diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2010-01-12 23:52:19 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2010-02-17 17:48:15 +0100 |
| commit | 8533ee31cdc08fc1f2533e5f21f8e4abf6a57dfc (patch) | |
| tree | 5f8e21433e945e482b3422eecd8a7a1f8e88897a /drivers | |
| parent | 8680c4b3faa298dc768c2a78a94a84d89854eca9 (diff) | |
pcmcia: lock ops->set_io_map()
As a side effect,
io_window_t io[MAX_IO_WIN];
is explicitely protected now.
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pcmcia/pcmcia_resource.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c index f31ba89e40d..4e0aaec5cf9 100644 --- a/drivers/pcmcia/pcmcia_resource.c +++ b/drivers/pcmcia/pcmcia_resource.c @@ -306,6 +306,7 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, int i; io_on.speed = io_speed; + mutex_lock(&s->ops_mutex); for (i = 0; i < MAX_IO_WIN; i++) { if (!s->io[i].res) continue; @@ -320,6 +321,7 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, mdelay(40); s->ops->set_io_map(s, &io_on); } + mutex_unlock(&s->ops_mutex); } return 0; @@ -345,6 +347,7 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev) } if (c->state & CONFIG_LOCKED) { c->state &= ~CONFIG_LOCKED; + mutex_lock(&s->ops_mutex); if (c->state & CONFIG_IO_REQ) for (i = 0; i < MAX_IO_WIN; i++) { if (!s->io[i].res) @@ -355,6 +358,7 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev) io.map = i; s->ops->set_io_map(s, &io); } + mutex_unlock(&s->ops_mutex); } return 0; @@ -562,6 +566,7 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev, /* Configure I/O windows */ if (c->state & CONFIG_IO_REQ) { + mutex_lock(&s->ops_mutex); iomap.speed = io_speed; for (i = 0; i < MAX_IO_WIN; i++) if (s->io[i].res) { @@ -580,6 +585,7 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev, s->ops->set_io_map(s, &iomap); s->io[i].Config++; } + mutex_unlock(&s->ops_mutex); } c->state |= CONFIG_LOCKED; @@ -625,10 +631,12 @@ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) return -EINVAL; } + mutex_lock(&s->ops_mutex); dev_dbg(&s->dev, "trying to allocate resource 1\n"); if (alloc_io_space(s, req->Attributes1, &req->BasePort1, req->NumPorts1, req->IOAddrLines)) { dev_dbg(&s->dev, "allocation of resource 1 failed\n"); + mutex_unlock(&s->ops_mutex); return -EBUSY; } @@ -638,9 +646,11 @@ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) req->NumPorts2, req->IOAddrLines)) { dev_dbg(&s->dev, "allocation of resource 2 failed\n"); release_io_space(s, req->BasePort1, req->NumPorts1); + mutex_unlock(&s->ops_mutex); return -EBUSY; } } + mutex_unlock(&s->ops_mutex); c->io = *req; c->state |= CONFIG_IO_REQ; |