From 4d1ff582246de67b15e3cd2427a39875943ae895 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 16 Oct 2007 01:27:50 -0700 Subject: [PATCH] gigaset: remove pointless locking Remove pointless taking of spinlock around reading a single pointer-sized or smaller variable. Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/isdn/gigaset/bas-gigaset.c | 9 +-------- drivers/isdn/gigaset/i4l.c | 12 ++---------- drivers/isdn/gigaset/proc.c | 8 +------- drivers/isdn/gigaset/usb-gigaset.c | 7 ------- 4 files changed, 4 insertions(+), 32 deletions(-) diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index 00e31609a2..af7648274b 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -1936,14 +1936,7 @@ static int gigaset_write_room(struct cardstate *cs) */ static int gigaset_chars_in_buffer(struct cardstate *cs) { - unsigned long flags; - unsigned bytes; - - spin_lock_irqsave(&cs->cmdlock, flags); - bytes = cs->cmdbytes; - spin_unlock_irqrestore(&cs->cmdlock, flags); - - return bytes; + return cs->cmdbytes; } /* gigaset_brkchars diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index 1654fa4135..9e089f06a9 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -109,13 +109,9 @@ EXPORT_SYMBOL_GPL(gigaset_skb_sent); static int command_from_LL(isdn_ctrl *cntrl) { struct cardstate *cs = gigaset_get_cs_by_id(cntrl->driver); - //isdn_ctrl response; - //unsigned long flags; struct bc_state *bcs; int retval = 0; struct setup_parm *sp; - unsigned param; - unsigned long flags; gigaset_debugdrivers(); @@ -162,12 +158,8 @@ static int command_from_LL(isdn_ctrl *cntrl) } *sp = cntrl->parm.setup; - spin_lock_irqsave(&cs->lock, flags); - param = bcs->at_state.seq_index; - spin_unlock_irqrestore(&cs->lock, flags); - - if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp, param, - NULL)) { + if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp, + bcs->at_state.seq_index, NULL)) { //FIXME what should we do? kfree(sp); gigaset_free_channel(bcs); diff --git a/drivers/isdn/gigaset/proc.c b/drivers/isdn/gigaset/proc.c index e767afa55a..da6f3acf9f 100644 --- a/drivers/isdn/gigaset/proc.c +++ b/drivers/isdn/gigaset/proc.c @@ -19,15 +19,9 @@ static ssize_t show_cidmode(struct device *dev, struct device_attribute *attr, char *buf) { - int ret; - unsigned long flags; struct cardstate *cs = dev_get_drvdata(dev); - spin_lock_irqsave(&cs->lock, flags); - ret = sprintf(buf, "%u\n", cs->cidmode); - spin_unlock_irqrestore(&cs->lock, flags); - - return ret; + return sprintf(buf, "%u\n", cs->cidmode); } static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c index a1263019df..ca4bee173c 100644 --- a/drivers/isdn/gigaset/usb-gigaset.c +++ b/drivers/isdn/gigaset/usb-gigaset.c @@ -310,7 +310,6 @@ static void gigaset_modem_fill(unsigned long data) struct cardstate *cs = (struct cardstate *) data; struct bc_state *bcs = &cs->bcs[0]; /* only one channel */ struct cmdbuf_t *cb; - unsigned long flags; int again; gig_dbg(DEBUG_OUTPUT, "modem_fill"); @@ -323,9 +322,7 @@ static void gigaset_modem_fill(unsigned long data) do { again = 0; if (!bcs->tx_skb) { /* no skb is being sent */ - spin_lock_irqsave(&cs->cmdlock, flags); cb = cs->cmdbuf; - spin_unlock_irqrestore(&cs->cmdlock, flags); if (cb) { /* commands to send? */ gig_dbg(DEBUG_OUTPUT, "modem_fill: cb"); if (send_cb(cs, cb) < 0) { @@ -546,13 +543,9 @@ static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf, static int gigaset_write_room(struct cardstate *cs) { - unsigned long flags; unsigned bytes; - spin_lock_irqsave(&cs->cmdlock, flags); bytes = cs->cmdbytes; - spin_unlock_irqrestore(&cs->cmdlock, flags); - return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0; } -- 2.39.5