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vmbus: Reuse uuid_le_to_bin() helper 

Instead of open coded variant use generic helper to convert UUID strings
to binary format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2017-05-18 10:46:06 -07:00 committed by Greg Kroah-Hartman
parent e917a5e23a
commit 3110010896
1 changed files with 10 additions and 41 deletions
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51
drivers/hv/vmbus_drv.c
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@ -608,40 +608,6 @@ static void vmbus_free_dynids(struct hv_driver *drv)
spin_unlock(&drv->dynids.lock);
}
/* Parse string of form: 1b4e28ba-2fa1-11d2-883f-b9a761bde3f */
static int get_uuid_le(const char *str, uuid_le *uu)
{
unsigned int b[16];
int i;
if (strlen(str) < 37)
return -1;
for (i = 0; i < 36; i++) {
switch (i) {
case 8: case 13: case 18: case 23:
if (str[i] != '-')
return -1;
break;
default:
if (!isxdigit(str[i]))
return -1;
}
}
/* unparse little endian output byte order */
if (sscanf(str,
"%2x%2x%2x%2x-%2x%2x-%2x%2x-%2x%2x-%2x%2x%2x%2x%2x%2x",
&b[3], &b[2], &b[1], &b[0],
&b[5], &b[4], &b[7], &b[6], &b[8], &b[9],
&b[10], &b[11], &b[12], &b[13], &b[14], &b[15]) != 16)
return -1;
for (i = 0; i < 16; i++)
uu->b[i] = b[i];
return 0;
}
/*
* store_new_id - sysfs frontend to vmbus_add_dynid()
*
@ -651,11 +617,12 @@ static ssize_t new_id_store(struct device_driver *driver, const char *buf,
size_t count)
{
struct hv_driver *drv = drv_to_hv_drv(driver);
uuid_le guid = NULL_UUID_LE;
uuid_le guid;
ssize_t retval;
if (get_uuid_le(buf, &guid) != 0)
return -EINVAL;
retval = uuid_le_to_bin(buf, &guid);
if (retval)
return retval;
if (hv_vmbus_get_id(drv, &guid))
return -EEXIST;
@ -677,12 +644,14 @@ static ssize_t remove_id_store(struct device_driver *driver, const char *buf,
{
struct hv_driver *drv = drv_to_hv_drv(driver);
struct vmbus_dynid *dynid, *n;
uuid_le guid = NULL_UUID_LE;
size_t retval = -ENODEV;
uuid_le guid;
ssize_t retval;
if (get_uuid_le(buf, &guid))
return -EINVAL;
retval = uuid_le_to_bin(buf, &guid);
if (retval)
return retval;
retval = -ENODEV;
spin_lock(&drv->dynids.lock);
list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
struct hv_vmbus_device_id *id = &dynid->id;