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-rw-r--r--debian/patches-rt/0232-scsi-fcoe-Make-RT-aware.patch116
1 files changed, 116 insertions, 0 deletions
diff --git a/debian/patches-rt/0232-scsi-fcoe-Make-RT-aware.patch b/debian/patches-rt/0232-scsi-fcoe-Make-RT-aware.patch
new file mode 100644
index 000000000..dbe99481a
--- /dev/null
+++ b/debian/patches-rt/0232-scsi-fcoe-Make-RT-aware.patch
@@ -0,0 +1,116 @@
+From a2eaf0c262e1151f5978da03d033819e82104cce Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Sat, 12 Nov 2011 14:00:48 +0100
+Subject: [PATCH 232/323] scsi/fcoe: Make RT aware.
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+Do not disable preemption while taking sleeping locks. All user look safe
+for migrate_diable() only.
+
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+---
+ drivers/scsi/fcoe/fcoe.c | 16 ++++++++--------
+ drivers/scsi/fcoe/fcoe_ctlr.c | 4 ++--
+ drivers/scsi/libfc/fc_exch.c | 4 ++--
+ 3 files changed, 12 insertions(+), 12 deletions(-)
+
+diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
+index 30afcbbe1f86..4ae5b8152ece 100644
+--- a/drivers/scsi/fcoe/fcoe.c
++++ b/drivers/scsi/fcoe/fcoe.c
+@@ -1452,11 +1452,11 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
+ static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
+ {
+ struct fcoe_percpu_s *fps;
+- int rc;
++ int rc, cpu = get_cpu_light();
+
+- fps = &get_cpu_var(fcoe_percpu);
++ fps = &per_cpu(fcoe_percpu, cpu);
+ rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
+- put_cpu_var(fcoe_percpu);
++ put_cpu_light();
+
+ return rc;
+ }
+@@ -1641,11 +1641,11 @@ static inline int fcoe_filter_frames(struct fc_lport *lport,
+ return 0;
+ }
+
+- stats = per_cpu_ptr(lport->stats, get_cpu());
++ stats = per_cpu_ptr(lport->stats, get_cpu_light());
+ stats->InvalidCRCCount++;
+ if (stats->InvalidCRCCount < 5)
+ printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
+- put_cpu();
++ put_cpu_light();
+ return -EINVAL;
+ }
+
+@@ -1686,7 +1686,7 @@ static void fcoe_recv_frame(struct sk_buff *skb)
+ */
+ hp = (struct fcoe_hdr *) skb_network_header(skb);
+
+- stats = per_cpu_ptr(lport->stats, get_cpu());
++ stats = per_cpu_ptr(lport->stats, get_cpu_light());
+ if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+ if (stats->ErrorFrames < 5)
+ printk(KERN_WARNING "fcoe: FCoE version "
+@@ -1718,13 +1718,13 @@ static void fcoe_recv_frame(struct sk_buff *skb)
+ goto drop;
+
+ if (!fcoe_filter_frames(lport, fp)) {
+- put_cpu();
++ put_cpu_light();
+ fc_exch_recv(lport, fp);
+ return;
+ }
+ drop:
+ stats->ErrorFrames++;
+- put_cpu();
++ put_cpu_light();
+ kfree_skb(skb);
+ }
+
+diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
+index a2d60ad2a683..3fdc403bc7d8 100644
+--- a/drivers/scsi/fcoe/fcoe_ctlr.c
++++ b/drivers/scsi/fcoe/fcoe_ctlr.c
+@@ -830,7 +830,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
+
+ INIT_LIST_HEAD(&del_list);
+
+- stats = per_cpu_ptr(fip->lp->stats, get_cpu());
++ stats = per_cpu_ptr(fip->lp->stats, get_cpu_light());
+
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
+@@ -866,7 +866,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
+ sel_time = fcf->time;
+ }
+ }
+- put_cpu();
++ put_cpu_light();
+
+ list_for_each_entry_safe(fcf, next, &del_list, list) {
+ /* Removes fcf from current list */
+diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
+index 4261380af97b..65160eaaa929 100644
+--- a/drivers/scsi/libfc/fc_exch.c
++++ b/drivers/scsi/libfc/fc_exch.c
+@@ -826,10 +826,10 @@ static struct fc_exch *fc_exch_em_alloc(struct fc_lport *lport,
+ }
+ memset(ep, 0, sizeof(*ep));
+
+- cpu = get_cpu();
++ cpu = get_cpu_light();
+ pool = per_cpu_ptr(mp->pool, cpu);
+ spin_lock_bh(&pool->lock);
+- put_cpu();
++ put_cpu_light();
+
+ /* peek cache of free slot */
+ if (pool->left != FC_XID_UNKNOWN) {
+--
+2.43.0
+