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authorSebastian Ott <sebott@linux.vnet.ibm.com>2013-06-05 18:58:35 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-26 21:10:14 +0200
commitda5b6cb162b6bef39d76446a5e015d6a111459b1 (patch)
treedae7bc447358be3c4f2a25e27c9a2d2bf1e1034b /drivers/s390/cio/qdio_setup.c
parentd475f942b1dd6a897dac3ad4ed98d6994b275378 (diff)
s390/qdio: cleanup chsc SSQD usage
Cleanup the function qdio_setup_get_ssqd. Fix some possible memleaks and an unchecked allocation and create a wrapper for SSQD in chsc.c . Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@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.c47
1 files changed, 19 insertions, 28 deletions
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 16ecd35b8e51..f5f4a91fab44 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -254,40 +254,31 @@ int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
int rc;
DBF_EVENT("getssqd:%4x", schid->sch_no);
- if (irq_ptr != NULL)
- ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
- else
+ if (!irq_ptr) {
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 = schid->sch_no;
- ssqd->last_sch = schid->sch_no;
- ssqd->ssid = schid->ssid;
-
- if (chsc(ssqd))
- return -EIO;
- rc = chsc_error_from_response(ssqd->response.code);
+ if (!ssqd)
+ return -ENOMEM;
+ } else {
+ ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
+ }
+
+ rc = chsc_ssqd(*schid, ssqd);
if (rc)
- return rc;
+ goto out;
if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
(ssqd->qdio_ssqd.sch != schid->sch_no))
- return -EINVAL;
-
- 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));
+ rc = -EINVAL;
+
+ if (!rc)
+ memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
+
+out:
+ if (!irq_ptr)
free_page((unsigned long)ssqd);
- }
- return 0;
+
+ return rc;
}
void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
@@ -295,7 +286,7 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
unsigned char qdioac;
int rc;
- rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
+ rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
if (rc) {
DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%x", rc);