Commit 6ae3483d authored Jun 27, 2019 by Sebastian Ott Committed by Vasily Gorbik Jul 04, 2019

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>

parent c7ff0e91

arch/s390/pci/pci_clp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)

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