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s390/pci: correctly handle MIO opt-out 

Do not issue CLP_SET_ENABLE_MIO after opting out of MIO instruction
usage. This should not fix a bug but reduce overhead within firmware.

Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
alistair/sunxi64-5.4-dsi
Sebastian Ott 2019-06-27 15:47:13 +02:00 committed by Vasily Gorbik
parent c7ff0e918a
commit 6ae3483d41
1 changed files with 1 additions and 1 deletions
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2
arch/s390/pci/pci_clp.c
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@ -291,7 +291,7 @@ int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
goto out;
zdev->fh = fh;
if (zdev->mio_capable) {
if (zpci_use_mio(zdev)) {
rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_MIO);
zpci_dbg(3, "ena mio fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
if (rc)