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Commit 8533ee31 authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

pcmcia: lock ops->set_io_map() 



As a side effect,
	io_window_t			io[MAX_IO_WIN];
is explicitely protected now.

Tested-by: default avatarWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 8680c4b3

drivers/pcmcia/pcmcia_resource.c

+10 −0
Original line number Diff line number Diff line
@@ -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;