cryptocop: fix assertion in create_output_descriptors()

size_t desc_len cannot be less than 0, test before the subtraction.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/cris/arch-v32/drivers/cryptocop.c b/arch/cris/arch-v32/drivers/cryptocop.c
index fd529a0ec758aa3a018df065729616310a39cf12..b70fb34939d97b68859f2fadbf042253ec70d659 100644 (file)
--- a/arch/cris/arch-v32/drivers/cryptocop.c
+++ b/arch/cris/arch-v32/drivers/cryptocop.c
@@ -628,9 +628,9 @@ static int create_output_descriptors(struct cryptocop_operation *operation, int
                cdesc->dma_descr->buf = (char*)virt_to_phys(operation->tfrm_op.indata[*iniov_ix].iov_base + *iniov_offset);
                cdesc->dma_descr->after = cdesc->dma_descr->buf + dlength;
 
+               assert(desc_len >= dlength);
                desc_len -= dlength;
                *iniov_offset += dlength;
-               assert(desc_len >= 0);
                if (*iniov_offset >= operation->tfrm_op.indata[*iniov_ix].iov_len) {
                        *iniov_offset = 0;
                        ++(*iniov_ix);