From 94a819f80297e1f635a7cde4ed5317612e512ba7 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Sun, 17 Jan 2010 18:31:34 +0100 Subject: pcmcia: assert locking to struct pcmcia_device Tested-by: Wolfram Sang Signed-off-by: Dominik Brodowski --- drivers/pcmcia/pcmcia_resource.c | 122 ++++++++++++++++++++++++--------------- 1 file changed, 77 insertions(+), 45 deletions(-) (limited to 'drivers/pcmcia/pcmcia_resource.c') diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c index f0de7b8b123b..b2df04199a21 100644 --- a/drivers/pcmcia/pcmcia_resource.c +++ b/drivers/pcmcia/pcmcia_resource.c @@ -191,14 +191,18 @@ int pcmcia_access_configuration_register(struct pcmcia_device *p_dev, return -EINVAL; s = p_dev->socket; + + mutex_lock(&s->ops_mutex); c = p_dev->function_config; if (!(c->state & CONFIG_LOCKED)) { dev_dbg(&s->dev, "Configuration isnt't locked\n"); + mutex_unlock(&s->ops_mutex); return -EACCES; } addr = (c->ConfigBase + reg->Offset) >> 1; + mutex_unlock(&s->ops_mutex); switch (reg->Action) { case CS_READ: @@ -254,19 +258,22 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, config_t *c; s = p_dev->socket; + + mutex_lock(&s->ops_mutex); c = p_dev->function_config; if (!(s->state & SOCKET_PRESENT)) { dev_dbg(&s->dev, "No card present\n"); + mutex_unlock(&s->ops_mutex); return -ENODEV; } if (!(c->state & CONFIG_LOCKED)) { dev_dbg(&s->dev, "Configuration isnt't locked\n"); + mutex_unlock(&s->ops_mutex); return -EACCES; } if (mod->Attributes & CONF_IRQ_CHANGE_VALID) { - mutex_lock(&s->ops_mutex); if (mod->Attributes & CONF_ENABLE_IRQ) { c->Attributes |= CONF_ENABLE_IRQ; s->socket.io_irq = s->irq.AssignedIRQ; @@ -275,7 +282,6 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, s->socket.io_irq = 0; } s->ops->set_socket(s, &s->socket); - mutex_unlock(&s->ops_mutex); } if (mod->Attributes & CONF_VCC_CHANGE_VALID) { @@ -288,9 +294,9 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { if (mod->Vpp1 != mod->Vpp2) { dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n"); + mutex_unlock(&s->ops_mutex); return -EINVAL; } - mutex_lock(&s->ops_mutex); s->socket.Vpp = mod->Vpp1; if (s->ops->set_socket(s, &s->socket)) { mutex_unlock(&s->ops_mutex); @@ -298,10 +304,10 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, "Unable to set VPP\n"); return -EIO; } - mutex_unlock(&s->ops_mutex); } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) || (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n"); + mutex_unlock(&s->ops_mutex); return -EINVAL; } @@ -311,7 +317,6 @@ 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; @@ -326,8 +331,8 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, mdelay(40); s->ops->set_io_map(s, &io_on); } - mutex_unlock(&s->ops_mutex); } + mutex_unlock(&s->ops_mutex); return 0; } /* modify_configuration */ @@ -338,10 +343,11 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev) { pccard_io_map io = { 0, 0, 0, 0, 1 }; struct pcmcia_socket *s = p_dev->socket; - config_t *c = p_dev->function_config; + config_t *c; int i; mutex_lock(&s->ops_mutex); + c = p_dev->function_config; if (p_dev->_locked) { p_dev->_locked = 0; if (--(s->lock_count) == 0) { @@ -381,10 +387,14 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev) static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req) { struct pcmcia_socket *s = p_dev->socket; - config_t *c = p_dev->function_config; + int ret = -EINVAL; + config_t *c; + + mutex_lock(&s->ops_mutex); + c = p_dev->function_config; if (!p_dev->_io) - return -EINVAL; + goto out; p_dev->_io = 0; @@ -392,7 +402,7 @@ static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req) (c->io.NumPorts1 != req->NumPorts1) || (c->io.BasePort2 != req->BasePort2) || (c->io.NumPorts2 != req->NumPorts2)) - return -EINVAL; + goto out; c->state &= ~CONFIG_IO_REQ; @@ -400,30 +410,38 @@ static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req) if (req->NumPorts2) release_io_space(s, req->BasePort2, req->NumPorts2); - return 0; +out: + mutex_unlock(&s->ops_mutex); + + return ret; } /* pcmcia_release_io */ static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) { struct pcmcia_socket *s = p_dev->socket; - config_t *c = p_dev->function_config; + config_t *c; + int ret = -EINVAL; + + mutex_lock(&s->ops_mutex); + + c = p_dev->function_config; if (!p_dev->_irq) - return -EINVAL; + goto out; + p_dev->_irq = 