diff mbox series

[v2,1/1] powerpc: fix a memory leak

Message ID 20230915020559.3396566-1-ruc_gongyuanjun@163.com (mailing list archive)
State Changes Requested
Headers show
Series [v2,1/1] powerpc: fix a memory leak | expand

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Context Check Description
snowpatch_ozlabs/github-powerpc_ppctests success Successfully ran 8 jobs.
snowpatch_ozlabs/github-powerpc_selftests success Successfully ran 8 jobs.
snowpatch_ozlabs/github-powerpc_sparse fail sparse (ppc64le, ppc64le, fedora-37) failed at step Build.
snowpatch_ozlabs/github-powerpc_kernel_qemu fail kernel (ppc64_defconfig, korg-5.5.0) failed at step Build.
snowpatch_ozlabs/github-powerpc_clang fail 2 of 6 jobs failed.

Commit Message

Yuanjun Gong Sept. 15, 2023, 2:05 a.m. UTC 
When one of the methods xive_native_alloc_irq_on_chip, irq_create_mapping
or irq_get_handler_data fails, the function will directly return without
disposing vinst->name and vinst. Fix it.

Fixes: c20e1e299d93 ("powerpc/vas: Alloc and setup IRQ and trigger port address")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
---
 arch/powerpc/platforms/powernv/vas.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Comments

kernel test robot Sept. 24, 2023, 1:18 a.m. UTC | #1 
Hi Yuanjun,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.6-rc2 next-20230921]
[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/Yuanjun-Gong/powerpc-fix-a-memory-leak/20230915-100832
base:   linus/master
patch link:    https://lore.kernel.org/r/20230915020559.3396566-1-ruc_gongyuanjun%40163.com
patch subject: [PATCH v2 1/1] powerpc: fix a memory leak
config: powerpc-powernv_defconfig (https://download.01.org/0day-ci/archive/20230924/202309240954.1H3G2rpy-lkp@intel.com/config)
compiler: powerpc64le-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230924/202309240954.1H3G2rpy-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/202309240954.1H3G2rpy-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/powernv/vas.c: In function 'init_vas_instance':
>> arch/powerpc/platforms/powernv/vas.c:106:17: error: expected ';' before 'goto'
     106 |                 goto free_vinst;
         |                 ^~~~


