Re: [PATCH] rpmsg_ns: Work around TI non-standard message

[kernel test robot <lkp@intel.com>]

Hi Richard,

kernel test robot noticed the following build warnings:

[auto build test WARNING on remoteproc/rpmsg-next]
[also build test WARNING on linus/master v6.12-rc2 next-20241011]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Richard-Weinberger/rpmsg_ns-Work-around-TI-non-standard-message/20241011-204122
base:   https://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git rpmsg-next
patch link:    https://lore.kernel.org/r/20241011123922.23135-1-richard%40nod.at
patch subject: [PATCH] rpmsg_ns: Work around TI non-standard message
config: x86_64-randconfig-121-20241012 (https://download.01.org/0day-ci/archive/20241012/202410122348.irTWFe4S-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241012/202410122348.irTWFe4S-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410122348.irTWFe4S-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/rpmsg/rpmsg_ns.c:55:25: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __rpmsg32 [assigned] [usertype] ns_addr @@     got unsigned int [usertype] addr @@
   drivers/rpmsg/rpmsg_ns.c:55:25: sparse:     expected restricted __rpmsg32 [assigned] [usertype] ns_addr
   drivers/rpmsg/rpmsg_ns.c:55:25: sparse:     got unsigned int [usertype] addr
>> drivers/rpmsg/rpmsg_ns.c:56:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __rpmsg32 [assigned] [usertype] ns_flags @@     got unsigned int [usertype] flags @@
   drivers/rpmsg/rpmsg_ns.c:56:26: sparse:     expected restricted __rpmsg32 [assigned] [usertype] ns_flags
   drivers/rpmsg/rpmsg_ns.c:56:26: sparse:     got unsigned int [usertype] flags

vim +55 drivers/rpmsg/rpmsg_ns.c

    45	
    46		if (len == sizeof(struct rpmsg_ns_msg)) {
    47			struct rpmsg_ns_msg *msg = data;
    48	
    49			ns_addr = msg->addr;
    50			ns_flags = msg->flags;
    51			ns_name = msg->name;
    52		} else if (len == sizeof(struct __rpmsg_ns_msg_ti)) {
    53			struct __rpmsg_ns_msg_ti *msg = data;
    54	
  > 55			ns_addr = msg->addr;
  > 56			ns_flags = msg->flags;
    57			ns_name = msg->name;
    58			dev_warn(dev, "non-standard ns msg found\n");
    59		} else {
    60			dev_err(dev, "malformed ns msg (%d)\n", len);
    61			return -EINVAL;
    62		}
    63	
    64		/* don't trust the remote processor for null terminating the name */
    65		ns_name[RPMSG_NAME_SIZE - 1] = '\0';
    66	
    67		strscpy_pad(chinfo.name, ns_name, sizeof(chinfo.name));
    68		chinfo.src = RPMSG_ADDR_ANY;
    69		chinfo.dst = rpmsg32_to_cpu(rpdev, ns_addr);
    70	
    71		dev_info(dev, "%sing channel %s addr 0x%x\n",
    72			 rpmsg32_to_cpu(rpdev, ns_flags) & RPMSG_NS_DESTROY ?
    73			 "destroy" : "creat", ns_name, chinfo.dst);
    74	
    75		if (rpmsg32_to_cpu(rpdev, ns_flags) & RPMSG_NS_DESTROY) {
    76			ret = rpmsg_release_channel(rpdev, &chinfo);
    77			if (ret)
    78				dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
    79		} else {
    80			newch = rpmsg_create_channel(rpdev, &chinfo);
    81			if (!newch)
    82				dev_err(dev, "rpmsg_create_channel failed\n");
    83		}
    84	
    85		return 0;
    86	}
    87	

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