linux-kernel - Re: [PATCH] test-hexdump: test the return value of the hex_dump_to

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Date:	Thu, 26 Feb 2015 11:31:21 +0800
From:	"long.wanglong" <long.wanglong@...wei.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC:	<akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org>,
	<peifeiyue@...wei.com>
Subject: Re: [PATCH] test-hexdump: test the return value of the hex_dump_to_buffer

On 2015/2/16 17:47, Andy Shevchenko wrote:
> On Sun, 2015-02-15 at 09:50 +0000, Wang Long wrote:
>> As the function hex_dump_to_buffer returns the amount of bytes placed
>> in the buffer without terminating NUL. the test-hexdump should test
>> the return value of it.
> 
> I don't think it's needed. When the prototype was changed the new test
> case had been introduced to cover the overflow cases, i.e.
> test_hexdump_overflow().
> 

ok, thanks.

>>
>> Signed-off-by: Wang Long <long.wanglong@...wei.com>
>> ---
>>  lib/test-hexdump.c | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/lib/test-hexdump.c b/lib/test-hexdump.c
>> index daf29a39..9243be7 100644
>> --- a/lib/test-hexdump.c
>> +++ b/lib/test-hexdump.c
>> @@ -52,8 +52,9 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
>>  	size_t l = len;
>>  	int gs = groupsize, rs = rowsize;
>>  	unsigned int i;
>> +	int r;
>>  
>> -	hex_dump_to_buffer(data_b, l, rs, gs, real, sizeof(real), ascii);
>> +	r = hex_dump_to_buffer(data_b, l, rs, gs, real, sizeof(real), ascii);
>>  
>>  	if (rs != 16 && rs != 32)
>>  		rs = 16;
>> @@ -96,7 +97,7 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
>>  
>>  	*p = '\0';
>>  
>> -	if (strcmp(test, real)) {
>> +	if (strcmp(test, real) || r != strlen(real)) {
>>  		pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize);
>>  		pr_err("Result: '%s'\n", real);
>>  		pr_err("Expect: '%s'\n", test);
> 
> 


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