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Date: Fri, 8 Jun 2012 17:13:11 -0400
From: Donald Dutile <ddutile@...hat.com>
To: dwmw2@...radead.org
Cc: iommu@...ts.linux-foundation.org, mingo@...nel.org,
linux-kernel@...r.kernel.org, chrisw@...hat.com,
suresh.b.siddha@...el.com
Subject: [PATCH] iommu: dmar: use define to min redundancy in pr_() calls
Joe Perches recommended getting rid of the redundant
formatting of adding "PREFIX" to all the uses of pr_*() calls.
The recommendation helps to reduce source and improve readibility.
While cleaning up the PREFIX's, I saw that one of
the pr_warn() was redundant in dmar_parse_one_dev_scope(),
since the same message was printed after breaking out of the while loop
for the same condition, !pdev.
So, to avoid a duplicate message, I removed the one in the while loop.
This patch applies on top of the 1/2 patch posted previously
to reserve the register space of Intel-IOMMU's.
I didn't squash this patch with the 1/2 patch because Ingo pulled
the first two patches into his tree, it's all bisectable
as is, and this patch is a good demo of how the define can
be used to compact printing info & warning messages.
Reported-by: Joe Perches <joe@...ches.com>
Signed-off-by: Donald Dutile <ddutile@...hat.com>
---
drivers/iommu/dmar.c | 50 ++++++++++++++++++++++----------------------------
1 file changed, 22 insertions(+), 28 deletions(-)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 9ab6ebf..a850bf9 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -26,6 +26,8 @@
* These routines are used by both DMA-remapping and Interrupt-remapping
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* has to precede printk.h */
+
#include <linux/pci.h>
#include <linux/dmar.h>
#include <linux/iova.h>
@@ -39,8 +41,6 @@
#include <asm/irq_remapping.h>
#include <asm/iommu_table.h>
-#define PREFIX "DMAR: "
-
/* No locks are needed as DMA remapping hardware unit
* list is constructed at boot time and hotplug of
* these units are not supported by the architecture.
@@ -83,15 +83,12 @@ static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope,
* ignore it
*/
if (!bus) {
- pr_warn(PREFIX "Device scope bus [%d] not found\n",
- scope->bus);
+ pr_warn("Device scope bus [%d] not found\n", scope->bus);
break;
}
pdev = pci_get_slot(bus, PCI_DEVFN(path->dev, path->fn));
if (!pdev) {
- pr_warn(PREFIX "Device scope device"
- "[%04x:%02x:%02x.%02x] not found\n",
- segment, bus->number, path->dev, path->fn);
+ /* warning will be printed below */
break;
}
path ++;
@@ -99,8 +96,7 @@ static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope,
bus = pdev->subordinate;
}
if (!pdev) {
- pr_warn(PREFIX
- "Device scope device [%04x:%02x:%02x.%02x] not found\n",
+ pr_warn("Device scope device [%04x:%02x:%02x.%02x] not found\n",
segment, scope->bus, path->dev, path->fn);
*dev = NULL;
return 0;
@@ -109,8 +105,8 @@ static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope,
pdev->subordinate) || (scope->entry_type == \
ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) {
pci_dev_put(pdev);
- pr_warn(PREFIX "Device scope type does not match for %s\n",
- pci_name(pdev));
+ pr_warn("Device scope type does not match for %s\n",
+ pci_name(pdev));
return -EINVAL;
}
*dev = pdev;
@@ -132,7 +128,7 @@ int __init dmar_parse_dev_scope(void *start, void *end, int *cnt,
scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE)
(*cnt)++;
else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC) {
- pr_warn(PREFIX "Unsupported device scope\n");
+ pr_warn("Unsupported device scope\n");
}
start += scope->length;
}