0; if (c->state & CONFIG_LOCKED) - return -EACCES; + goto out; + if (c->irq.Attributes != req->Attributes) { dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n"); - return -EINVAL; + goto out; } - mutex_lock(&s->ops_mutex); if (s->irq.AssignedIRQ != req->AssignedIRQ) { - mutex_unlock(&s->ops_mutex); dev_dbg(&s->dev, "IRQ must match assigned one\n"); - return -EINVAL; + goto out; } if (--s->irq.Config == 0) { c->state &= ~CONFIG_IRQ_REQ; @@ -436,9 +454,12 @@ static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) #ifdef CONFIG_PCMCIA_PROBE pcmcia_used_irq[req->AssignedIRQ]--; #endif + ret = 0; + +out: mutex_unlock(&s->ops_mutex); - return 0; + return ret; } /* pcmcia_release_irq */ @@ -495,13 +516,15 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev, dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n"); return -EINVAL; } + + mutex_lock(&s->ops_mutex); c = p_dev->function_config; if (c->state & CONFIG_LOCKED) { + mutex_unlock(&s->ops_mutex); dev_dbg(&s->dev, "Configuration is locked\n"); return -EACCES; } - mutex_lock(&s->ops_mutex); /* Do power control. We don't allow changes in Vcc. */ s->socket.Vpp = req->Vpp; if (s->ops->set_socket(s, &s->socket)) { @@ -615,58 +638,65 @@ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) { struct pcmcia_socket *s = p_dev->socket; config_t *c; + int ret = -EINVAL; + + mutex_lock(&s->ops_mutex); if (!(s->state & SOCKET_PRESENT)) { dev_dbg(&s->dev, "No card present\n"); - return -ENODEV; + goto out; } if (!req) - return -EINVAL; + goto out; + c = p_dev->function_config; if (c->state & CONFIG_LOCKED) { dev_dbg(&s->dev, "Configuration is locked\n"); - return -EACCES; + goto out; } if (c->state & CONFIG_IO_REQ) { dev_dbg(&s->dev, "IO already configured\n"); - return -EBUSY; + goto out; } if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) { dev_dbg(&s->dev, "bad attribute setting for IO region 1\n"); - return -EINVAL; + goto out; } if ((req->NumPorts2 > 0) && (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) { dev_dbg(&s->dev, "bad attribute setting for IO region 2\n"); - return -EINVAL; + goto out; } - 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)) { + ret = alloc_io_space(s, req->Attributes1, &req->BasePort1, + req->NumPorts1, req->IOAddrLines); + if (ret) { dev_dbg(&s->dev, "allocation of resource 1 failed\n"); - mutex_unlock(&s->ops_mutex); - return -EBUSY; + goto out; } if (req->NumPorts2) { dev_dbg(&s->dev, "trying to allocate resource 2\n"); - if (alloc_io_space(s, req->Attributes2, &req->BasePort2, - req->NumPorts2, req->IOAddrLines)) { + ret = alloc_io_space(s, req->Attributes2, &req->BasePort2, + req->NumPorts2, req->IOAddrLines); + if (ret) { 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; + goto out; } } - mutex_unlock(&s->ops_mutex); c->io = *req; c->state |= CONFIG_IO_REQ; p_dev->_io = 1; - return 0; + dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret); + +out: + mutex_unlock(&s->ops_mutex); + + return ret; } /* pcmcia_request_io */ EXPORT_SYMBOL(pcmcia_request_io); @@ -695,21 +725,22 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) int ret = -EINVAL, irq = 0; int type; + mutex_lock(&s->ops_mutex); + if (!(s->state & SOCKET_PRESENT)) { dev_dbg(&s->dev, "No card present\n"); - return -ENODEV; + goto out; } c = p_dev->function_config; if (c->state & CONFIG_LOCKED) { dev_dbg(&s->dev, "Configuration is locked\n"); - return -EACCES; + goto out; } if (c->state & CONFIG_IRQ_REQ) { dev_dbg(&s->dev, "IRQ already configured\n"); - return -EBUSY; + goto out; } - mutex_lock(&s->ops_mutex); /* Decide what type of interrupt we are registering */ type = 0; if (s->functions > 1) /* All of this ought to be handled higher up */ @@ -768,7 +799,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) if (ret && !s->irq.AssignedIRQ) { if (!s->pci_irq) { dev_printk(KERN_INFO, &s->dev, "no IRQ found\n"); - return ret; + goto out; } type = IRQF_SHARED; irq = s->pci_irq; @@ -780,7 +811,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) if (ret) { dev_printk(KERN_INFO, &s->dev, "request_irq() failed\n"); - return ret; + goto out; } } @@ -803,9 +834,10 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) pcmcia_used_irq[irq]++; #endif + ret = 0; +out: mutex_unlock(&s->ops_mutex); - - return 0; + return ret; } /* pcmcia_request_irq */ EXPORT_SYMBOL(pcmcia_request_irq); -- cgit v1.2.2