[Intel-gfx] [PATCH v2] drm/i915: Mark i915.inject_load_failure as being hit

[kbuild test robot]

Hi Chris,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on v4.17 next-20180607]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Chris-Wilson/drm-i915-Mark-i915-inject_load_failure-as-being-hit/20180607-174849
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/i915/i915_drv.c:61:36: sparse: incorrect type in initializer (different base types) @@    expected int static [signed] [toplevel] i915_load_error_level @@    got evel] i915_load_error_level @@
   drivers/gpu/drm/i915/i915_drv.c:61:36:    expected int static [signed] [toplevel] i915_load_error_level
   drivers/gpu/drm/i915/i915_drv.c:61:36:    got char *<noident>
>> drivers/gpu/drm/i915/i915_drv.c:72:39: sparse: incorrect type in assignment (different base types) @@    expected int static [signed] [toplevel] i915_load_error_level @@    got evel] i915_load_error_level @@
   drivers/gpu/drm/i915/i915_drv.c:72:39:    expected int static [signed] [toplevel] i915_load_error_level
   drivers/gpu/drm/i915/i915_drv.c:72:39:    got char *<noident>
>> drivers/gpu/drm/i915/i915_drv.c:1425:9: sparse: incorrect type in argument 2 (different base types) @@    expected char const *level @@    got int static [signed]char const *level @@
   drivers/gpu/drm/i915/i915_drv.c:1425:9:    expected char const *level
   drivers/gpu/drm/i915/i915_drv.c:1425:9:    got int static [signed] [toplevel] i915_load_error_level
   In file included from include/linux/printk.h:7:0,
                    from include/linux/kernel.h:14,
                    from include/linux/list.h:9,
                    from include/linux/resource_ext.h:17,
                    from include/linux/acpi.h:26,
                    from drivers/gpu/drm/i915/i915_drv.c:30:
   include/linux/kern_levels.h:5:18: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
    #define KERN_SOH "001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   drivers/gpu/drm/i915/i915_drv.c:61:36: note: in expansion of macro 'KERN_ERR'
    static int i915_load_error_level = KERN_ERR;
                                       ^~~~~~~~
   include/linux/kern_levels.h:5:18: error: initializer element is not computable at load time
    #define KERN_SOH "001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   drivers/gpu/drm/i915/i915_drv.c:61:36: note: in expansion of macro 'KERN_ERR'
    static int i915_load_error_level = KERN_ERR;
                                       ^~~~~~~~
   drivers/gpu/drm/i915/i915_drv.c: In function '__i915_inject_load_failure':
   drivers/gpu/drm/i915/i915_drv.c:72:25: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
      i915_load_error_level = KERN_DEBUG;
                            ^
   drivers/gpu/drm/i915/i915_drv.c: In function 'i915_driver_load':
   drivers/gpu/drm/i915/i915_drv.c:123:26: warning: passing argument 2 of '__i915_printk' makes pointer from integer without a cast [-Wint-conversion]
     __i915_printk(dev_priv, i915_load_error_level, fmt, ##__VA_ARGS__)
                             ^
   drivers/gpu/drm/i915/i915_drv.c:1425:2: note: in expansion of macro 'i915_load_error'
     i915_load_error(dev_priv, "Device initialization failed (%d)n", ret);
     ^~~~~~~~~~~~~~~
   drivers/gpu/drm/i915/i915_drv.c:87:1: note: expected 'const char *' but argument is of type 'int'
    __i915_printk(struct drm_i915_private *dev_priv, const char *level,
    ^~~~~~~~~~~~~

vim +61 drivers/gpu/drm/i915/i915_drv.c

    58	
    59	#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
    60	static unsigned int i915_load_fail_count;
  > 61	static int i915_load_error_level = KERN_ERR;
    62	
    63	bool __i915_inject_load_failure(const char *func, int line)
    64	{
    65		if (i915_load_fail_count >= i915_modparams.inject_load_failure)
    66			return false;
    67	
    68		if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
    69			DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
    70				 i915_modparams.inject_load_failure, func, line);
    71			i915_modparams.inject_load_failure = 0;
  > 72			i915_load_error_level = KERN_DEBUG;
    73			return true;
    74		}
    75	
    76		return false;
    77	}
    78	#else
    79	#define i915_load_error_level KERN_ERR
    80	#endif
    81	

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