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authorHoang-Nam Nguyen <hnguyen@linux.vnet.ibm.com>2008-04-29 13:46:52 -0700
committerRoland Dreier <rolandd@cisco.com>2008-04-29 13:46:52 -0700
commit7df109d917e85d3da2e25bd495c4997e87ed2a4e (patch)
tree6eac844aee0badb05ac40dbfe1b3fe142e9d9f09 /drivers/infiniband
parentf8b0dfd15277974b5c9f3ff17f9e3ab6fdbe45ee (diff)
IB/ehca: handle negative return value from ibmebus_request_irq() properly
ehca_create_eq() was assigning a signed return value to an unsiged local variable and then checking if the variable was < 0, which meant that errors were always ignored. Fix this by using one variable for signed integer return values and another for u64 hcall return values. Bug originally found by Roel Kluin <12o3l@tiscali.nl>. Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/ehca/ehca_eq.c35
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_eq.c b/drivers/infiniband/hw/ehca/ehca_eq.c
index b4ac617a70e6..49660dfa1867 100644
--- a/drivers/infiniband/hw/ehca/ehca_eq.c
+++ b/drivers/infiniband/hw/ehca/ehca_eq.c
@@ -54,7 +54,8 @@ int ehca_create_eq(struct ehca_shca *shca,
struct ehca_eq *eq,
const enum ehca_eq_type type, const u32 length)
{
- u64 ret;
+ int ret;
+ u64 h_ret;
u32 nr_pages;
u32 i;
void *vpage;
@@ -73,15 +74,15 @@ int ehca_create_eq(struct ehca_shca *shca,
return -EINVAL;
}
- ret = hipz_h_alloc_resource_eq(shca->ipz_hca_handle,
- &eq->pf,
- type,
- length,
- &eq->ipz_eq_handle,
- &eq->length,
- &nr_pages, &eq->ist);
+ h_ret = hipz_h_alloc_resource_eq(shca->ipz_hca_handle,
+ &eq->pf,
+ type,
+ length,
+ &eq->ipz_eq_handle,
+ &eq->length,
+ &nr_pages, &eq->ist);
- if (ret != H_SUCCESS) {
+ if (h_ret != H_SUCCESS) {
ehca_err(ib_dev, "Can't allocate EQ/NEQ. eq=%p", eq);
return -EINVAL;
}
@@ -97,24 +98,22 @@ int ehca_create_eq(struct ehca_shca *shca,
u64 rpage;
vpage = ipz_qpageit_get_inc(&eq->ipz_queue);
- if (!vpage) {
- ret = H_RESOURCE;
+ if (!vpage)
goto create_eq_exit2;
- }
rpage = virt_to_abs(vpage);
- ret = hipz_h_register_rpage_eq(shca->ipz_hca_handle,
- eq->ipz_eq_handle,
- &eq->pf,
- 0, 0, rpage, 1);
+ h_ret = hipz_h_register_rpage_eq(shca->ipz_hca_handle,
+ eq->ipz_eq_handle,
+ &eq->pf,
+ 0, 0, rpage, 1);
if (i == (nr_pages - 1)) {
/* last page */
vpage = ipz_qpageit_get_inc(&eq->ipz_queue);
- if (ret != H_SUCCESS || vpage)
+ if (h_ret != H_SUCCESS || vpage)
goto create_eq_exit2;
} else {
- if (ret != H_PAGE_REGISTERED || !vpage)
+ if (h_ret != H_PAGE_REGISTERED || !vpage)
goto create_eq_exit2;
}
}