nvme-pci: set virt boundary according to capability

mgurtovoy · kawasaki · commit c35b8d776d0a · 2025-12-09T07:38:45.000+09:00
Some controllers advertise DWORD alignment for SGLs, so configure the
virtual boundary correctly for those devices.

Signed-off-by: Max Gurtovoy &lt;mgurtovoy@nvidia.com&gt;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
@@ -3326,7 +3326,9 @@ static unsigned long nvme_pci_get_virt_boundary(struct nvme_ctrl *ctrl,
 {
 	if (!nvme_ctrl_sgl_supported(ctrl) || is_admin)
 		return NVME_CTRL_PAGE_SIZE - 1;
-	return 0;
+	else if (ctrl->sgls & NVME_CTRL_SGLS_BYTE_ALIGNED)
+		return 0;
+	return 3;
 }
 
 static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {

Original file line number	Diff line number	Diff line change
`@@ -3326,7 +3326,9 @@ static unsigned long nvme_pci_get_virt_boundary(struct nvme_ctrl *ctrl,`
`3326`	`3326`	`{`
`3327`	`3327`	`if (!nvme_ctrl_sgl_supported(ctrl) \|\| is_admin)`
`3328`	`3328`	`return NVME_CTRL_PAGE_SIZE - 1;`
`3329`		`- return 0;`
	`3329`	`+ else if (ctrl->sgls & NVME_CTRL_SGLS_BYTE_ALIGNED)`
	`3330`	`+ return 0;`
	`3331`	`+ return 3;`
`3330`	`3332`	`}`
`3331`	`3333`
`3332`	`3334`	`static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {`