9p: fix put_data error handling

Abhishek Kulkarni pointed out an inconsistency in the way
errors are returned from p9_put_data.  On deeper exploration it
seems the error handling for this path was completely wrong.
This patch adds checks for allocation problems and propagates
errors correctly.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen 2008-09-24 16:22:22 -05:00
parent 62aa528e02
commit 16ec470012

View file

@ -451,8 +451,10 @@ p9_put_data(struct cbuf *bufp, const char *data, int count,
unsigned char **pdata)
{
*pdata = buf_alloc(bufp, count);
if (*pdata == NULL)
return -ENOMEM;
memmove(*pdata, data, count);
return count;
return 0;
}
static int
@ -460,6 +462,8 @@ p9_put_user_data(struct cbuf *bufp, const char __user *data, int count,
unsigned char **pdata)
{
*pdata = buf_alloc(bufp, count);
if (*pdata == NULL)
return -ENOMEM;
return copy_from_user(*pdata, data, count);
}