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>

5 files changed, 56 insertions, 16 deletions

diff --git a/kernel/drivers/scsi/fnic/fnic_debugfs.c b/kernel/drivers/scsi/fnic/fnic_debugfs.c
index 5980c10c7..d6498fabe 100644
--- a/kernel/drivers/scsi/fnic/fnic_debugfs.c
+++ b/kernel/drivers/scsi/fnic/fnic_debugfs.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/debugfs.h>
+#include <linux/vmalloc.h>
 #include "fnic.h"
 
 static struct dentry *fnic_trace_debugfs_root;
diff --git a/kernel/drivers/scsi/fnic/fnic_fcs.c b/kernel/drivers/scsi/fnic/fnic_fcs.c
index bf0bbd42e..67669a9e7 100644
--- a/kernel/drivers/scsi/fnic/fnic_fcs.c
+++ b/kernel/drivers/scsi/fnic/fnic_fcs.c
@@ -939,6 +939,7 @@ int fnic_alloc_rq_frame(struct vnic_rq *rq)
 	struct sk_buff *skb;
 	u16 len;
 	dma_addr_t pa;
+	int r;
 
 	len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 	skb = dev_alloc_skb(len);
@@ -952,8 +953,19 @@ int fnic_alloc_rq_frame(struct vnic_rq *rq)
 	skb_reset_network_header(skb);
 	skb_put(skb, len);
 	pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+
+	r = pci_dma_mapping_error(fnic->pdev, pa);
+	if (r) {
+		printk(KERN_ERR "PCI mapping failed with error %d\n", r);
+		goto free_skb;
+	}
+
 	fnic_queue_rq_desc(rq, skb, pa, len);
 	return 0;
+
+free_skb:
+	kfree_skb(skb);
+	return r;
 }
 
 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
@@ -981,6 +993,7 @@ void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 	struct ethhdr *eth_hdr;
 	struct vlan_ethhdr *vlan_hdr;
 	unsigned long flags;
+	int r;
 
 	if (!fnic->vlan_hw_insert) {
 		eth_hdr = (struct ethhdr *)skb_mac_header(skb);
@@ -1003,18 +1016,27 @@ void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 
 	pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 
-	spin_lock_irqsave(&fnic->wq_lock[0], flags);
-	if (!vnic_wq_desc_avail(wq)) {
-		pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
-		spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
-		kfree_skb(skb);
-		return;
+	r = pci_dma_mapping_error(fnic->pdev, pa);
+	if (r) {
+		printk(KERN_ERR "PCI mapping failed with error %d\n", r);
+		goto free_skb;
 	}
 
+	spin_lock_irqsave(&fnic->wq_lock[0], flags);
+	if (!vnic_wq_desc_avail(wq))
+		goto irq_restore;
+
 	fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
 			       0 /* hw inserts cos value */,
 			       fnic->vlan_id, 1);
 	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+	return;
+
+irq_restore:
+	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+	pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
+free_skb:
+	kfree_skb(skb);
 }
 
 /*
@@ -1071,6 +1093,12 @@ static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
 
 	pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
 
+	ret = pci_dma_mapping_error(fnic->pdev, pa);
+	if (ret) {
+		printk(KERN_ERR "DMA map failed with error %d\n", ret);
+		goto free_skb_on_err;
+	}
+
 	if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
 				(char *)eth_hdr, tot_len)) != 0) {
 		printk(KERN_ERR "fnic ctlr frame trace error!!!");
@@ -1082,15 +1110,17 @@ static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
 		pci_unmap_single(fnic->pdev, pa,
 				 tot_len, PCI_DMA_TODEVICE);
 		ret = -1;
-		goto fnic_send_frame_end;
+		goto irq_restore;
 	}
 
 	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
 			   0 /* hw inserts cos value */,
 			   fnic->vlan_id, 1, 1, 1);
-fnic_send_frame_end:
+
+irq_restore:
 	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
 
+free_skb_on_err:
 	if (ret)
 		dev_kfree_skb_any(fp_skb(fp));
 
diff --git a/kernel/drivers/scsi/fnic/fnic_main.c b/kernel/drivers/scsi/fnic/fnic_main.c
index 8a0d4d7b3..58ce9020d 100644
--- a/kernel/drivers/scsi/fnic/fnic_main.c
+++ b/kernel/drivers/scsi/fnic/fnic_main.c
@@ -118,7 +118,6 @@ static struct scsi_host_template fnic_host_template = {
 	.sg_tablesize = FNIC_MAX_SG_DESC_CNT,
 	.max_sectors = 0xffff,
 	.shost_attrs = fnic_attrs,
-	.use_blk_tags = 1,
 	.track_queue_depth = 1,
 };
 
@@ -697,13 +696,6 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 	fnic->fnic_max_tag_id = host->can_queue;
 
-	err = scsi_init_shared_tag_map(host, fnic->fnic_max_tag_id);
-	if (err) {
-		shost_printk(KERN_ERR, fnic->lport->host,
-			  "Unable to alloc shared tag map\n");
-		goto err_out_dev_close;
-	}
-
 	host->max_lun = fnic->config.luns_per_tgt;
 	host->max_id = FNIC_MAX_FCP_TARGET;
 	host->max_cmd_len = FCOE_MAX_CMD_LEN;
diff --git a/kernel/drivers/scsi/fnic/fnic_scsi.c b/kernel/drivers/scsi/fnic/fnic_scsi.c
index 25436cd28..266b909fe 100644
--- a/kernel/drivers/scsi/fnic/fnic_scsi.c
+++ b/kernel/drivers/scsi/fnic/fnic_scsi.c
@@ -330,6 +330,7 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 	int flags;
 	u8 exch_flags;
 	struct scsi_lun fc_lun;
+	int r;
 
 	if (sg_count) {
 		/* For each SGE, create a device desc entry */
@@ -346,6 +347,12 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 			 io_req->sgl_list,
 			 sizeof(io_req->sgl_list[0]) * sg_count,
 			 PCI_DMA_TODEVICE);
+
+		r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa);
+		if (r) {
+			printk(KERN_ERR "PCI mapping failed with error %d\n", r);
+			return SCSI_MLQUEUE_HOST_BUSY;
+		}
 	}
 
 	io_req->sense_buf_pa = pci_map_single(fnic->pdev,
@@ -353,6 +360,15 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 					      SCSI_SENSE_BUFFERSIZE,
 					      PCI_DMA_FROMDEVICE);
 
+	r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa);
+	if (r) {
+		pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
+				sizeof(io_req->sgl_list[0]) * sg_count,
+				PCI_DMA_TODEVICE);
+		printk(KERN_ERR "PCI mapping failed with error %d\n", r);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
 	int_to_scsilun(sc->device->lun, &fc_lun);
 
 	/* Enqueue the descriptor in the Copy WQ */
diff --git a/kernel/drivers/scsi/fnic/fnic_trace.c b/kernel/drivers/scsi/fnic/fnic_trace.c
index 65a9bde26..4e15c4bf0 100644
--- a/kernel/drivers/scsi/fnic/fnic_trace.c
+++ b/kernel/drivers/scsi/fnic/fnic_trace.c
@@ -21,6 +21,7 @@
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
 #include <linux/time.h>
+#include <linux/vmalloc.h>
 #include "fnic_io.h"
 #include "fnic.h"