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nvme-pci: clean up CMBMSC when registering CMB fails

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CMB decoding should get disabled when the CMB block isn't successfully
registered to P2P DMA subsystem.

Clean up the CMBMSC register in this error handling codepath to disable
CMB decoding (and CMBLOC/CMBSZ registers).

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Icenowy Zheng
2025-02-13 01:04:43 +08:00
committed by Keith Busch
parent 8c1624b63a
commit 6a3572e10f
1 changed files with 1 additions and 0 deletions
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1
drivers/nvme/host/pci.c
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@@ -2003,6 +2003,7 @@ static void nvme_map_cmb(struct nvme_dev *dev)
if (pci_p2pdma_add_resource(pdev, bar, size, offset)) {
dev_warn(dev->ctrl.device,
"failed to register the CMB\n");
hi_lo_writeq(0, dev->bar + NVME_REG_CMBMSC);
return;
}