From d4fba63fe1f78dba749cf7aa04c1dff4b8666eb1 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 20 Jan 2023 14:08:57 +0200 Subject: cifs: Get rid of unneeded conditional in the smb2_get_aead_req() In the smb2_get_aead_req() the skip variable is used only for the very first iteration of the two nested loops, which means it's basically in invariant to those loops. Hence, instead of using conditional on each iteration, unconditionally assign the 'skip' variable before the loops and at the end of the inner loop. Signed-off-by: Andy Shevchenko Reviewed-by: Paulo Alcantara (SUSE) Reviewed-by: David Howells Signed-off-by: Steve French --- fs/cifs/smb2ops.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'fs/cifs/smb2ops.c') diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index e6bcd2baf446..157a19f371d6 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -4274,6 +4274,12 @@ static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *r sg_init_table(*sgl, num_sgs); sg = *sgl; + /* + * The first rqst has a transform header where the + * first 20 bytes are not part of the encrypted blob. + */ + skip = 20; + /* Assumes the first rqst has a transform header as the first iov. * I.e. * rqst[0].rq_iov[0] is transform header @@ -4281,17 +4287,15 @@ static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *r * rqst[1+].rq_iov[0+] data to be encrypted/decrypted */ for (i = 0; i < num_rqst; i++) { - /* - * The first rqst has a transform header where the - * first 20 bytes are not part of the encrypted blob. - */ for (j = 0; j < rqst[i].rq_nvec; j++) { struct kvec *iov = &rqst[i].rq_iov[j]; - skip = (i == 0) && (j == 0) ? 20 : 0; addr = (unsigned long)iov->iov_base + skip; len = iov->iov_len - skip; sg = cifs_sg_set_buf(sg, (void *)addr, len); + + /* See the above comment on the 'skip' assignment */ + skip = 0; } for (j = 0; j < rqst[i].rq_npages; j++) { rqst_page_get_length(&rqst[i], j, &len, &off); -- cgit