IB/ehca: Catch failing ioremap()
When ioremap() fails with a NULL pointer, catch the error and pass it
to the caller of create_qp() or create_cq() instead of trying to
dereference the NULL pointer later on.
Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ehca/hcp_if.c b/drivers/infiniband/hw/ehca/hcp_if.c
index 4d5dc33..e6f9cdd 100644
--- a/drivers/infiniband/hw/ehca/hcp_if.c
+++ b/drivers/infiniband/hw/ehca/hcp_if.c
@@ -269,6 +269,7 @@
struct ehca_cq *cq,
struct ehca_alloc_cq_parms *param)
{
+ int rc;
u64 ret;
unsigned long outs[PLPAR_HCALL9_BUFSIZE];
@@ -283,8 +284,19 @@
param->act_nr_of_entries = (u32)outs[3];
param->act_pages = (u32)outs[4];
- if (ret == H_SUCCESS)
- hcp_galpas_ctor(&cq->galpas, 0, outs[5], outs[6]);
+ if (ret == H_SUCCESS) {
+ rc = hcp_galpas_ctor(&cq->galpas, 0, outs[5], outs[6]);
+ if (rc) {
+ ehca_gen_err("Could not establish HW access. rc=%d paddr=%#lx",
+ rc, outs[5]);
+
+ ehca_plpar_hcall_norets(H_FREE_RESOURCE,
+ adapter_handle.handle, /* r4 */
+ cq->ipz_cq_handle.handle, /* r5 */
+ 0, 0, 0, 0, 0);
+ ret = H_NO_MEM;
+ }
+ }
if (ret == H_NOT_ENOUGH_RESOURCES)
ehca_gen_err("Not enough resources. ret=%lli", ret);
@@ -295,6 +307,7 @@
u64 hipz_h_alloc_resource_qp(const struct ipz_adapter_handle adapter_handle,
struct ehca_alloc_qp_parms *parms, int is_user)
{
+ int rc;
u64 ret;
u64 allocate_controls, max_r10_reg, r11, r12;
unsigned long outs[PLPAR_HCALL9_BUFSIZE];
@@ -358,8 +371,19 @@
parms->rqueue.queue_size =
(u32)EHCA_BMASK_GET(H_ALL_RES_QP_RQUEUE_SIZE_PAGES, outs[4]);
- if (ret == H_SUCCESS)
- hcp_galpas_ctor(&parms->galpas, is_user, outs[6], outs[6]);
+ if (ret == H_SUCCESS) {
+ rc = hcp_galpas_ctor(&parms->galpas, is_user, outs[6], outs[6]);
+ if (rc) {
+ ehca_gen_err("Could not establish HW access. rc=%d paddr=%#lx",
+ rc, outs[6]);
+
+ ehca_plpar_hcall_norets(H_FREE_RESOURCE,
+ adapter_handle.handle, /* r4 */
+ parms->qp_handle.handle, /* r5 */
+ 0, 0, 0, 0, 0);
+ ret = H_NO_MEM;
+ }
+ }
if (ret == H_NOT_ENOUGH_RESOURCES)
ehca_gen_err("Not enough resources. ret=%lli", ret);