The patch titled
pnp: make resource assignment functions return 0 (success) or -EBUSY (failure)
has been added to the -mm tree. Its filename is
pnp-make-resource-assignment-functions-return-0-success-or-ebusy-failure.patch
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------------------------------------------------------
Subject: pnp: make resource assignment functions return 0 (success) or -EBUSY (failure)
From: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
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@xxxxxx>
Acked-by: Rene Herman <rene.herman@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Adam M Belay <abelay@xxxxxxx>
Cc: Li Shaohua <shaohua.li@xxxxxxxxx>
Cc: Matthieu Castet <castet.matthieu@xxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Cc: Jaroslav Kysela <perex@xxxxxxxx>
Cc: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pnp/manager.c | 41 +++++++++++++++++++++-------------------
1 file changed, 22 insertions(+), 19 deletions(-)
diff -puN drivers/pnp/manager.c~pnp-make-resource-assignment-functions-return-0-success-or-ebusy-failure drivers/pnp/manager.c
--- a/drivers/pnp/manager.c~pnp-make-resource-assignment-functions-return-0-success-or-ebusy-failure
+++ a/drivers/pnp/manager.c
@@ -26,7 +26,7 @@ static int pnp_assign_port(struct pnp_de
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_de
"(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_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
"(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
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_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_de
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_de
__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 p
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 p
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;
}
_
Patches currently in -mm which might be from bjorn.helgaas@xxxxxx are
pnp-mark-resources-that-conflict-with-pci-devices-disabled.patch
acpi_pm_device_sleep_state-cleanup.patch
mm-only-enforce-acpi-resource-conflict-checks.patch
provide-rtc_cmos-platform-device-take-2.patch
acpi-fix-drivers-acpi-gluec-build-error.patch
pnpacpi-fix-irq-flag-decoding.patch
pnpacpi-fix-irq-flag-decoding-comment-fix.patch
pnpacpi-fix-shareable-irq-encode-decode.patch
pnpacpi-use-_crs-irq-descriptor-length-for-_srs-v2.patch
pnp-add-detail-to-debug-resource-dump.patch
pnp-remove-pnp_resourceindex.patch
pnp-add-pnp_resource_type-internal-interface.patch
pnp-add-pnp_resource_type_name-helper-function.patch
pnp-make-pnp_portmemetc_start-et-al-work-for-invalid-resources.patch
pnp-replace-pnp_resource_table-with-dynamically-allocated-resources.patch
pnp-replace-pnp_resource_table-with-dynamically-allocated-resources-merge-fix.patch
pnp-remove-ratelimit-on-add-resource-failures.patch
pnp-dont-sort-by-type-in-sys-resources.patch
pnp-set-the-pnp_card-dma_mask-for-use-by-isapnp-cards.patch
isa-set-24-bit-dma_mask-for-isa-devices.patch
pnp-add-pnp_possible_config-can-a-device-could-be-configured-this-way.patch
pnp-whitespace-coding-style-fixes.patch
pnp-define-pnp-specific-ioresource_io_-flags-alongside-irq-dma-mem.patch
pnp-make-resource-option-structures-private-to-pnp-subsystem.patch
pnp-introduce-pnp_irq_mask_t-typedef.patch
pnp-increase-i-o-port-memory-option-address-sizes.patch
pnp-improve-resource-assignment-debug.patch
pnp-in-debug-resource-dump-make-empty-list-obvious.patch
pnp-make-resource-assignment-functions-return-0-success-or-ebusy-failure.patch
pnp-remove-redundant-pnp_can_configure-check.patch
pnp-centralize-resource-option-allocations.patch
pnpacpi-ignore-_prs-interrupt-numbers-larger-than-pnp_irq_nr.patch
pnp-rename-pnp_register__resource-local-variables.patch
pnp-support-optional-irq-resources.patch
pnp-remove-extra-0x100-bit-from-option-priority.patch
isapnp-handle-independent-options-following-dependent-ones.patch
pnp-convert-resource-options-to-single-linked-list.patch
make-pnp_add_card_id-static.patch
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