This is a note to let you know that I've just added the patch titled ntb_hw_switchtec: Fix pff ioread to read into mmio_part_cfg_all to the 5.15-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: ntb_hw_switchtec-fix-pff-ioread-to-read-into-mmio_pa.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 729fa8b2f7446f9fa327907cfc8370cf84de3d14 Author: Jeremy Pallotta <jmpallotta@xxxxxxxxx> Date: Thu Dec 23 17:23:29 2021 -0800 ntb_hw_switchtec: Fix pff ioread to read into mmio_part_cfg_all [ Upstream commit 32c3d375b0ed84b6acb51ae5ebef35ff0d649d85 ] Array mmio_part_cfg_all holds the partition configuration of all partitions, with partition number as index. Fix this by reading into mmio_part_cfg_all for pff. Fixes: 0ee28f26f378 ("NTB: switchtec_ntb: Add link management") Signed-off-by: Jeremy Pallotta <jmpallotta@xxxxxxxxx> Signed-off-by: Kelvin Cao <kelvin.cao@xxxxxxxxxxxxx> Signed-off-by: Jon Mason <jdmason@xxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c index 4c6eb61a6ac62..6603c77c0a848 100644 --- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c +++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c @@ -419,8 +419,8 @@ static void switchtec_ntb_part_link_speed(struct switchtec_ntb *sndev, enum ntb_width *width) { struct switchtec_dev *stdev = sndev->stdev; - - u32 pff = ioread32(&stdev->mmio_part_cfg[partition].vep_pff_inst_id); + u32 pff = + ioread32(&stdev->mmio_part_cfg_all[partition].vep_pff_inst_id); u32 linksta = ioread32(&stdev->mmio_pff_csr[pff].pci_cap_region[13]); if (speed)