diff mbox

IB/hfi1: Expand reported serial number

Message ID 20160728010940.GD3158@phlsvsds.ph.intel.com (mailing list archive)
State Accepted
Headers show

Commit Message

Ira Weiny July 28, 2016, 1:09 a.m. UTC 
Expand the serial number space by using more bits
from the GUID.

Reviewed-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/infiniband/hw/hfi1/chip.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Comments

Doug Ledford Aug. 3, 2016, 2:47 a.m. UTC | #1 
On Wed, 2016-07-27 at 21:09 -0400, ira.weiny wrote:
> Expand the serial number space by using more bits
> from the GUID.
> 
> Reviewed-by: Jubin John <jubin.john@intel.com>
> Signed-off-by: Dean Luick <dean.luick@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> 

Thanks, applied.
diff mbox

Patch

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index becc7b11e31e..c93683496614 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -14601,8 +14601,14 @@  struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev,
 	/* set up LCB access - must be after set_up_interrupts() */
 	init_lcb_access(dd);
 
+	/*
+	 * Serial number is created from the base guid:
+	 * [27:24] = base guid [38:35]
+	 * [23: 0] = base guid [23: 0]
+	 */
 	snprintf(dd->serial, SERIAL_MAX, "0x%08llx\n",
-		 dd->base_guid & 0xFFFFFF);
+		 (dd->base_guid & 0xFFFFFF) |
+		     ((dd->base_guid >> 11) & 0xF000000));
 
 	dd->oui1 = dd->base_guid >> 56 & 0xFF;
 	dd->oui2 = dd->base_guid >> 48 & 0xFF;