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[2/7] RDMA/i40iw: Correct STag mask to min of 14 bits

Message ID 1461352469-16504-3-git-send-email-tatyana.e.nikolova@intel.com (mailing list archive)
State Accepted
Headers show

Commit Message

Nikolova, Tatyana E April 22, 2016, 7:14 p.m. UTC 
From: Chien Tin Tung <Chien.Tin.Tung@intel.com>

STag index mask is calculated incorrectly, missing
the 14 bits minimum requirement. Add max macro to use
either # of MRs or 14 bits in the mask size calculation.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
---
 drivers/infiniband/hw/i40iw/i40iw_hw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/infiniband/hw/i40iw/i40iw_hw.c b/drivers/infiniband/hw/i40iw/i40iw_hw.c
index 615e115..3ee0cad 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_hw.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_hw.c
@@ -107,7 +107,8 @@  u32 i40iw_initialize_hw_resources(struct i40iw_device *iwdev)
 
 	spin_lock_init(&iwdev->resource_lock);
 	spin_lock_init(&iwdev->qptable_lock);
-	mrdrvbits = 24 - get_count_order(iwdev->max_mr);
+	/* stag index mask has a minimum of 14 bits */
+	mrdrvbits = 24 - max(get_count_order(iwdev->max_mr), 14);
 	iwdev->mr_stagmask = ~(((1 << mrdrvbits) - 1) << (32 - mrdrvbits));
 	return 0;
 }