csiostor driver allocates per port num_online_cpus()
irq vectors, so create per port irq affinity mask
set to spread irq vectors evenly.
Signed-off-by: Varun Prakash <varun@xxxxxxxxxxx>
---
drivers/scsi/csiostor/csio_isr.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/csiostor/csio_isr.c b/drivers/scsi/csiostor/csio_isr.c
index 7c88147..b254040 100644
--- a/drivers/scsi/csiostor/csio_isr.c
+++ b/drivers/scsi/csiostor/csio_isr.c
@@ -474,13 +474,39 @@ csio_reduce_sqsets(struct csio_hw *hw, int cnt)
csio_dbg(hw, "Reduced sqsets to %d\n", hw->num_sqsets);
}
+static void csio_calc_sets(struct irq_affinity *affd, unsigned int nvecs)
+{
+ struct csio_hw *hw = affd->priv;
+ u8 i;
+
+ if (!nvecs)
+ return;
+
+ if (nvecs < hw->num_pports) {
+ affd->nr_sets = 1;
+ affd->set_size[0] = nvecs;
+ return;
+ }
+
+ affd->nr_sets = hw->num_pports;
+ for (i = 0; i < hw->num_pports; i++)
+ affd->set_size[i] = nvecs / hw->num_pports;
+}
+
static int
csio_enable_msix(struct csio_hw *hw)
{
int i, j, k, n, min, cnt;
int extra = CSIO_EXTRA_VECS;
struct csio_scsi_cpu_info *info;
- struct irq_affinity desc = { .pre_vectors = 2 };
+ struct irq_affinity desc = {
+ .pre_vectors = CSIO_EXTRA_VECS,
+ .calc_sets = csio_calc_sets,
+ .priv = hw,
+ };
+
+ if (hw->num_pports > IRQ_AFFINITY_MAX_SETS)
+ return -ENOSPC;
min = hw->num_pports + extra;
cnt = hw->num_sqsets + extra;
--
2.0.2
