Home Home > GIT Browse
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorSebastian Ott <sebott@linux.ibm.com>2018-04-11 11:21:17 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-04-23 07:57:16 +0200
commitaf2e460ade0b0180d0f3812ca4f4f59cc9597f3e (patch)
treef5e8386cad47d09d89a2ba41bfcf857dc80587cd
parent6d08b06e67cd117f6992c46611dfb4ce267cd71e (diff)
s390/cio: update chpid descriptor after resource accessibility event
Channel path descriptors have been seen as something stable (as long as the chpid is configured). Recent tests have shown that the descriptor can also be altered when the link state of a channel path changes. Thus it is necessary to update the descriptor during handling of resource accessibility events. Cc: <stable@vger.kernel.org> Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/cio/chsc.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 6652a49a49b1..9029804dcd22 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -452,6 +452,7 @@ static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
{
+ struct channel_path *chp;
struct chp_link link;
struct chp_id chpid;
int status;
@@ -464,10 +465,17 @@ static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
chpid.id = sei_area->rsid;
/* allocate a new channel path structure, if needed */
status = chp_get_status(chpid);
- if (status < 0)
- chp_new(chpid);
- else if (!status)
+ if (!status)
return;
+
+ if (status < 0) {
+ chp_new(chpid);
+ } else {
+ chp = chpid_to_chp(chpid);
+ mutex_lock(&chp->lock);
+ chp_update_desc(chp);
+ mutex_unlock(&chp->lock);
+ }
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
if ((sei_area->vf & 0xc0) != 0) {