From da39fe781d9618b7363d53603c79fa1f4c96474d Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sat, 12 Nov 2011 14:00:48 +0100 Subject: [PATCH 092/158] scsi/fcoe: Make RT aware. Do not disable preemption while taking sleeping locks. All user look safe for migrate_diable() only. Signed-off-by: Thomas Gleixner --- 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(-) Index: linux-5.15.19-rt29/drivers/scsi/fcoe/fcoe.c =================================================================== --- linux-5.15.19-rt29.orig/drivers/scsi/fcoe/fcoe.c +++ linux-5.15.19-rt29/drivers/scsi/fcoe/fcoe.c @@ -1450,11 +1450,11 @@ err2: 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; } @@ -1639,11 +1639,11 @@ static inline int fcoe_filter_frames(str 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; } @@ -1684,7 +1684,7 @@ static void fcoe_recv_frame(struct sk_bu */ 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 " @@ -1716,13 +1716,13 @@ static void fcoe_recv_frame(struct sk_bu 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); } Index: linux-5.15.19-rt29/drivers/scsi/fcoe/fcoe_ctlr.c =================================================================== --- linux-5.15.19-rt29.orig/drivers/scsi/fcoe/fcoe_ctlr.c +++ linux-5.15.19-rt29/drivers/scsi/fcoe/fcoe_ctlr.c @@ -828,7 +828,7 @@ static unsigned long fcoe_ctlr_age_fcfs( 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; @@ -864,7 +864,7 @@ static unsigned long fcoe_ctlr_age_fcfs( sel_time = fcf->time; } } - put_cpu(); + put_cpu_light(); list_for_each_entry_safe(fcf, next, &del_list, list) { /* Removes fcf from current list */ Index: linux-5.15.19-rt29/drivers/scsi/libfc/fc_exch.c =================================================================== --- linux-5.15.19-rt29.orig/drivers/scsi/libfc/fc_exch.c +++ linux-5.15.19-rt29/drivers/scsi/libfc/fc_exch.c @@ -825,10 +825,10 @@ static struct fc_exch *fc_exch_em_alloc( } 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) {