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Date: Wed, 20 Jun 2018 08:18:34 -0700
From: Joe Perches <joe@...ches.com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
linux-pci <linux-pci@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Frederick Lawler <fred@...dlawl.com>
Subject: Re: pci: pci_printk use
On Wed, 2018-06-20 at 08:28 -0500, Bjorn Helgaas wrote:
> On Tue, Jun 19, 2018 at 09:33:18PM -0700, Joe Perches wrote:
> > All the pci_printk uses are at KERN_DEBUG which is always
> > emitted into the kernel logging whenever the console log
> > level is high enough.
> >
> > Are any of these appropriate for conversion to pci_dbg
> > to allow these only to be emitted via dynamic_debug or
> > if necessary via a #define DEBUG during compilation?
>
> I think pci_printk(KERN_DEBUG) is a little ugly to read.
As do I which is why I bring it up.
> My
> preference would be to remove them (and pci_dbg() uses) completely or
> convert them to pci_info(). Most of these are boot-time or low
> frequency messages, so I doubt the loglevel differentiation of
> DEBUG/INFO is really necessary.
Perhaps so.
Does anyone have objections to a patch that removes
the #define pci_printk and does:
$ git ls-files -- 'drivers/pci/*.[ch]' \
xargs sed -i 's/pci_printk(KERN_DEBUG, /pci_info(/'
with some alignment neatening?
Only issue I see is ctrl_dbg in the hotplug code
being emitted at KERN_INFO but it is only output
when a guard flag is set. Maybe those should use
the normal pci_dbg instead of the shpchp_debug
guard.
---
drivers/pci/bus.c | 3 +--
drivers/pci/hotplug/shpchp.h | 3 +--
drivers/pci/pci.c | 28 ++++++++++++++--------------
drivers/pci/pcie/aer.c | 5 ++---
drivers/pci/pcie/err.c | 18 +++++++++---------
drivers/pci/probe.c | 18 +++++++++---------
drivers/pci/setup-bus.c | 26 +++++++++++++-------------
include/linux/pci.h | 3 ---
8 files changed, 49 insertions(+), 55 deletions(-)
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 35b7fc87eac5..82322c5bcc80 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -288,8 +288,7 @@ bool pci_bus_clip_resource(struct pci_dev *dev, int idx)
res->end = end;
res->flags &= ~IORESOURCE_UNSET;
orig_res.flags &= ~IORESOURCE_UNSET;
- pci_printk(KERN_DEBUG, dev, "%pR clipped to %pR\n",
- &orig_res, res);
+ pci_info(dev, "%pR clipped to %pR\n", &orig_res, res);
return true;
}
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index 516e4835019c..64a74c364529 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -48,8 +48,7 @@ do { \
#define ctrl_dbg(ctrl, format, arg...) \
do { \
if (shpchp_debug) \
- pci_printk(KERN_DEBUG, ctrl->pci_dev, \
- format, ## arg); \
+ pci_info(ctrl->pci_dev, format, ## arg); \
} while (0)
#define ctrl_err(ctrl, format, arg...) \
pci_err(ctrl->pci_dev, format, ## arg)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 97acba712e4e..6a5390fa312f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2481,14 +2481,14 @@ void pci_pm_init(struct pci_dev *dev)
dev->d2_support = true;
if (dev->d1_support || dev->d2_support)
- pci_printk(KERN_DEBUG, dev, "supports%s%s\n",
- dev->d1_support ? " D1" : "",
- dev->d2_support ? " D2" : "");
+ pci_info(dev, "supports%s%s\n",
+ dev->d1_support ? " D1" : "",
+ dev->d2_support ? " D2" : "");
}
pmc &= PCI_PM_CAP_PME_MASK;
if (pmc) {
- pci_printk(KERN_DEBUG, dev, "PME# supported from%s%s%s%s%s\n",
+ pci_info(dev, "PME# supported from%s%s%s%s%s\n",
(pmc & PCI_PM_CAP_PME_D0) ? " D0" : "",
(pmc & PCI_PM_CAP_PME_D1) ? " D1" : "",
(pmc & PCI_PM_CAP_PME_D2) ? " D2" : "",
@@ -2652,17 +2652,17 @@ static int pci_ea_read(struct pci_dev *dev, int offset)
res->flags = flags;
if (bei <= PCI_EA_BEI_BAR5)
- pci_printk(KERN_DEBUG, dev, "BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",
- bei, res, prop);
+ pci_info(dev, "BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",
+ bei, res, prop);
else if (bei == PCI_EA_BEI_ROM)
- pci_printk(KERN_DEBUG, dev, "ROM: %pR (from Enhanced Allocation, properties %#02x)\n",
- res, prop);
+ pci_info(dev, "ROM: %pR (from Enhanced Allocation, properties %#02x)\n",
