[PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error

[PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error

[Haotian Zhang]

The probe functions for the mt6765 apmixed, top, and infrasys clocks
use mtk_alloc_clk_data() to allocate memory. This requires manual
freeing of the memory in all error handling paths and in the driver's
remove function.

Switch to mtk_devm_alloc_clk_data() in order to fix the memory leak in the
probe function.

Fixes: 1aca9939bf72 ("clk: mediatek: Add MT6765 clock support")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
---
 drivers/clk/mediatek/clk-mt6765.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/mediatek/clk-mt6765.c b/drivers/clk/mediatek/clk-mt6765.c
index d53731e7933f..5cfb9a3a5ee3 100644
--- a/drivers/clk/mediatek/clk-mt6765.c
+++ b/drivers/clk/mediatek/clk-mt6765.c
@@ -736,7 +736,7 @@ static int clk_mt6765_apmixed_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
+	clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
 	if (!clk_data)
 		return -ENOMEM;
 
@@ -770,7 +770,7 @@ static int clk_mt6765_top_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
+	clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
 	if (!clk_data)
 		return -ENOMEM;
 
@@ -810,7 +810,7 @@ static int clk_mt6765_ifr_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	clk_data = mtk_alloc_clk_data(CLK_IFR_NR_CLK);
+	clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
 	if (!clk_data)
 		return -ENOMEM;
 
-- 
2.50.1.windows.1

Re: [PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error

[kernel test robot]

Hi Haotian,

kernel test robot noticed the following build errors:

[auto build test ERROR on clk/clk-next]
[also build test ERROR on linus/master v6.17 next-20250926]
[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/Haotian-Zhang/clk-mediatek-Use-devm_alloc-for-clk_data-allocation-to-fix-memory-leak-on-probe-error/20250929-103835
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
patch link:    https://lore.kernel.org/r/20250929023621.1968-1-vulab%40iscas.ac.cn
patch subject: [PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error
config: i386-buildonly-randconfig-001-20250929 (https://download.01.org/0day-ci/archive/20250929/202509291432.RfHOsLVY-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250929/202509291432.RfHOsLVY-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/202509291432.RfHOsLVY-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/clk/mediatek/clk-mt6765.c:20:
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_apmixed_probe':
>> include/dt-bindings/clock/mt6765-clk.h:32:41: error: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
      32 | #define CLK_APMIXED_NR_CLK              22
         |                                         ^~
         |                                         |
         |                                         int
   drivers/clk/mediatek/clk-mt6765.c:739:44: note: in expansion of macro 'CLK_APMIXED_NR_CLK'
     739 |         clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
         |                                            ^~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:68: note: expected 'struct device *' but argument is of type 'int'
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                                                     ~~~~~~~~~~~~~~~^~~
>> drivers/clk/mediatek/clk-mt6765.c:739:20: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     739 |         clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
         |                    ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_top_probe':
   include/dt-bindings/clock/mt6765-clk.h:161:41: error: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
     161 | #define CLK_TOP_NR_CLK                  126
         |                                         ^~~
         |                                         |
         |                                         int
   drivers/clk/mediatek/clk-mt6765.c:773:44: note: in expansion of macro 'CLK_TOP_NR_CLK'
     773 |         clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
         |                                            ^~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mtk.h:234:68: note: expected 'struct device *' but argument is of type 'int'
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                                                     ~~~~~~~~~~~~~~~^~~
   drivers/clk/mediatek/clk-mt6765.c:773:20: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     773 |         clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
         |                    ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_ifr_probe':
   include/dt-bindings/clock/mt6765-clk.h:228:41: error: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
     228 | #define CLK_IFR_NR_CLK                  64
         |                                         ^~
         |                                         |
         |                                         int
   drivers/clk/mediatek/clk-mt6765.c:813:44: note: in expansion of macro 'CLK_IFR_NR_CLK'
     813 |         clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
         |                                            ^~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mtk.h:234:68: note: expected 'struct device *' but argument is of type 'int'
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                                                     ~~~~~~~~~~~~~~~^~~
   drivers/clk/mediatek/clk-mt6765.c:813:20: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     813 |         clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
         |                    ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
     234 | struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
         |                             ^~~~~~~~~~~~~~~~~~~~~~~


