diff options
Diffstat (limited to 'drivers/scsi/st.c')
| -rw-r--r-- | drivers/scsi/st.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 9aadf2fcad6a..a93308ae9736 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -17,7 +17,7 @@ Last modified: 18-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support */ -static char *verstr = "20050802"; +static char *verstr = "20050830"; #include <linux/module.h> @@ -4440,12 +4440,12 @@ static int st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pag static int sgl_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages, unsigned long uaddr, size_t count, int rw) { + unsigned long end = (uaddr + count + PAGE_SIZE - 1) >> PAGE_SHIFT; + unsigned long start = uaddr >> PAGE_SHIFT; + const int nr_pages = end - start; int res, i, j; - unsigned int nr_pages; struct page **pages; - nr_pages = ((uaddr & ~PAGE_MASK) + count + ~PAGE_MASK) >> PAGE_SHIFT; - /* User attempted Overflow! */ if ((uaddr + count) < uaddr) return -EINVAL; |