vim +106 arch/powerpc/platforms/powernv/vas.c

0d17de03ce6a7a Haren Myneni        2020-04-15   49  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   50  static int init_vas_instance(struct platform_device *pdev)
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   51  {
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   52  	struct device_node *dn = pdev->dev.of_node;
c20e1e299d936c Haren Myneni        2020-04-15   53  	struct vas_instance *vinst;
c20e1e299d936c Haren Myneni        2020-04-15   54  	struct xive_irq_data *xd;
c20e1e299d936c Haren Myneni        2020-04-15   55  	uint32_t chipid, hwirq;
c20e1e299d936c Haren Myneni        2020-04-15   56  	struct resource *res;
c20e1e299d936c Haren Myneni        2020-04-15   57  	int rc, cpu, vasid;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   58  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   59  	rc = of_property_read_u32(dn, "ibm,vas-id", &vasid);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   60  	if (rc) {
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   61  		pr_err("No ibm,vas-id property for %s?\n", pdev->name);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   62  		return -ENODEV;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   63  	}
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   64  
c20e1e299d936c Haren Myneni        2020-04-15   65  	rc = of_property_read_u32(dn, "ibm,chip-id", &chipid);
c20e1e299d936c Haren Myneni        2020-04-15   66  	if (rc) {
c20e1e299d936c Haren Myneni        2020-04-15   67  		pr_err("No ibm,chip-id property for %s?\n", pdev->name);
c20e1e299d936c Haren Myneni        2020-04-15   68  		return -ENODEV;
c20e1e299d936c Haren Myneni        2020-04-15   69  	}
c20e1e299d936c Haren Myneni        2020-04-15   70  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   71  	if (pdev->num_resources != 4) {
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   72  		pr_err("Unexpected DT configuration for [%s, %d]\n",
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   73  				pdev->name, vasid);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   74  		return -ENODEV;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   75  	}
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   76  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   77  	vinst = kzalloc(sizeof(*vinst), GFP_KERNEL);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   78  	if (!vinst)
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   79  		return -ENOMEM;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   80  
9dd31b11370380 Cédric Le Goater    2020-12-12   81  	vinst->name = kasprintf(GFP_KERNEL, "vas-%d", vasid);
9dd31b11370380 Cédric Le Goater    2020-12-12   82  	if (!vinst->name) {
9dd31b11370380 Cédric Le Goater    2020-12-12   83  		kfree(vinst);
9dd31b11370380 Cédric Le Goater    2020-12-12   84  		return -ENOMEM;
9dd31b11370380 Cédric Le Goater    2020-12-12   85  	}
9dd31b11370380 Cédric Le Goater    2020-12-12   86  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   87  	INIT_LIST_HEAD(&vinst->node);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   88  	ida_init(&vinst->ida);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   89  	mutex_init(&vinst->mutex);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   90  	vinst->vas_id = vasid;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   91  	vinst->pdev = pdev;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   92  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   93  	res = &pdev->resource[0];
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   94  	vinst->hvwc_bar_start = res->start;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   95  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   96  	res = &pdev->resource[1];
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   97  	vinst->uwc_bar_start = res->start;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   98  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28   99  	res = &pdev->resource[2];
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  100  	vinst->paste_base_addr = res->start;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  101  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  102  	res = &pdev->resource[3];
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  103  	if (res->end > 62) {
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  104  		pr_err("Bad 'paste_win_id_shift' in DT, %llx\n", res->end);
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  105  		rc = -ENODEV
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28 @106  		goto free_vinst;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  107  	}
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  108  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  109  	vinst->paste_win_id_shift = 63 - res->end;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  110  
c20e1e299d936c Haren Myneni        2020-04-15  111  	hwirq = xive_native_alloc_irq_on_chip(chipid);
c20e1e299d936c Haren Myneni        2020-04-15  112  	if (!hwirq) {
c20e1e299d936c Haren Myneni        2020-04-15  113  		pr_err("Inst%d: Unable to allocate global irq for chip %d\n",
c20e1e299d936c Haren Myneni        2020-04-15  114  				vinst->vas_id, chipid);
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  115  		rc = -ENOENT;
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  116  		goto free_vinst;