vim +/mtk_devm_alloc_clk_data +32 include/dt-bindings/clock/mt6765-clk.h

eb7beb65ac30af Mars Cheng 2020-02-21   8  
eb7beb65ac30af Mars Cheng 2020-02-21   9  /* APMIXEDSYS */
eb7beb65ac30af Mars Cheng 2020-02-21  10  #define CLK_APMIXED_ARMPLL_L		0
eb7beb65ac30af Mars Cheng 2020-02-21  11  #define CLK_APMIXED_ARMPLL		1
eb7beb65ac30af Mars Cheng 2020-02-21  12  #define CLK_APMIXED_CCIPLL		2
eb7beb65ac30af Mars Cheng 2020-02-21  13  #define CLK_APMIXED_MAINPLL		3
eb7beb65ac30af Mars Cheng 2020-02-21  14  #define CLK_APMIXED_MFGPLL		4
eb7beb65ac30af Mars Cheng 2020-02-21  15  #define CLK_APMIXED_MMPLL		5
eb7beb65ac30af Mars Cheng 2020-02-21  16  #define CLK_APMIXED_UNIV2PLL		6
eb7beb65ac30af Mars Cheng 2020-02-21  17  #define CLK_APMIXED_MSDCPLL		7
eb7beb65ac30af Mars Cheng 2020-02-21  18  #define CLK_APMIXED_APLL1		8
eb7beb65ac30af Mars Cheng 2020-02-21  19  #define CLK_APMIXED_MPLL		9
eb7beb65ac30af Mars Cheng 2020-02-21  20  #define CLK_APMIXED_ULPOSC1		10
eb7beb65ac30af Mars Cheng 2020-02-21  21  #define CLK_APMIXED_ULPOSC2		11
eb7beb65ac30af Mars Cheng 2020-02-21  22  #define CLK_APMIXED_SSUSB26M		12
eb7beb65ac30af Mars Cheng 2020-02-21  23  #define CLK_APMIXED_APPLL26M		13
eb7beb65ac30af Mars Cheng 2020-02-21  24  #define CLK_APMIXED_MIPIC0_26M		14
eb7beb65ac30af Mars Cheng 2020-02-21  25  #define CLK_APMIXED_MDPLLGP26M		15
eb7beb65ac30af Mars Cheng 2020-02-21  26  #define CLK_APMIXED_MMSYS_F26M		16
eb7beb65ac30af Mars Cheng 2020-02-21  27  #define CLK_APMIXED_UFS26M		17
eb7beb65ac30af Mars Cheng 2020-02-21  28  #define CLK_APMIXED_MIPIC1_26M		18
eb7beb65ac30af Mars Cheng 2020-02-21  29  #define CLK_APMIXED_MEMPLL26M		19
eb7beb65ac30af Mars Cheng 2020-02-21  30  #define CLK_APMIXED_CLKSQ_LVPLL_26M	20
eb7beb65ac30af Mars Cheng 2020-02-21  31  #define CLK_APMIXED_MIPID0_26M		21
eb7beb65ac30af Mars Cheng 2020-02-21 @32  #define CLK_APMIXED_NR_CLK		22
eb7beb65ac30af Mars Cheng 2020-02-21  33  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error

[kernel test robot]

