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device-dax: Fix default return code of range_parse() 

The return value of range_parse() indicates the size when it is
positive.  The error code should be negative.

Signed-off-by: Shiyang Ruan <ruansy.fnst@cn.fujitsu.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20210126021331.1059933-1-ruansy.fnst@cn.fujitsu.com
Reported-by: Zhang Qilong <zhangqilong3@huawei.com>
Fixes: 8490e2e25b ("device-dax: add a range mapping allocation attribute")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Shiyang Ruan 2021-01-26 10:13:31 +08:00 committed by Dan Williams
parent 1048ba83fb
commit 7323fb22f0
1 changed files with 1 additions and 1 deletions
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2
drivers/dax/bus.c
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@ -1038,7 +1038,7 @@ static ssize_t range_parse(const char *opt, size_t len, struct range *range)
{
unsigned long long addr = 0;
char *start, *end, *str;
ssize_t rc = EINVAL;
ssize_t rc = -EINVAL;
str = kstrdup(opt, GFP_KERNEL);
if (!str)