diff options
| author | Alexander Schmidt <alexs@linux.vnet.ibm.com> | 2010-07-05 20:19:25 +0400 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-07-21 23:46:29 +0400 |
| commit | e675b6db1245649f91bb1bfb10baef9af6d3f8e6 (patch) | |
| tree | 83a471d78fb6b118aedd269f8eb5ac0b9b8b9336 /drivers/infiniband/hw/ehca/hcp_if.c | |
| parent | 91fb0dd9cb71ab1a90ab1f48c34b935fdbca55b9 (diff) | |
| download | linux-e675b6db1245649f91bb1bfb10baef9af6d3f8e6.tar.xz | |
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>
Diffstat (limited to 'drivers/infiniband/hw/ehca/hcp_if.c')
| -rw-r--r-- | drivers/infiniband/hw/ehca/hcp_if.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/ehca/hcp_if.c b/drivers/infiniband/hw/ehca/hcp_if.c index 4d5dc3304d42..e6f9cdd94c7a 100644 --- a/drivers/infiniband/hw/ehca/hcp_if.c +++ b/drivers/infiniband/hw/ehca/hcp_if.c @@ -269,6 +269,7 @@ u64 hipz_h_alloc_resource_cq(const struct ipz_adapter_handle adapter_handle, struct ehca_cq *cq, struct ehca_alloc_cq_parms *param) { + int rc; u64 ret; unsigned long outs[PLPAR_HCALL9_BUFSIZE]; @@ -283,8 +284,19 @@ u64 hipz_h_alloc_resource_cq(const struct ipz_adapter_handle adapter_handle, 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_cq(const struct ipz_adapter_handle adapter_handle, 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 @@ u64 hipz_h_alloc_resource_qp(const struct ipz_adapter_handle adapter_handle, 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); |