Imported linux-2.6.27.39 suse/xen patches.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.arch / s390-08-01-cio-fix-mp-mode.diff

diff --git a/src/patches/suse-2.6.27.31/patches.arch/s390-08-01-cio-fix-mp-mode.diff b/src/patches/suse-2.6.27.31/patches.arch/s390-08-01-cio-fix-mp-mode.diff
deleted file mode 100644 (file)
index 852e22b..0000000
--- a/src/patches/suse-2.6.27.31/patches.arch/s390-08-01-cio-fix-mp-mode.diff
+++ /dev/null
@@ -1,61 +0,0 @@
-From: Gerald Schaefer <geraldsc@de.ibm.com>
-Subject: cio: fix subchannel multipath mode setup
-References: bnc#466462,LTC#51047
-
-Symptom:     Undefined behavior when trying to access DASD devices with more
-             than one CHPID: e.g. I/O errors due to timeouts after missing
-             interrupts, slow access to DASDs because single path mode is used.
-Problem:     Setup of subchannel multipath mode is not performed correctly
-             because changes to a local buffer are lost before they are sent
-             to the channel subsystem. In this state, the control unit assumes
-             multipath mode while the channel subsystem expects single path
-             mode. As a result, interrupts may not be correctly recognized
-             which leads to timeout situations and eventually I/O errors.
-             Also single path processing may slow down DASD access.
-Solution:    Apply changes to the subchannel configuration after modifying
-             the local buffer.
-
-Acked-by: John Jolly <jjolly@suse.de>
-
----
- drivers/s390/cio/device.c     |    6 ++++++
- drivers/s390/cio/device_fsm.c |    2 ++
- 2 files changed, 8 insertions(+)
-
-Index: linux-sles11/drivers/s390/cio/device.c
-===================================================================
---- linux-sles11.orig/drivers/s390/cio/device.c
-+++ linux-sles11/drivers/s390/cio/device.c
-@@ -1246,6 +1246,9 @@ static int io_subchannel_probe(struct su
-               return 0;
-       }
-       io_subchannel_init_fields(sch);
-+      rc = cio_modify(sch);
-+      if (rc)
-+              goto out_schedule;
-       /*
-        * First check if a fitting device may be found amongst the
-        * disconnected devices or in the orphanage.
-@@ -1676,6 +1679,9 @@ static int ccw_device_console_enable(str
-       sch->private = cio_get_console_priv();
-       memset(sch->private, 0, sizeof(struct io_subchannel_private));
-       io_subchannel_init_fields(sch);
-+      rc = cio_modify(sch);
-+      if (rc)
-+              return rc;
-       sch->driver = &io_subchannel_driver;
-       /* Initialize the ccw_device structure. */
-       cdev->dev.parent= &sch->dev;
-Index: linux-sles11/drivers/s390/cio/device_fsm.c
-===================================================================
---- linux-sles11.orig/drivers/s390/cio/device_fsm.c
-+++ linux-sles11/drivers/s390/cio/device_fsm.c
-@@ -1028,6 +1028,8 @@ void ccw_device_trigger_reprobe(struct c
-       sch->schib.pmcw.ena = 0;
-       if ((sch->lpm & (sch->lpm - 1)) != 0)
-               sch->schib.pmcw.mp = 1;
-+      if (cio_modify(sch))
-+              return;
-       /* We should also udate ssd info, but this has to wait. */
-       /* Check if this is another device which appeared on the same sch. */
-       if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {