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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>
This commit is contained in:
Alexander Schmidt 2010-07-05 16:19:25 +00:00 committed by Roland Dreier
parent 91fb0dd9cb
commit e675b6db12
3 changed files with 34 additions and 11 deletions
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32
drivers/infiniband/hw/ehca/hcp_if.c
View File

@ -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);

11
drivers/infiniband/hw/ehca/hcp_phyp.c
View File

@ -42,10 +42,9 @@
#include "ehca_classes.h"
#include "hipz_hw.h"
int hcall_map_page(u64 physaddr, u64 *mapaddr)
u64 hcall_map_page(u64 physaddr)
{
*mapaddr = (u64)(ioremap(physaddr, EHCA_PAGESIZE));
return 0;
return (u64)ioremap(physaddr, EHCA_PAGESIZE);
}
int hcall_unmap_page(u64 mapaddr)
@ -58,9 +57,9 @@ int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
u64 paddr_kernel, u64 paddr_user)
{
if (!is_user) {
int ret = hcall_map_page(paddr_kernel, &galpas->kernel.fw_handle);
if (ret)
return ret;
galpas->kernel.fw_handle = hcall_map_page(paddr_kernel);
if (!galpas->kernel.fw_handle)
return -ENOMEM;
} else
galpas->kernel.fw_handle = 0;

2
drivers/infiniband/hw/ehca/hcp_phyp.h
View File

@ -83,7 +83,7 @@ int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
int hcp_galpas_dtor(struct h_galpas *galpas);
int hcall_map_page(u64 physaddr, u64 * mapaddr);
u64 hcall_map_page(u64 physaddr);
int hcall_unmap_page(u64 mapaddr);