[PATCH] cxl: Set the valid bit in PE for dedicated mode

From: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org,
	Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Cc: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>,
	Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
	Christophe Lombard <christophe_lombard@fr.ibm.com>,
	Philippe Bergheaud <philippe.bergheaud@fr.ibm.com>,
	"Alastair D'Silva" <alastair@au1.ibm.com>
Subject: [PATCH] cxl: Set the valid bit in PE for dedicated mode
Date: Mon, 28 Aug 2017 09:45:22 +0530	[thread overview]
Message-ID: <20170828041522.32188-1-vaibhav@linux.vnet.ibm.com> (raw)

Make sure to set the valid-bit in software-state field of the
populated PE. This was earlier missing for dedicated mode AFUs, hence
was causing a PSL freeze when the AFU was activated.

Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
---
 drivers/misc/cxl/native.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index 4a82c313cf71..0e748c682ee9 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -897,6 +897,10 @@ int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr)
 	if (ctx->afu->adapter->native->sl_ops->update_dedicated_ivtes)
 		afu->adapter->native->sl_ops->update_dedicated_ivtes(ctx);
 
+	ctx->elem->software_state = cpu_to_be32(CXL_PE_SOFTWARE_STATE_V);
+	/* Make sure the changes to the PE are visible to the card */
+	smp_wmb();
+
 	result = cxl_ops->afu_reset(afu);
 	if (result)
 		return result;
-- 
2.13.5