@@ -258,23 +254,23 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
case ACPI_DMAR_TYPE_HARDWARE_UNIT:
drhd = container_of(header, struct acpi_dmar_hardware_unit,
header);
- pr_info(PREFIX "DRHD base: %#016Lx flags: %#x\n",
+ pr_info("DRHD base: %#016Lx flags: %#x\n",
(unsigned long long)drhd->address, drhd->flags);
break;
case ACPI_DMAR_TYPE_RESERVED_MEMORY:
rmrr = container_of(header, struct acpi_dmar_reserved_memory,
header);
- pr_info(PREFIX "RMRR base: %#016Lx end: %#016Lx\n",
+ pr_info("RMRR base: %#016Lx end: %#016Lx\n",
(unsigned long long)rmrr->base_address,
(unsigned long long)rmrr->end_address);
break;
case ACPI_DMAR_TYPE_ATSR:
atsr = container_of(header, struct acpi_dmar_atsr, header);
- pr_info(PREFIX "ATSR flags: %#x\n", atsr->flags);
+ pr_info("ATSR flags: %#x\n", atsr->flags);
break;
case ACPI_DMAR_HARDWARE_AFFINITY:
rhsa = container_of(header, struct acpi_dmar_rhsa, header);
- pr_info(PREFIX "RHSA base: %#016Lx proximity domain: %#x\n",
+ pr_info("RHSA base: %#016Lx proximity domain: %#x\n",
(unsigned long long)rhsa->base_address,
rhsa->proximity_domain);
break;
@@ -294,7 +290,7 @@ static int __init dmar_table_detect(void)
&dmar_tbl_size);
if (ACPI_SUCCESS(status) && !dmar_tbl) {
- pr_warn(PREFIX "Unable to map DMAR\n");
+ pr_warn("Unable to map DMAR\n");
status = AE_NOT_FOUND;
}
@@ -328,18 +324,18 @@ parse_dmar_table(void)
return -ENODEV;
if (dmar->width < PAGE_SHIFT - 1) {
- pr_warn(PREFIX "Invalid DMAR haw\n");
+ pr_warn("Invalid DMAR haw\n");
return -EINVAL;
}
- pr_info(PREFIX "Host address width %d\n", dmar->width + 1);
+ pr_info("Host address width %d\n", dmar->width + 1);
entry_header = (struct acpi_dmar_header *)(dmar + 1);
while (((unsigned long)entry_header) <
(((unsigned long)dmar) + dmar_tbl->length)) {
/* Avoid looping forever on bad ACPI tables */
if (entry_header->length == 0) {
- pr_warn(PREFIX "Invalid 0-length structure\n");
+ pr_warn("Invalid 0-length structure\n");
ret = -EINVAL;
break;
}
@@ -362,7 +358,7 @@ parse_dmar_table(void)
#endif
break;
default:
- pr_warn(PREFIX "Unknown DMAR structure type %d\n",
+ pr_warn("Unknown DMAR structure type %d\n",
entry_header->type);
ret = 0; /* for forward compatibility */
break;
@@ -461,12 +457,12 @@ int __init dmar_table_init(void)
ret = parse_dmar_table();
if (ret) {
if (ret != -ENODEV)
- pr_info(PREFIX "parse DMAR table failure.\n");
+ pr_info("parse DMAR table failure.\n");
return ret;
}
if (list_empty(&dmar_drhd_units)) {
- pr_info(PREFIX "No DMAR devices found\n");
+ pr_info("No DMAR devices found\n");
return -ENODEV;
}
@@ -498,7 +494,7 @@ int __init check_zero_address(void)
(((unsigned long)dmar) + dmar_tbl->length)) {
/* Avoid looping forever on bad ACPI tables */
if (entry_header->length == 0) {
- pr_warn(PREFIX "Invalid 0-length structure\n");
+ pr_warn("Invalid 0-length structure\n");
return 0;
}
@@ -549,8 +545,7 @@ int __init detect_intel_iommu(void)
if (ret && irq_remapping_enabled && cpu_has_x2apic &&
dmar->flags & 0x1)
- pr_info("Queued invalidation will be enabled to "
- "support x2apic and Intr-remapping.\n");
+ pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n");
if (ret && !no_iommu && !iommu_detected && !dmar_disabled) {
iommu_detected = 1;
@@ -1302,8 +1297,7 @@ int __init enable_drhd_fault_handling(void)
ret = dmar_set_interrupt(iommu);
if (ret) {
- pr_err("DRHD %Lx: failed to enable fault, "
- " interrupt, ret %d\n",
+ pr_err("DRHD %Lx: failed to enable fault, interrupt, ret %d\n",
(unsigned long long)drhd->reg_base_addr, ret);
return -1;
}
--
1.7.10.2.552.gaa3bb87
--
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