Hi Haotian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on clk/clk-next]
[also build test WARNING on linus/master v6.17 next-20250926]
[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/Haotian-Zhang/clk-mediatek-Use-devm_alloc-for-clk_data-allocation-to-fix-memory-leak-on-probe-error/20250929-103835
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
patch link:    https://lore.kernel.org/r/20250929023621.1968-1-vulab%40iscas.ac.cn
patch subject: [PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error
config: arc-randconfig-002-20250929 (https://download.01.org/0day-ci/archive/20250929/202509291736.rboPY1Uj-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250929/202509291736.rboPY1Uj-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/202509291736.rboPY1Uj-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/clk/mediatek/clk-mt6765.c:20:
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_apmixed_probe':
>> include/dt-bindings/clock/mt6765-clk.h:32:29: warning: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
    #define CLK_APMIXED_NR_CLK  22
                                ^~
   drivers/clk/mediatek/clk-mt6765.c:739:37: note: in expansion of macro 'CLK_APMIXED_NR_CLK'
     clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
                                        ^~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: expected 'struct device *' but argument is of type 'int'
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mt6765.c:739:13: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
                ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:20:
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_top_probe':
   include/dt-bindings/clock/mt6765-clk.h:161:26: warning: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
    #define CLK_TOP_NR_CLK   126
                             ^~~
   drivers/clk/mediatek/clk-mt6765.c:773:37: note: in expansion of macro 'CLK_TOP_NR_CLK'
     clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
                                        ^~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: expected 'struct device *' but argument is of type 'int'
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mt6765.c:773:13: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
                ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:20:
   drivers/clk/mediatek/clk-mt6765.c: In function 'clk_mt6765_ifr_probe':
   include/dt-bindings/clock/mt6765-clk.h:228:26: warning: passing argument 1 of 'mtk_devm_alloc_clk_data' makes pointer from integer without a cast [-Wint-conversion]
    #define CLK_IFR_NR_CLK   64
                             ^~
   drivers/clk/mediatek/clk-mt6765.c:813:37: note: in expansion of macro 'CLK_IFR_NR_CLK'
     clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
                                        ^~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: expected 'struct device *' but argument is of type 'int'
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/clk/mediatek/clk-mt6765.c:813:13: error: too few arguments to function 'mtk_devm_alloc_clk_data'
     clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
                ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/clk/mediatek/clk-mt6765.c:16:
   drivers/clk/mediatek/clk-mtk.h:234:29: note: declared here
    struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
                                ^~~~~~~~~~~~~~~~~~~~~~~


vim +/mtk_devm_alloc_clk_data +32 include/dt-bindings/clock/mt6765-clk.h

eb7beb65ac30afb Mars Cheng 2020-02-21   8  
eb7beb65ac30afb Mars Cheng 2020-02-21   9  /* APMIXEDSYS */
eb7beb65ac30afb Mars Cheng 2020-02-21  10  #define CLK_APMIXED_ARMPLL_L		0
eb7beb65ac30afb Mars Cheng 2020-02-21  11  #define CLK_APMIXED_ARMPLL		1
eb7beb65ac30afb Mars Cheng 2020-02-21  12  #define CLK_APMIXED_CCIPLL		2
eb7beb65ac30afb Mars Cheng 2020-02-21  13  #define CLK_APMIXED_MAINPLL		3
eb7beb65ac30afb Mars Cheng 2020-02-21  14  #define CLK_APMIXED_MFGPLL		4
eb7beb65ac30afb Mars Cheng 2020-02-21  15  #define CLK_APMIXED_MMPLL		5
eb7beb65ac30afb Mars Cheng 2020-02-21  16  #define CLK_APMIXED_UNIV2PLL		6
eb7beb65ac30afb Mars Cheng 2020-02-21  17  #define CLK_APMIXED_MSDCPLL		7
eb7beb65ac30afb Mars Cheng 2020-02-21  18  #define CLK_APMIXED_APLL1		8
eb7beb65ac30afb Mars Cheng 2020-02-21  19  #define CLK_APMIXED_MPLL		9
eb7beb65ac30afb Mars Cheng 2020-02-21  20  #define CLK_APMIXED_ULPOSC1		10
eb7beb65ac30afb Mars Cheng 2020-02-21  21  #define CLK_APMIXED_ULPOSC2		11
eb7beb65ac30afb Mars Cheng 2020-02-21  22  #define CLK_APMIXED_SSUSB26M		12
eb7beb65ac30afb Mars Cheng 2020-02-21  23  #define CLK_APMIXED_APPLL26M		13
eb7beb65ac30afb Mars Cheng 2020-02-21  24  #define CLK_APMIXED_MIPIC0_26M		14
eb7beb65ac30afb Mars Cheng 2020-02-21  25  #define CLK_APMIXED_MDPLLGP26M		15
eb7beb65ac30afb Mars Cheng 2020-02-21  26  #define CLK_APMIXED_MMSYS_F26M		16
eb7beb65ac30afb Mars Cheng 2020-02-21  27  #define CLK_APMIXED_UFS26M		17
eb7beb65ac30afb Mars Cheng 2020-02-21  28  #define CLK_APMIXED_MIPIC1_26M		18
eb7beb65ac30afb Mars Cheng 2020-02-21  29  #define CLK_APMIXED_MEMPLL26M		19
eb7beb65ac30afb Mars Cheng 2020-02-21  30  #define CLK_APMIXED_CLKSQ_LVPLL_26M	20
eb7beb65ac30afb Mars Cheng 2020-02-21  31  #define CLK_APMIXED_MIPID0_26M		21
eb7beb65ac30afb Mars Cheng 2020-02-21 @32  #define CLK_APMIXED_NR_CLK		22
eb7beb65ac30afb Mars Cheng 2020-02-21  33  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH] clk: mediatek: Use devm_alloc for clk_data allocation to fix memory leak on probe error

