diff options
Diffstat (limited to 'drivers/net/ppp_generic.c')
| -rw-r--r-- | drivers/net/ppp_generic.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c index f608c12e3e8..b2073fce821 100644 --- a/drivers/net/ppp_generic.c +++ b/drivers/net/ppp_generic.c @@ -46,6 +46,7 @@ #include <linux/rwsem.h> #include <linux/stddef.h> #include <linux/device.h> +#include <linux/mutex.h> #include <net/slhc_vj.h> #include <asm/atomic.h> @@ -198,11 +199,11 @@ static unsigned int cardmap_find_first_free(struct cardmap *map); static void cardmap_destroy(struct cardmap **map); /* - * all_ppp_sem protects the all_ppp_units mapping. + * all_ppp_mutex protects the all_ppp_units mapping. * It also ensures that finding a ppp unit in the all_ppp_units map * and updating its file.refcnt field is atomic. */ -static DECLARE_MUTEX(all_ppp_sem); +static DEFINE_MUTEX(all_ppp_mutex); static struct cardmap *all_ppp_units; static atomic_t ppp_unit_count = ATOMIC_INIT(0); @@ -804,7 +805,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct file *file, /* Attach to an existing ppp unit */ if (get_user(unit, p)) break; - down(&all_ppp_sem); + mutex_lock(&all_ppp_mutex); err = -ENXIO; ppp = ppp_find_unit(unit); if (ppp != 0) { @@ -812,7 +813,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct file *file, file->private_data = &ppp->file; err = 0; } - up(&all_ppp_sem); + mutex_unlock(&all_ppp_mutex); break; case PPPIOCATTCHAN: @@ -2446,7 +2447,7 @@ ppp_create_interface(int unit, int *retp) dev->do_ioctl = ppp_net_ioctl; ret = -EEXIST; - down(&all_ppp_sem); + mutex_lock(&all_ppp_mutex); if (unit < 0) unit = cardmap_find_first_free(all_ppp_units); else if (cardmap_get(all_ppp_units, unit) != NULL) @@ -2465,12 +2466,12 @@ ppp_create_interface(int unit, int *retp) atomic_inc(&ppp_unit_count); cardmap_set(&all_ppp_units, unit, ppp); - up(&all_ppp_sem); + mutex_unlock(&all_ppp_mutex); *retp = 0; return ppp; out2: - up(&all_ppp_sem); + mutex_unlock(&all_ppp_mutex); free_netdev(dev); out1: kfree(ppp); @@ -2500,7 +2501,7 @@ static void ppp_shutdown_interface(struct ppp *ppp) { struct net_device *dev; - down(&all_ppp_sem); + mutex_lock(&all_ppp_mutex); ppp_lock(ppp); dev = ppp->dev; ppp->dev = NULL; @@ -2514,7 +2515,7 @@ static void ppp_shutdown_interface(struct ppp *ppp) ppp->file.dead = 1; ppp->owner = NULL; wake_up_interruptible(&ppp->file.rwait); - up(&all_ppp_sem); + mutex_unlock(&all_ppp_mutex); } /* @@ -2556,7 +2557,7 @@ static void ppp_destroy_interface(struct ppp *ppp) /* * Locate an existing ppp unit. - * The caller should have locked the all_ppp_sem. + * The caller should have locked the all_ppp_mutex. */ static struct ppp * ppp_find_unit(int unit) @@ -2601,7 +2602,7 @@ ppp_connect_channel(struct channel *pch, int unit) int ret = -ENXIO; int hdrlen; - down(&all_ppp_sem); + mutex_lock(&all_ppp_mutex); ppp = ppp_find_unit(unit); if (ppp == 0) goto out; @@ -2626,7 +2627,7 @@ ppp_connect_channel(struct channel *pch, int unit) outl: write_unlock_bh(&pch->upl); out: - up(&all_ppp_sem); + mutex_unlock(&all_ppp_mutex); return ret; } |