[bug report] firmware: arm_ffa: Add schedule receiver callback mechanism

[Dan Carpenter]

Hello Sudeep Holla,

The patch 0184450b8b1e: "firmware: arm_ffa: Add schedule receiver
callback mechanism" from Oct 5, 2023 (linux-next), leads to the
following Smatch static checker warning:

	drivers/firmware/arm_ffa/driver.c:1251 ffa_partitions_cleanup()
	warn: double check that we're allocating correct size: 8 vs 88

drivers/firmware/arm_ffa/driver.c
    1243 static void ffa_partitions_cleanup(void)
    1244 {
    1245         struct ffa_dev_part_info **info;
    1246         int idx, count = drv_info->partition_count;
    1247 
    1248         if (!count)
    1249                 return;
    1250 
--> 1251         info = kcalloc(count, sizeof(**info), GFP_KERNEL);

I *think* this should be sizeof(*info).  It ends up being a smaller
allocation (8 bytes instead of 88).

    1252         if (!info)
    1253                 return;
    1254 
    1255         xa_extract(&drv_info->partition_info, (void **)info, 0, VM_ID_MASK,

We copy count pointers to info.  We don't copy entire structs.  It still
works but it's larger than necessary.

    1256                    count, XA_PRESENT);
    1257 
    1258         for (idx = 0; idx < count; idx++)
    1259                 kfree(info[idx]);
    1260         kfree(info);
    1261 
    1262         drv_info->partition_count = 0;
    1263         xa_destroy(&drv_info->partition_info);
    1264 }

regards,
dan carpenter