Patch "RDMA/hfi1: Use FIELD_GET() to extract Link Width" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    RDMA/hfi1: Use FIELD_GET() to extract Link Width

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rdma-hfi1-use-field_get-to-extract-link-width.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b72049f1fda716afd3b11e173f9e6d1ecd21e7e0
Author: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Date:   Tue Sep 19 15:56:41 2023 +0300

    RDMA/hfi1: Use FIELD_GET() to extract Link Width
    
    [ Upstream commit 8bf7187d978610b9e327a3d92728c8864a575ebd ]
    
    Use FIELD_GET() to extract PCIe Negotiated Link Width field instead of
    custom masking and shifting, and remove extract_width() which only
    wraps that FIELD_GET().
    
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230919125648.1920-2-ilpo.jarvinen@xxxxxxxxxxxxxxx
    Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
    Reviewed-by: Dean Luick <dean.luick@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 08732e1ac9662..c132a9c073bff 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -3,6 +3,7 @@
  * Copyright(c) 2015 - 2019 Intel Corporation.
  */
 
+#include <linux/bitfield.h>
 #include <linux/pci.h>
 #include <linux/io.h>
 #include <linux/delay.h>
@@ -210,12 +211,6 @@ static u32 extract_speed(u16 linkstat)
 	return speed;
 }
 
-/* return the PCIe link speed from the given link status */
-static u32 extract_width(u16 linkstat)
-{
-	return (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT;
-}
-
 /* read the link status and set dd->{lbus_width,lbus_speed,lbus_info} */
 static void update_lbus_info(struct hfi1_devdata *dd)
 {
@@ -228,7 +223,7 @@ static void update_lbus_info(struct hfi1_devdata *dd)
 		return;
 	}
 
-	dd->lbus_width = extract_width(linkstat);
+	dd->lbus_width = FIELD_GET(PCI_EXP_LNKSTA_NLW, linkstat);
 	dd->lbus_speed = extract_speed(linkstat);
 	snprintf(dd->lbus_info, sizeof(dd->lbus_info),
 		 "PCIe,%uMHz,x%u", dd->lbus_speed, dd->lbus_width);



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