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[S390] retry after deferred condition code.
[pandora-kernel.git]
/
drivers
/
s390
/
cio
/
device_ops.c
diff --git
a/drivers/s390/cio/device_ops.c
b/drivers/s390/cio/device_ops.c
index
8b02189
..
9e3de0b
100644
(file)
--- a/
drivers/s390/cio/device_ops.c
+++ b/
drivers/s390/cio/device_ops.c
@@
-1,14
+1,11
@@
/*
* drivers/s390/cio/device_ops.c
*
/*
* drivers/s390/cio/device_ops.c
*
- * $Revision: 1.61 $
- *
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
@@
-80,7
+77,8
@@
ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
- if (cdev->private->state == DEV_STATE_VERIFY) {
+ if (cdev->private->state == DEV_STATE_VERIFY ||
+ cdev->private->state == DEV_STATE_CLEAR_VERIFY) {
/* Remember to fake irb when finished. */
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = 1;
/* Remember to fake irb when finished. */
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = 1;
@@
-265,6
+263,9
@@
ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
/* Abuse intparm for error reporting. */
if (IS_ERR(irb))
cdev->private->intparm = -EIO;
/* Abuse intparm for error reporting. */
if (IS_ERR(irb))
cdev->private->intparm = -EIO;
+ else if (irb->scsw.cc == 1)
+ /* Retry for deferred condition code. */
+ cdev->private->intparm = -EAGAIN;
else if ((irb->scsw.dstat !=
(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
(irb->scsw.cstat != 0)) {
else if ((irb->scsw.dstat !=
(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
(irb->scsw.cstat != 0)) {
@@
-272,7
+273,8
@@
ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
* We didn't get channel end / device end. Check if path
* verification has been started; we can retry after it has
* finished. We also retry unit checks except for command reject
* We didn't get channel end / device end. Check if path
* verification has been started; we can retry after it has
* finished. We also retry unit checks except for command reject
- * or intervention required.
+ * or intervention required. Also check for long busy
+ * conditions.
*/
if (cdev->private->flags.doverify ||
cdev->private->state == DEV_STATE_VERIFY)
*/
if (cdev->private->flags.doverify ||
cdev->private->state == DEV_STATE_VERIFY)
@@
-281,6
+283,10
@@
ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
!(irb->ecw[0] &
(SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
cdev->private->intparm = -EAGAIN;
!(irb->ecw[0] &
(SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
cdev->private->intparm = -EAGAIN;
+ else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
+ (irb->scsw.dstat & DEV_STAT_DEV_END) &&
+ (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
+ cdev->private->intparm = -EAGAIN;
else
cdev->private->intparm = -EIO;
else
cdev->private->intparm = -EIO;
@@
-361,10
+367,9
@@
read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
CIO_TRACE_EVENT (4, "rddevch");
CIO_TRACE_EVENT (4, sch->dev.bus_id);
CIO_TRACE_EVENT (4, "rddevch");
CIO_TRACE_EVENT (4, sch->dev.bus_id);
- rdc_ccw = k
m
alloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+ rdc_ccw = k
z
alloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
if (!rdc_ccw)
return -ENOMEM;
if (!rdc_ccw)
return -ENOMEM;
- memset(rdc_ccw, 0, sizeof(struct ccw1));
rdc_ccw->cmd_code = CCW_CMD_RDC;
rdc_ccw->count = length;
rdc_ccw->flags = CCW_FLAG_SLI;
rdc_ccw->cmd_code = CCW_CMD_RDC;
rdc_ccw->count = length;
rdc_ccw->flags = CCW_FLAG_SLI;
@@
-428,16
+433,14
@@
read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lp
if (!ciw || ciw->cmd == 0)
return -EOPNOTSUPP;
if (!ciw || ciw->cmd == 0)
return -EOPNOTSUPP;
- rcd_ccw = k
m
alloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+ rcd_ccw = k
z
alloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
if (!rcd_ccw)
return -ENOMEM;
if (!rcd_ccw)
return -ENOMEM;
- memset(rcd_ccw, 0, sizeof(struct ccw1));
- rcd_buf = kmalloc(ciw->count, GFP_KERNEL | GFP_DMA);
+ rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
if (!rcd_buf) {
kfree(rcd_ccw);
return -ENOMEM;
}
if (!rcd_buf) {
kfree(rcd_ccw);
return -ENOMEM;
}
- memset (rcd_buf, 0, ciw->count);
rcd_ccw->cmd_code = ciw->cmd;
rcd_ccw->cda = (__u32) __pa (rcd_buf);
rcd_ccw->count = ciw->count;
rcd_ccw->cmd_code = ciw->cmd;
rcd_ccw->cda = (__u32) __pa (rcd_buf);
rcd_ccw->count = ciw->count;