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

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[ 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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Dean Luick <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Ilpo Järvinen 2023-09-19 15:56:41 +03:00 • committed by Greg Kroah-Hartman
commit e18d266fb3
1 changed files with 2 additions and 7 deletions
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9
drivers/infiniband/hw/hfi1/pcie.c
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@ -45,6 +45,7 @@
*
*/
#include <linux/bitfield.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/delay.h>
@ -261,12 +262,6 @@ 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)
{
@ -279,7 +274,7 @@ 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);