+ res, prop);
else if (bei >= PCI_EA_BEI_VF_BAR0 && bei <= PCI_EA_BEI_VF_BAR5)
- pci_printk(KERN_DEBUG, dev, "VF BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",
- bei - PCI_EA_BEI_VF_BAR0, res, prop);
+ pci_info(dev, "VF BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",
+ bei - PCI_EA_BEI_VF_BAR0, res, prop);
else
- pci_printk(KERN_DEBUG, dev, "BEI %d res: %pR (from Enhanced Allocation, properties %#02x)\n",
- bei, res, prop);
+ pci_info(dev, "BEI %d res: %pR (from Enhanced Allocation, properties %#02x)\n",
+ bei, res, prop);
out:
return offset + ent_size;
@@ -3772,8 +3772,8 @@ int pci_set_cacheline_size(struct pci_dev *dev)
if (cacheline_size == pci_cache_line_size)
return 0;
- pci_printk(KERN_DEBUG, dev, "cache line size of %d is not supported\n",
- pci_cache_line_size << 2);
+ pci_info(dev, "cache line size of %d is not supported\n",
+ pci_cache_line_size << 2);
return -EINVAL;
}
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a2e88386af28..ed0c313bf09c 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -772,8 +772,7 @@ static bool find_source_device(struct pci_dev *parent,
pci_walk_bus(parent->subordinate, find_device_iter, e_info);
if (!e_info->error_dev_num) {
- pci_printk(KERN_DEBUG, parent, "can't find device of ID%04x\n",
- e_info->id);
+ pci_info(parent, "can't find device of ID%04x\n", e_info->id);
return false;
}
return true;
@@ -1314,7 +1313,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);
pci_reset_bridge_secondary_bus(dev);
- pci_printk(KERN_DEBUG, dev, "Root Port link has been reset\n");
+ pci_info(dev, "Root Port link has been reset\n");
/* Clear Root Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, ®32);
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index f7ce0cb0b0b7..b0df9bf66b2e 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -72,9 +72,9 @@ static int report_error_detected(struct pci_dev *dev, void *data)
* of a driver for this device is unaware of
* its hw state.
*/
- pci_printk(KERN_DEBUG, dev, "device has %s\n",
- dev->driver ?
- "no AER-aware driver" : "no driver");
+ pci_info(dev, "device has %s\n",
+ dev->driver ?
+ "no AER-aware driver" : "no driver");
}
/*
@@ -176,7 +176,7 @@ static int report_resume(struct pci_dev *dev, void *data)
static pci_ers_result_t default_reset_link(struct pci_dev *dev)
{
pci_reset_bridge_secondary_bus(dev);
- pci_printk(KERN_DEBUG, dev, "downstream link has been reset\n");
+ pci_info(dev, "downstream link has been reset\n");
return PCI_ERS_RESULT_RECOVERED;
}
@@ -202,14 +202,14 @@ static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service)
} else if (udev->has_secondary_link) {
status = default_reset_link(udev);
} else {
- pci_printk(KERN_DEBUG, dev, "no link-reset support at upstream device %s\n",
- pci_name(udev));
+ pci_info(dev, "no link-reset support at upstream device %s\n",
+ pci_name(udev));
return PCI_ERS_RESULT_DISCONNECT;
}
if (status != PCI_ERS_RESULT_RECOVERED) {
- pci_printk(KERN_DEBUG, dev, "link reset at upstream device %s failed\n",
- pci_name(udev));
+ pci_info(dev, "link reset at upstream device %s failed\n",
+ pci_name(udev));
return PCI_ERS_RESULT_DISCONNECT;
}
@@ -234,7 +234,7 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
{
struct aer_broadcast_data result_data;
- pci_printk(KERN_DEBUG, dev, "broadcast %s message\n", error_mesg);
+ pci_info(dev, "broadcast %s message\n", error_mesg);
result_data.state = state;
if (cb == report_error_detected)
result_data.result = PCI_ERS_RESULT_CAN_RECOVER;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ac876e32de4b..828cb8f89066 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -318,7 +318,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
res->flags = 0;
out:
if (res->flags)
- pci_printk(KERN_DEBUG, dev, "reg 0x%x: %pR\n", pos, res);
+ pci_info(dev, "reg 0x%x: %pR\n", pos, res);
return (res->flags & IORESOURCE_MEM_64) ? 1 : 0;
}
@@ -385,7 +385,7 @@ static void pci_read_bridge_io(struct pci_bus *child)
region.start = base;
region.end = limit + io_granularity - 1;
pcibios_bus_to_resource(dev->bus, res, ®ion);
