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s390-bios: Extend find_dev() for non-virtio devices 

We need a method for finding the subchannel of a dasd device. Let's
modify find_dev to handle this since it mostly does what we need. Up to
this point find_dev has been specific to only virtio devices.

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-11-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Jason J. Herne 2019-04-04 10:34:29 -04:00 committed by Thomas Huth
parent 86c58705bb
commit 930072d2bf
1 changed files with 11 additions and 5 deletions
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16
pc-bios/s390-ccw/main.c
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@ -52,6 +52,12 @@ unsigned int get_loadparm_index(void)
return atoui(loadparm_str);
}
/*
* Find the subchannel connected to the given device (dev_no) and fill in the
* subchannel information block (schib) with the connected subchannel's info.
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
*/
static bool find_dev(Schib *schib, int dev_no)
{
int i, r;
@ -65,15 +71,15 @@ static bool find_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
if (!virtio_is_supported(blk_schid)) {
continue;
}
/* Skip net devices since no IPLB is created and therefore no
* no network bootloader has been loaded
* network bootloader has been loaded
*/
if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
if (virtio_is_supported(blk_schid) &&
virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
}
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
return true;
}