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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2007-04-27 16:01:48 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-04-27 16:01:44 +0200 |
| commit | 7039d3a11c4b4b59f9ef933b4b0a28304bdd07d1 (patch) | |
| tree | 4f9f731bb6494fb0a00b46a7b44f712ab57528e9 /drivers/s390/block/dasd_devmap.c | |
| parent | [S390] dasd: Add sysfs attribute status and generate uevents. (diff) | |
| download | linux-7039d3a11c4b4b59f9ef933b4b0a28304bdd07d1.tar.xz linux-7039d3a11c4b4b59f9ef933b4b0a28304bdd07d1.zip | |
[S390] dasd: Add ipldev parameter.
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>
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 66958b8d7c45..6a89cefe99bb 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -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') { |