- pci_printk(KERN_DEBUG, dev, " bridge window %pR\n", res);
+ pci_info(dev, " bridge window %pR\n", res);
}
}
@@ -407,7 +407,7 @@ static void pci_read_bridge_mmio(struct pci_bus *child)
region.start = base;
region.end = limit + 0xfffff;
pcibios_bus_to_resource(dev->bus, res, ®ion);
- pci_printk(KERN_DEBUG, dev, " bridge window %pR\n", res);
+ pci_info(dev, " bridge window %pR\n", res);
}
}
@@ -460,7 +460,7 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
region.start = base;
region.end = limit + 0xfffff;
pcibios_bus_to_resource(dev->bus, res, ®ion);
- pci_printk(KERN_DEBUG, dev, " bridge window %pR\n", res);
+ pci_info(dev, " bridge window %pR\n", res);
}
}
@@ -490,9 +490,9 @@ void pci_read_bridge_bases(struct pci_bus *child)
if (res && res->flags) {
pci_bus_add_resource(child, res,
PCI_SUBTRACTIVE_DECODE);
- pci_printk(KERN_DEBUG, dev,
- " bridge window %pR (subtractive decode)\n",
- res);
+ pci_info(dev,
+ " bridge window %pR (subtractive decode)\n",
+ res);
}
}
}
@@ -1595,8 +1595,8 @@ int pci_setup_device(struct pci_dev *dev)
dev->revision = class & 0xff;
dev->class = class >> 8; /* upper 3 bytes */
- pci_printk(KERN_DEBUG, dev, "[%04x:%04x] type %02x class %#08x\n",
- dev->vendor, dev->device, dev->hdr_type, dev->class);
+ pci_info(dev, "[%04x:%04x] type %02x class %#08x\n",
+ dev->vendor, dev->device, dev->hdr_type, dev->class);
/* Need to have dev->class ready */
dev->cfg_size = pci_cfg_space_size(dev);
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 79b1824e83b4..308f8d10e4a7 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -255,10 +255,10 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
(IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN);
if (pci_reassign_resource(add_res->dev, idx,
add_size, align))
- pci_printk(KERN_DEBUG, add_res->dev,
- "failed to add %llx res[%d]=%pR\n",
- (unsigned long long)add_size,
- idx, res);
+ pci_info(add_res->dev,
+ "failed to add %llx res[%d]=%pR\n",
+ (unsigned long long)add_size,
+ idx, res);
}
out:
list_del(&add_res->list);
@@ -951,9 +951,9 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
if (size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0,
min_align);
- pci_printk(KERN_DEBUG, bus->self, "bridge window %pR to %pR add_size %llx\n",
- b_res, &bus->busn_res,
- (unsigned long long)size1-size0);
+ pci_info(bus->self, "bridge window %pR to %pR add_size %llx\n",
+ b_res, &bus->busn_res,
+ (unsigned long long)size1 - size0);
}
}
@@ -1098,10 +1098,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
b_res->flags |= IORESOURCE_STARTALIGN;
if (size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0, add_align);
- pci_printk(KERN_DEBUG, bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n",
- b_res, &bus->busn_res,
- (unsigned long long) (size1 - size0),
- (unsigned long long) add_align);
+ pci_info(bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n",
+ b_res, &bus->busn_res,
+ (unsigned long long)size1 - size0,
+ (unsigned long long)add_align);
}
return 0;
}
@@ -1566,8 +1566,8 @@ static void pci_bridge_release_resources(struct pci_bus *bus,
release_child_resources(r);
if (!release_resource(r)) {
type = old_flags = r->flags & PCI_RES_TYPE_MASK;
- pci_printk(KERN_DEBUG, dev, "resource %d %pR released\n",
- PCI_BRIDGE_RESOURCES + idx, r);
+ pci_info(dev, "resource %d %pR released\n",
+ PCI_BRIDGE_RESOURCES + idx, r);
/* keep the old size */
r->end = resource_size(r) - 1;
r->start = 0;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 340029b2fb38..e93a55336ecc 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2298,9 +2298,6 @@ void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
/* Provide the legacy pci_dma_* API */
#include <linux/pci-dma-compat.h>
-#define pci_printk(level, pdev, fmt, arg...) \
- dev_printk(level, &(pdev)->dev, fmt, ##arg)
-
#define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
#define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
#define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
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