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authorJan Glauber <jang@linux.vnet.ibm.com>2008-12-25 13:38:43 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:58 +0100
commitbbd50e172f75b1d12ef9b1bcf593b51a44199016 (patch)
tree85cffdd66bb9f4da36d604d857959964736f3fde /drivers/s390/cio/qdio_setup.c
parent43c207e6e5b7e591b59294ee4fc9860b0e3de3b8 (diff)
downloadop-kernel-dev-bbd50e172f75b1d12ef9b1bcf593b51a44199016.zip
op-kernel-dev-bbd50e172f75b1d12ef9b1bcf593b51a44199016.tar.gz
[S390] qdio: fix qeth port count detection
qeth needs to get the port count information before qdio has allocated a page for the chsc operation. Extend qdio_get_ssqd_desc() to store the data in the specified structure. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_setup.c')
-rw-r--r--drivers/s390/cio/qdio_setup.c33
1 files changed, 24 insertions, 9 deletions
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index a0b6b46..22ee027 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -243,22 +243,31 @@ no_qebsm:
QDIO_DBF_TEXT0(0, setup, "noV=V");
}
-static int __get_ssqd_info(struct qdio_irq *irq_ptr)
+/*
+ * If there is a qdio_irq we use the chsc_page and store the information
+ * in the qdio_irq, otherwise we copy it to the specified structure.
+ */
+int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
+ struct subchannel_id *schid,
+ struct qdio_ssqd_desc *data)
{
struct chsc_ssqd_area *ssqd;
int rc;
QDIO_DBF_TEXT0(0, setup, "getssqd");
- ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
+ if (irq_ptr != NULL)
+ ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
+ else
+ ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
memset(ssqd, 0, PAGE_SIZE);
ssqd->request = (struct chsc_header) {
.length = 0x0010,
.code = 0x0024,
};
- ssqd->first_sch = irq_ptr->schid.sch_no;
- ssqd->last_sch = irq_ptr->schid.sch_no;
- ssqd->ssid = irq_ptr->schid.ssid;
+ ssqd->first_sch = schid->sch_no;
+ ssqd->last_sch = schid->sch_no;
+ ssqd->ssid = schid->ssid;
if (chsc(ssqd))
return -EIO;
@@ -268,11 +277,17 @@ static int __get_ssqd_info(struct qdio_irq *irq_ptr)
if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
- (ssqd->qdio_ssqd.sch != irq_ptr->schid.sch_no))
+ (ssqd->qdio_ssqd.sch != schid->sch_no))
return -EINVAL;
- memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
- sizeof(struct qdio_ssqd_desc));
+ if (irq_ptr != NULL)
+ memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
+ sizeof(struct qdio_ssqd_desc));
+ else {
+ memcpy(data, &ssqd->qdio_ssqd,
+ sizeof(struct qdio_ssqd_desc));
+ free_page((unsigned long)ssqd);
+ }
return 0;
}
@@ -282,7 +297,7 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
char dbf_text[15];
int rc;
- rc = __get_ssqd_info(irq_ptr);
+ rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
if (rc) {
QDIO_DBF_TEXT2(0, setup, "ssqdasig");
sprintf(dbf_text, "schn%4x", irq_ptr->schid.sch_no);
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