summaryrefslogtreecommitdiffstats
path: root/drivers/s390
diff options
context:
space:
mode:
authorEric Farman <farman@linux.ibm.com>2019-02-22 19:39:41 +0100
committerCornelia Huck <cohuck@redhat.com>2019-02-26 18:30:13 +0100
commit2904337fd981217784c2820abdee537aa0c70330 (patch)
treeeb59a48de72f12eaa13a8dd0cf74d2a4e4900758 /drivers/s390
parent48bd0eee8eca0920b6a15c4663e02ea434fe1fdf (diff)
downloadlinux-2904337fd981217784c2820abdee537aa0c70330.tar.bz2
s390/cio: Use cpa range elsewhere within vfio-ccw
Since we have a little function to see whether a channel program address falls within a range of CCWs, let's use it in the other places of code that make these checks. (Why isn't ccw_head fully removed? Well, because this way some longs lines don't have to be reflowed.) Signed-off-by: Eric Farman <farman@linux.ibm.com> Message-Id: <20190222183941.29596-3-farman@linux.ibm.com> Reviewed-by: Farhan Ali <alifm@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/vfio_ccw_cp.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c
index 488b76cd6fb9..384b3987eeb4 100644
--- a/drivers/s390/cio/vfio_ccw_cp.c
+++ b/drivers/s390/cio/vfio_ccw_cp.c
@@ -443,13 +443,11 @@ static int ccwchain_calc_length(u64 iova, struct channel_program *cp)
static int tic_target_chain_exists(struct ccw1 *tic, struct channel_program *cp)
{
struct ccwchain *chain;
- u32 ccw_head, ccw_tail;
+ u32 ccw_head;
list_for_each_entry(chain, &cp->ccwchain_list, next) {
ccw_head = chain->ch_iova;
- ccw_tail = ccw_head + (chain->ch_len - 1) * sizeof(struct ccw1);
-
- if ((ccw_head <= tic->cda) && (tic->cda <= ccw_tail))
+ if (is_cpa_within_range(tic->cda, ccw_head, chain->ch_len))
return 1;
}
@@ -516,13 +514,11 @@ static int ccwchain_fetch_tic(struct ccwchain *chain,
{
struct ccw1 *ccw = chain->ch_ccw + idx;
struct ccwchain *iter;
- u32 ccw_head, ccw_tail;
+ u32 ccw_head;
list_for_each_entry(iter, &cp->ccwchain_list, next) {
ccw_head = iter->ch_iova;
- ccw_tail = ccw_head + (iter->ch_len - 1) * sizeof(struct ccw1);
-
- if ((ccw_head <= ccw->cda) && (ccw->cda <= ccw_tail)) {
+ if (is_cpa_within_range(ccw->cda, ccw_head, iter->ch_len)) {
ccw->cda = (__u32) (addr_t) (((char *)iter->ch_ccw) +
(ccw->cda - ccw_head));
return 0;
@@ -864,7 +860,7 @@ void cp_update_scsw(struct channel_program *cp, union scsw *scsw)
{
struct ccwchain *chain;
u32 cpa = scsw->cmd.cpa;
- u32 ccw_head, ccw_tail;
+ u32 ccw_head;
/*
* LATER:
@@ -874,9 +870,7 @@ void cp_update_scsw(struct channel_program *cp, union scsw *scsw)
*/
list_for_each_entry(chain, &cp->ccwchain_list, next) {
ccw_head = (u32)(u64)chain->ch_ccw;
- ccw_tail = (u32)(u64)(chain->ch_ccw + chain->ch_len - 1);
-
- if ((ccw_head <= cpa) && (cpa <= ccw_tail)) {
+ if (is_cpa_within_range(cpa, ccw_head, chain->ch_len)) {
/*
* (cpa - ccw_head) is the offset value of the host
* physical ccw to its chain head.