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IB/hfi1: Expand reported serial number

PATCH Applied ira.weiny 2 participants 2 messages Jul 28, 2016 – Aug 3, 2016 1 message not in the archive

Subsystems (2)
InfiniBand HFI1 driver
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PATCH 1/1 IB/hfi1: Expand reported serial number

Expand the serial number space by using more bits
from the GUID.

Reviewed-by Jubin John <[email protected]>
Signed-off-by Dean Luick <[email protected]>
Signed-off-by Ira Weiny <[email protected]>
---
 drivers/infiniband/hw/hfi1/chip.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
drivers/infiniband/hw/hfi1/chip.c +7 -1
index becc7b11e31e..c93683496614 100644
@@ -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;
Signature · 6 lines
1.8.2

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