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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-06-27 16:57:09 -0600
committerAndi Kleen <andi@basil.nowhere.org>2008-07-16 23:27:07 +0200
commit6e906f0e1c8633ed357a64e9861f1822789bee3d (patch)
treec28af871686799724ebdbc335cecfee639d713bb /drivers
parent819beac3806a5e986d81f476b999b7fffce1a233 (diff)
downloadlinux-linaro-stable-6e906f0e1c8633ed357a64e9861f1822789bee3d.tar.gz
PNP: make resource assignment functions return 0 (success) or -EBUSY (failure)
This patch doesn't change any behavior; it just makes the return values more conventional. This changes pnp_assign_dma() from a void function to one that returns an int, just like the other assignment functions. For now, at least, pnp_assign_dma() always returns 0 (success), so it appears to never fail, just like before. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rene Herman <rene.herman@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pnp/manager.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
index c706dd2ddb02..1adc83fdabb6 100644
--- a/drivers/pnp/manager.c
+++ b/drivers/pnp/manager.c
@@ -26,7 +26,7 @@ static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
dev_dbg(&dev->dev, " io %d already set to %#llx-%#llx "
"flags %#lx\n", idx, (unsigned long long) res->start,
(unsigned long long) res->end, res->flags);
- return 1;
+ return 0;
}
res = &local_res;
@@ -51,13 +51,13 @@ static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
"(min %#llx max %#llx)\n", idx,
(unsigned long long) rule->min,
(unsigned long long) rule->max);
- return 0;
+ return -EBUSY;
}
}
__add:
pnp_add_io_resource(dev, res->start, res->end, res->flags);
- return 1;
+ return 0;
}
static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
@@ -69,7 +69,7 @@ static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
dev_dbg(&dev->dev, " mem %d already set to %#llx-%#llx "
"flags %#lx\n", idx, (unsigned long long) res->start,
(unsigned long long) res->end, res->flags);
- return 1;
+ return 0;
}
res = &local_res;
@@ -103,13 +103,13 @@ static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
"(min %#llx max %#llx)\n", idx,
(unsigned long long) rule->min,
(unsigned long long) rule->max);
- return 0;
+ return -EBUSY;
}
}
__add:
pnp_add_mem_resource(dev, res->start, res->end, res->flags);
- return 1;
+ return 0;
}
static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
@@ -126,7 +126,7 @@ static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
if (res) {
dev_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n",
idx, (int) res->start, res->flags);
- return 1;
+ return 0;
}
res = &local_res;
@@ -154,14 +154,14 @@ static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
}
}
dev_dbg(&dev->dev, " couldn't assign irq %d\n", idx);
- return 0;
+ return -EBUSY;
__add:
pnp_add_irq_resource(dev, res->start, res->flags);
- return 1;
+ return 0;
}
-static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
+static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
{
struct resource *res, local_res;
int i;
@@ -175,7 +175,7 @@ static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
if (res) {
dev_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n",
idx, (int) res->start, res->flags);
- return;
+ return 0;
}
res = &local_res;
@@ -198,6 +198,7 @@ static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
__add:
pnp_add_dma_resource(dev, res->start, res->flags);
+ return 0;
}
void pnp_init_resources(struct pnp_dev *dev)
@@ -243,25 +244,26 @@ static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
irq = dev->independent->irq;
dma = dev->independent->dma;
while (port) {
- if (!pnp_assign_port(dev, port, nport))
+ if (pnp_assign_port(dev, port, nport) < 0)
goto fail;
nport++;
port = port->next;
}
while (mem) {
- if (!pnp_assign_mem(dev, mem, nmem))
+ if (pnp_assign_mem(dev, mem, nmem) < 0)
goto fail;
nmem++;
mem = mem->next;
}
while (irq) {
- if (!pnp_assign_irq(dev, irq, nirq))
+ if (pnp_assign_irq(dev, irq, nirq) < 0)
goto fail;
nirq++;
irq = irq->next;
}
while (dma) {
- pnp_assign_dma(dev, dma, ndma);
+ if (pnp_assign_dma(dev, dma, ndma) < 0)
+ goto fail;
ndma++;
dma = dma->next;
}
@@ -281,25 +283,26 @@ static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
irq = dep->irq;
dma = dep->dma;
while (port) {
- if (!pnp_assign_port(dev, port, nport))
+ if (pnp_assign_port(dev, port, nport) < 0)
goto fail;
nport++;
port = port->next;
}
while (mem) {
- if (!pnp_assign_mem(dev, mem, nmem))
+ if (pnp_assign_mem(dev, mem, nmem) < 0)
goto fail;
nmem++;
mem = mem->next;
}
while (irq) {
- if (!pnp_assign_irq(dev, irq, nirq))
+ if (pnp_assign_irq(dev, irq, nirq) < 0)
goto fail;
nirq++;
irq = irq->next;
}
while (dma) {
- pnp_assign_dma(dev, dma, ndma);
+ if (pnp_assign_dma(dev, dma, ndma) < 0)
+ goto fail;
ndma++;
dma = dma->next;
}