c20e1e299d936c Haren Myneni        2020-04-15  117  	}
c20e1e299d936c Haren Myneni        2020-04-15  118  
c20e1e299d936c Haren Myneni        2020-04-15  119  	vinst->virq = irq_create_mapping(NULL, hwirq);
c20e1e299d936c Haren Myneni        2020-04-15  120  	if (!vinst->virq) {
c20e1e299d936c Haren Myneni        2020-04-15  121  		pr_err("Inst%d: Unable to map global irq %d\n",
c20e1e299d936c Haren Myneni        2020-04-15  122  				vinst->vas_id, hwirq);
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  123  		rc = -EINVAL;
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  124  		goto free_vinst;
c20e1e299d936c Haren Myneni        2020-04-15  125  	}
c20e1e299d936c Haren Myneni        2020-04-15  126  
c20e1e299d936c Haren Myneni        2020-04-15  127  	xd = irq_get_handler_data(vinst->virq);
c20e1e299d936c Haren Myneni        2020-04-15  128  	if (!xd) {
c20e1e299d936c Haren Myneni        2020-04-15  129  		pr_err("Inst%d: Invalid virq %d\n",
c20e1e299d936c Haren Myneni        2020-04-15  130  				vinst->vas_id, vinst->virq);
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  131  		rc = -EINVAL;
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  132  		goto free_vinst;
c20e1e299d936c Haren Myneni        2020-04-15  133  	}
c20e1e299d936c Haren Myneni        2020-04-15  134  
c20e1e299d936c Haren Myneni        2020-04-15  135  	vinst->irq_port = xd->trig_page;
c20e1e299d936c Haren Myneni        2020-04-15  136  	pr_devel("Initialized instance [%s, %d] paste_base 0x%llx paste_win_id_shift 0x%llx IRQ %d Port 0x%llx\n",
c20e1e299d936c Haren Myneni        2020-04-15  137  			pdev->name, vasid, vinst->paste_base_addr,
c20e1e299d936c Haren Myneni        2020-04-15  138  			vinst->paste_win_id_shift, vinst->virq,
c20e1e299d936c Haren Myneni        2020-04-15  139  			vinst->irq_port);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  140  
ca03258b6b338b Sukadev Bhattiprolu 2017-11-07  141  	for_each_possible_cpu(cpu) {
ca03258b6b338b Sukadev Bhattiprolu 2017-11-07  142  		if (cpu_to_chip_id(cpu) == of_get_ibm_chip_id(dn))
ca03258b6b338b Sukadev Bhattiprolu 2017-11-07  143  			per_cpu(cpu_vas_id, cpu) = vasid;
ca03258b6b338b Sukadev Bhattiprolu 2017-11-07  144  	}
ca03258b6b338b Sukadev Bhattiprolu 2017-11-07  145  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  146  	mutex_lock(&vas_mutex);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  147  	list_add(&vinst->node, &vas_instances);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  148  	mutex_unlock(&vas_mutex);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  149  
9774628acf8640 Haren Myneni        2020-04-15  150  	spin_lock_init(&vinst->fault_lock);
0d17de03ce6a7a Haren Myneni        2020-04-15  151  	/*
0d17de03ce6a7a Haren Myneni        2020-04-15  152  	 * IRQ and fault handling setup is needed only for user space
0d17de03ce6a7a Haren Myneni        2020-04-15  153  	 * send windows.
0d17de03ce6a7a Haren Myneni        2020-04-15  154  	 */
0d17de03ce6a7a Haren Myneni        2020-04-15  155  	if (vinst->virq) {
0d17de03ce6a7a Haren Myneni        2020-04-15  156  		rc = vas_irq_fault_window_setup(vinst);
0d17de03ce6a7a Haren Myneni        2020-04-15  157  		/*
0d17de03ce6a7a Haren Myneni        2020-04-15  158  		 * Fault window is used only for user space send windows.
0d17de03ce6a7a Haren Myneni        2020-04-15  159  		 * So if vinst->virq is NULL, tx_win_open returns -ENODEV
0d17de03ce6a7a Haren Myneni        2020-04-15  160  		 * for user space.
0d17de03ce6a7a Haren Myneni        2020-04-15  161  		 */
0d17de03ce6a7a Haren Myneni        2020-04-15  162  		if (rc)
0d17de03ce6a7a Haren Myneni        2020-04-15  163  			vinst->virq = 0;
0d17de03ce6a7a Haren Myneni        2020-04-15  164  	}
0d17de03ce6a7a Haren Myneni        2020-04-15  165  
ece4e51291485b Sukadev Bhattiprolu 2017-11-07  166  	vas_instance_init_dbgdir(vinst);
ece4e51291485b Sukadev Bhattiprolu 2017-11-07  167  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  168  	dev_set_drvdata(&pdev->dev, vinst);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  169  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  170  	return 0;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  171  
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  172  free_vinst:
9dd31b11370380 Cédric Le Goater    2020-12-12  173  	kfree(vinst->name);
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  174  	kfree(vinst);
1e5daa4a4c0658 Yuanjun Gong        2023-09-15  175  	return rc;
4dea2d1a927c61 Sukadev Bhattiprolu 2017-08-28  176
kernel test robot Nov. 8, 2023, 9:24 a.m. UTC | #2 
Hi Yuanjun,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.6 next-20231108]
[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/Yuanjun-Gong/powerpc-fix-a-memory-leak/20230915-100832
base:   linus/master
patch link:    https://lore.kernel.org/r/20230915020559.3396566-1-ruc_gongyuanjun%40163.com
patch subject: [PATCH v2 1/1] powerpc: fix a memory leak
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20231108/202311081645.j68Cla77-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231108/202311081645.j68Cla77-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/202311081645.j68Cla77-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/powerpc/platforms/powernv/vas.c:105:15: error: expected ';' after expression
     105 |                 rc = -ENODEV
         |                             ^
         |                             ;
   1 error generated.