[AngeloGioacchino Del Regno]

Il 29/09/25 04:36, Haotian Zhang ha scritto:
> The probe functions for the mt6765 apmixed, top, and infrasys clocks
> use mtk_alloc_clk_data() to allocate memory. This requires manual
> freeing of the memory in all error handling paths and in the driver's
> remove function.
> 
> Switch to mtk_devm_alloc_clk_data() in order to fix the memory leak in the
> probe function.
> 
> Fixes: 1aca9939bf72 ("clk: mediatek: Add MT6765 clock support")
> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>

You have to resend this to the correct recipients, and you have to fix the
commit title; something like

clk: mediatek: mt6765: Switch to mtk_devm_alloc_clk_data to fix memleak

For the code:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregnoòcollabora.com>

> ---
>   drivers/clk/mediatek/clk-mt6765.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mt6765.c b/drivers/clk/mediatek/clk-mt6765.c
> index d53731e7933f..5cfb9a3a5ee3 100644
> --- a/drivers/clk/mediatek/clk-mt6765.c
> +++ b/drivers/clk/mediatek/clk-mt6765.c
> @@ -736,7 +736,7 @@ static int clk_mt6765_apmixed_probe(struct platform_device *pdev)
>   	if (IS_ERR(base))
>   		return PTR_ERR(base);
>   
> -	clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
> +	clk_data = mtk_devm_alloc_clk_data(CLK_APMIXED_NR_CLK);
>   	if (!clk_data)
>   		return -ENOMEM;
>   
> @@ -770,7 +770,7 @@ static int clk_mt6765_top_probe(struct platform_device *pdev)
>   	if (IS_ERR(base))
>   		return PTR_ERR(base);
>   
> -	clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
> +	clk_data = mtk_devm_alloc_clk_data(CLK_TOP_NR_CLK);
>   	if (!clk_data)
>   		return -ENOMEM;
>   
> @@ -810,7 +810,7 @@ static int clk_mt6765_ifr_probe(struct platform_device *pdev)
>   	if (IS_ERR(base))
>   		return PTR_ERR(base);
>   
> -	clk_data = mtk_alloc_clk_data(CLK_IFR_NR_CLK);
> +	clk_data = mtk_devm_alloc_clk_data(CLK_IFR_NR_CLK);
>   	if (!clk_data)
>   		return -ENOMEM;
>