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[S390] dasd: Add ipldev parameter.

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Specifying 'ipldev' in the dasd= kernel parameter will automatically
activate the boot device for use by the dasd driver.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2007-04-27 16:01:48 +02:00 committed by Martin Schwidefsky
parent 4dfd5c4593
commit 7039d3a11c
1 changed files with 17 additions and 0 deletions
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17
drivers/s390/block/dasd_devmap.c
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@ -19,6 +19,7 @@
#include <asm/debug.h>
#include <asm/uaccess.h>
#include <asm/ipl.h>
/* This is ugly... */
#define PRINTK_HEADER "dasd_devmap:"
@ -133,6 +134,8 @@ dasd_call_setup(char *str)
__setup ("dasd=", dasd_call_setup);
#endif /* #ifndef MODULE */
#define DASD_IPLDEV "ipldev"
/*
* Read a device busid/devno from a string.
*/
@ -141,6 +144,20 @@ dasd_busid(char **str, int *id0, int *id1, int *devno)
{
int val, old_style;
/* Interpret ipldev busid */
if (strncmp(DASD_IPLDEV, *str, strlen(DASD_IPLDEV)) == 0) {
if (ipl_info.type != IPL_TYPE_CCW) {
MESSAGE(KERN_ERR, "%s", "ipl device is not a ccw "
"device");
return -EINVAL;
}
*id0 = 0;
*id1 = ipl_info.data.ccw.dev_id.ssid;
*devno = ipl_info.data.ccw.dev_id.devno;
*str += strlen(DASD_IPLDEV);
return 0;
}
/* check for leading '0x' */
old_style = 0;
if ((*str)[0] == '0' && (*str)[1] == 'x') {