vim +105 arch/powerpc/platforms/powernv/vas.c

    49	
    50	static int init_vas_instance(struct platform_device *pdev)
    51	{
    52		struct device_node *dn = pdev->dev.of_node;
    53		struct vas_instance *vinst;
    54		struct xive_irq_data *xd;
    55		uint32_t chipid, hwirq;
    56		struct resource *res;
    57		int rc, cpu, vasid;
    58	
    59		rc = of_property_read_u32(dn, "ibm,vas-id", &vasid);
    60		if (rc) {
    61			pr_err("No ibm,vas-id property for %s?\n", pdev->name);
    62			return -ENODEV;
    63		}
    64	
    65		rc = of_property_read_u32(dn, "ibm,chip-id", &chipid);
    66		if (rc) {
    67			pr_err("No ibm,chip-id property for %s?\n", pdev->name);
    68			return -ENODEV;
    69		}
    70	
    71		if (pdev->num_resources != 4) {
    72			pr_err("Unexpected DT configuration for [%s, %d]\n",
    73					pdev->name, vasid);
    74			return -ENODEV;
    75		}
    76	
    77		vinst = kzalloc(sizeof(*vinst), GFP_KERNEL);
    78		if (!vinst)
    79			return -ENOMEM;
    80	
    81		vinst->name = kasprintf(GFP_KERNEL, "vas-%d", vasid);
    82		if (!vinst->name) {
    83			kfree(vinst);
    84			return -ENOMEM;
    85		}
    86	
    87		INIT_LIST_HEAD(&vinst->node);
    88		ida_init(&vinst->ida);
    89		mutex_init(&vinst->mutex);
    90		vinst->vas_id = vasid;
    91		vinst->pdev = pdev;
    92	
    93		res = &pdev->resource[0];
    94		vinst->hvwc_bar_start = res->start;
    95	
    96		res = &pdev->resource[1];
    97		vinst->uwc_bar_start = res->start;
    98	
    99		res = &pdev->resource[2];
   100		vinst->paste_base_addr = res->start;
   101	
   102		res = &pdev->resource[3];
   103		if (res->end > 62) {
   104			pr_err("Bad 'paste_win_id_shift' in DT, %llx\n", res->end);
 > 105			rc = -ENODEV
   106			goto free_vinst;
   107		}
   108	
   109		vinst->paste_win_id_shift = 63 - res->end;
   110	
   111		hwirq = xive_native_alloc_irq_on_chip(chipid);
   112		if (!hwirq) {
   113			pr_err("Inst%d: Unable to allocate global irq for chip %d\n",
   114					vinst->vas_id, chipid);
   115			rc = -ENOENT;
   116			goto free_vinst;
   117		}
   118	
   119		vinst->virq = irq_create_mapping(NULL, hwirq);
   120		if (!vinst->virq) {
   121			pr_err("Inst%d: Unable to map global irq %d\n",
   122					vinst->vas_id, hwirq);
   123			rc = -EINVAL;
   124			goto free_vinst;
   125		}
   126	
   127		xd = irq_get_handler_data(vinst->virq);
   128		if (!xd) {
   129			pr_err("Inst%d: Invalid virq %d\n",
   130					vinst->vas_id, vinst->virq);
   131			rc = -EINVAL;
   132			goto free_vinst;
   133		}
   134	
   135		vinst->irq_port = xd->trig_page;
   136		pr_devel("Initialized instance [%s, %d] paste_base 0x%llx paste_win_id_shift 0x%llx IRQ %d Port 0x%llx\n",
   137				pdev->name, vasid, vinst->paste_base_addr,
   138				vinst->paste_win_id_shift, vinst->virq,
   139				vinst->irq_port);
   140	
   141		for_each_possible_cpu(cpu) {
   142			if (cpu_to_chip_id(cpu) == of_get_ibm_chip_id(dn))
   143				per_cpu(cpu_vas_id, cpu) = vasid;
   144		}
   145	
   146		mutex_lock(&vas_mutex);
   147		list_add(&vinst->node, &vas_instances);
   148		mutex_unlock(&vas_mutex);
   149	
   150		spin_lock_init(&vinst->fault_lock);
   151		/*
   152		 * IRQ and fault handling setup is needed only for user space
   153		 * send windows.
   154		 */
   155		if (vinst->virq) {
   156			rc = vas_irq_fault_window_setup(vinst);
   157			/*
   158			 * Fault window is used only for user space send windows.
   159			 * So if vinst->virq is NULL, tx_win_open returns -ENODEV
   160			 * for user space.
   161			 */
   162			if (rc)
   163				vinst->virq = 0;
   164		}
   165	
   166		vas_instance_init_dbgdir(vinst);
   167	
   168		dev_set_drvdata(&pdev->dev, vinst);
   169	
   170		return 0;
   171	
   172	free_vinst:
   173		kfree(vinst->name);
   174		kfree(vinst);
   175		return rc;
   176
diff mbox series

Patch

diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c
index b65256a63e87..40cb7a03d180 100644
--- a/arch/powerpc/platforms/powernv/vas.c
+++ b/arch/powerpc/platforms/powernv/vas.c
@@ -102,6 +102,7 @@  static int init_vas_instance(struct platform_device *pdev)
 	res = &pdev->resource[3];
 	if (res->end > 62) {
 		pr_err("Bad 'paste_win_id_shift' in DT, %llx\n", res->end);
+		rc = -ENODEV
 		goto free_vinst;
 	}
 
@@ -111,21 +112,24 @@  static int init_vas_instance(struct platform_device *pdev)
 	if (!hwirq) {
 		pr_err("Inst%d: Unable to allocate global irq for chip %d\n",
 				vinst->vas_id, chipid);
-		return -ENOENT;
+		rc = -ENOENT;
+		goto free_vinst;
 	}
 
 	vinst->virq = irq_create_mapping(NULL, hwirq);
 	if (!vinst->virq) {
 		pr_err("Inst%d: Unable to map global irq %d\n",
 				vinst->vas_id, hwirq);
-		return -EINVAL;
+		rc = -EINVAL;
+		goto free_vinst;
 	}
 
 	xd = irq_get_handler_data(vinst->virq);
 	if (!xd) {
 		pr_err("Inst%d: Invalid virq %d\n",
 				vinst->vas_id, vinst->virq);
-		return -EINVAL;
+		rc = -EINVAL;
+		goto free_vinst;
 	}
 
 	vinst->irq_port = xd->trig_page;
@@ -168,7 +172,7 @@  static int init_vas_instance(struct platform_device *pdev)
 free_vinst:
 	kfree(vinst->name);
 	kfree(vinst);
-	return -ENODEV;
+	return rc;
 
 }