These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 23 insertions, 7 deletions

diff --git a/kernel/drivers/crypto/caam/jr.c b/kernel/drivers/crypto/caam/jr.c
index b8b5d47ac..f7e0d8d4c 100644
--- a/kernel/drivers/crypto/caam/jr.c
+++ b/kernel/drivers/crypto/caam/jr.c
@@ -202,6 +202,13 @@ static void caam_jr_dequeue(unsigned long devarg)
 		userdesc = jrp->entinfo[sw_idx].desc_addr_virt;
 		userstatus = jrp->outring[hw_idx].jrstatus;
 
+		/*
+		 * Make sure all information from the job has been obtained
+		 * before telling CAAM that the job has been removed from the
+		 * output ring.
+		 */
+		mb();
+
 		/* set done */
 		wr_reg32(&jrp->rregs->outring_rmvd, 1);
 
@@ -351,12 +358,23 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
 
 	jrp->inpring[jrp->inp_ring_write_index] = desc_dma;
 
+	/*
+	 * Guarantee that the descriptor's DMA address has been written to
+	 * the next slot in the ring before the write index is updated, since
+	 * other cores may update this index independently.
+	 */
 	smp_wmb();
 
 	jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) &
 				    (JOBR_DEPTH - 1);
 	jrp->head = (head + 1) & (JOBR_DEPTH - 1);
 
+	/*
+	 * Ensure that all job information has been written before
+	 * notifying CAAM that a new job was added to the input ring.
+	 */
+	wmb();
+
 	wr_reg32(&jrp->rregs->inpring_jobadd, 1);
 
 	spin_unlock_bh(&jrp->inplock);
@@ -392,18 +410,17 @@ static int caam_jr_init(struct device *dev)
 		goto out_free_irq;
 
 	error = -ENOMEM;
-	jrp->inpring = dma_alloc_coherent(dev, sizeof(dma_addr_t) * JOBR_DEPTH,
-					  &inpbusaddr, GFP_KERNEL);
+	jrp->inpring = dma_alloc_coherent(dev, sizeof(*jrp->inpring) *
+					  JOBR_DEPTH, &inpbusaddr, GFP_KERNEL);
 	if (!jrp->inpring)
 		goto out_free_irq;
 
-	jrp->outring = dma_alloc_coherent(dev, sizeof(struct jr_outentry) *
+	jrp->outring = dma_alloc_coherent(dev, sizeof(*jrp->outring) *
 					  JOBR_DEPTH, &outbusaddr, GFP_KERNEL);
 	if (!jrp->outring)
 		goto out_free_inpring;
 
-	jrp->entinfo = kzalloc(sizeof(struct caam_jrentry_info) * JOBR_DEPTH,
-			       GFP_KERNEL);
+	jrp->entinfo = kcalloc(JOBR_DEPTH, sizeof(*jrp->entinfo), GFP_KERNEL);
 	if (!jrp->entinfo)
 		goto out_free_outring;
 
@@ -461,8 +478,7 @@ static int caam_jr_probe(struct platform_device *pdev)
 	int error;
 
 	jrdev = &pdev->dev;
-	jrpriv = devm_kmalloc(jrdev, sizeof(struct caam_drv_private_jr),
-			      GFP_KERNEL);
+	jrpriv = devm_kmalloc(jrdev, sizeof(*jrpriv), GFP_KERNEL);
 	if (!jrpriv)
 		return -ENOMEM;