[0]);
> +		__entry->dword1 = le32_to_cpu(mhi_tre->dword[1]);
>  	),
>  
>  	TP_printk("%s: Chan: %d TRE: 0x%p TRE buf: 0x%llx DWORD0: 0x%08x DWORD1: 0x%08x\n",
> @@ -176,19 +177,19 @@ DECLARE_EVENT_CLASS(mhi_process_event_ring,
>  
>  	TP_STRUCT__entry(
>  		__string(name, mhi_cntrl->mhi_dev->name)
> -		__field(__le32, dword0)
> -		__field(__le32, dword1)
> +		__field(uint32_t, dword0)
> +		__field(uint32_t, dword1)
>  		__field(int, state)
> -		__field(__le64, ptr)
> +		__field(uint64_t, ptr)
>  		__field(void *, rp)
>  	),
>  
>  	TP_fast_assign(
>  		__assign_str(name);
>  		__entry->rp = rp;
> -		__entry->ptr = rp->ptr;
> -		__entry->dword0 = rp->dword[0];
> -		__entry->dword1 = rp->dword[1];
> +		__entry->ptr = le64_to_cpu(rp->ptr);
> +		__entry->dword0 = le32_to_cpu(rp->dword[0]);
> +		__entry->dword1 = le32_to_cpu(rp->dword[1]);
>  		__entry->state = MHI_TRE_GET_EV_STATE(rp);
>  	),
>  
> -- 
> 2.25.1
> 

-- 
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