s390/pci: Fix reset of IOMMU software counters

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Together with enabling the Function Measurement Block
zpci_fmb_enable_device() also resets the software counters. This allows
to use "echo 0 > /sys/kernel/debug/pci/<dev>/statistics" followed by
echo "1 > /../statistics" to reset all counters. In commit c76c067e48
("s390/pci: Use dma-iommu layer") this use of the now obsolete counters
in struct zpci_device was missed as was their removal. Fix this by
resetting the new counters and removing the old ones.

Fixes: c76c067e48 ("s390/pci: Use dma-iommu layer")
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20231004-dma_iommu_fix-v1-1-129777cd8232@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Niklas Schnelle 2023-10-04 10:56:12 +02:00 • committed by Joerg Roedel

parent 9f5b681e2a

commit 92bce97f0c

2 changed files with 10 additions and 7 deletions

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4

arch/s390/include/asm/pci.h

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13

arch/s390/pci/pci.c

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