From: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
The irdma driver can use a maximum number of msix
vectors equal to num_online_cpus() + 1 and the Kernel
warning stack below is shown if that number is exceeded.
The kernel throws a warning as the driver tries to update
the affinity hint with a CPU mask greater than the max CPU IDs.
Fix this by capping the MSIX vectors to num_online_cpus() + 1.
kernel: WARNING: CPU: 7 PID: 23655 at include/linux/cpumask.h:106 irdma_cfg_ceq_vector+0x34c/0x3f0 [irdma]
kernel: RIP: 0010:irdma_cfg_ceq_vector+0x34c/0x3f0 [irdma]
kernel: Call Trace:
kernel: irdma_rt_init_hw+0xa62/0x1290 [irdma]
Fixes: 44d9e52977a1 ("RDMA/irdma: Implement device initialization definitions")
Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
Signed-off-by: Sindhu Devale <sindhu.devale@xxxxxxxxx>
---
drivers/infiniband/hw/irdma/hw.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index ab246447520b..2e1e2bad0401 100644
--- a/drivers/infiniband/hw/irdma/hw.c
+++ b/drivers/infiniband/hw/irdma/hw.c
@@ -483,6 +483,8 @@ static int irdma_save_msix_info(struct irdma_pci_f *rf)
iw_qvlist->num_vectors = rf->msix_count;
if (rf->msix_count <= num_online_cpus())
rf->msix_shared = true;
+ else if (rf->msix_count > num_online_cpus() + 1)
+ rf->msix_count = num_online_cpus() + 1;
pmsix = rf->msix_entries;
for (i = 0, ceq_idx = 0; i < rf->msix_count; i++, iw_qvinfo++) {
--
2.27.0
