PCI: Remove unnecessary messages for memory allocation failures

Per ebfdc40969f2 ("checkpatch: attempt to find unnecessary 'out of memory'
messages"), when a memory allocation fails, the memory subsystem emits
generic "out of memory" messages (see slab_out_of_memory() for some of this
logging).  Therefore, additional error messages in the caller don't add
much value.

Remove messages that merely report "out of memory".

This preserves some messages that report additional information, e.g.,
allocation failures that mean we drop hotplug events.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[bhelgaas: changelog, squash patches, make similar changes to acpiphp,
cpqphp, ibmphp, keep warning when dropping hotplug event]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

9 files changed, 42 insertions, 91 deletions

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 5db6f1839dad..96f5b986454a 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -811,10 +811,8 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
 
 	handle = adev->handle;
 	bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
-	if (!bridge) {
-		acpi_handle_err(handle, "No memory for bridge object\n");
+	if (!bridge)
 		return;
-	}
 
 	INIT_LIST_HEAD(&bridge->slots);
 	kref_init(&bridge->ref);
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 70967ac75265..d28992788eaa 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -883,7 +883,6 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 	if (!ctrl) {
-		err("%s : out of memory\n", __func__);
 		rc = -ENOMEM;
 		goto err_disable_device;
 	}
diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
index 73cf84645c82..4f5c0b936797 100644
--- a/drivers/pci/hotplug/ibmphp_core.c
+++ b/drivers/pci/hotplug/ibmphp_core.c
@@ -603,10 +603,8 @@ int ibmphp_update_slot_info(struct slot *slot_cur)
 	u8 mode;
 
 	info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
-	if (!info) {
-		err("out of system memory\n");
+	if (!info)
 		return -ENOMEM;
-	}
 
 	info->power_status = SLOT_PWRGD(slot_cur->status);
 	info->attention_status = SLOT_ATTN(slot_cur->status,
@@ -734,14 +732,12 @@ static u8 bus_structure_fixup(u8 busno)
 		return 1;
 
 	bus = kmalloc(sizeof(*bus), GFP_KERNEL);
-	if (!bus) {
-		err("%s - out of memory\n", __func__);
+	if (!bus)
 		return 1;
-	}
+
 	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev) {
 		kfree(bus);
-		err("%s - out of memory\n", __func__);
 		return 1;
 	}
 
@@ -1101,7 +1097,6 @@ static int enable_slot(struct hotplug_slot *hs)
 	if (!slot_cur->func) {
 		/* We cannot do update_slot_info here, since no memory for
 		 * kmalloc n.e.ways, and update_slot_info allocates some */
-		err("out of system memory\n");
 		rc = -ENOMEM;
 		goto error_power;
 	}
@@ -1208,7 +1203,6 @@ int ibmphp_do_disable_slot(struct slot *slot_cur)
 		/* We need this for functions that were there on bootup */
 		slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
 		if (!slot_cur->func) {
-			err("out of system memory\n");
 			rc = -ENOMEM;
 			goto error;
 		}
@@ -1306,7 +1300,6 @@ static int __init ibmphp_init(void)
 
 	ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
 	if (!ibmphp_pci_bus) {
-		err("out of memory\n");
 		rc = -ENOMEM;
 		goto exit;
 	}
diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c
index 25edd0b18b75..c7ce7d8cf998 100644
--- a/drivers/pci/hotplug/ibmphp_pci.c
+++ b/drivers/pci/hotplug/ibmphp_pci.c
@@ -167,10 +167,9 @@ int ibmphp_configure_card(struct pci_func *func, u8 slotno)
 						goto error;
 					}
 					newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
-					if (!newfunc) {
-						err("out of system memory\n");
+					if (!newfunc)
 						return -ENOMEM;
-					}
+
 					newfunc->busno = cur_func->busno;
 					newfunc->device = device;
 					cur_func->next = newfunc;
@@ -205,10 +204,9 @@ int ibmphp_configure_card(struct pci_func *func, u8 slotno)
 					for (i = 0; i < 32; i++) {
 						if (func->devices[i]) {
 							newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
-							if (!newfunc) {
-								err("out of system memory\n");
+							if (!newfunc)
 								return -ENOMEM;
-							}
+
 							newfunc->busno = sec_number;
 							newfunc->device = (u8) i;
 							for (j = 0; j < 4; j++)
@@ -233,10 +231,9 @@ int ibmphp_configure_card(struct pci_func *func, u8 slotno)
 					}
 
 					newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
-					if (!newfunc) {
-						err("out of system memory\n");
+					if (!newfunc)
 						return -ENOMEM;
-					}
+
 					newfunc->busno = cur_func->busno;
 					newfunc->device = device;
 					for (j = 0; j < 4; j++)
@@ -279,10 +276,9 @@ int ibmphp_configure_card(struct pci_func *func, u8 slotno)
 						if (func->devices[i]) {
 							debug("inside for loop, device is %x\n", i);
 							newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
-							if (!newfunc) {
-								err(" out of system memory\n");
+							if (!newfunc)
 								return -ENOMEM;
-							}
+
 							newfunc->busno = sec_number;
 							newfunc->device = (u8) i;
 							for (j = 0; j < 4; j++)
@@ -405,10 +401,9 @@ static int configure_device(struct pci_func *func)
 
 			io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 
-			if (!io[count]) {
-				err("out of system memory\n");
+			if (!io[count])
 				return -ENOMEM;
-			}
+
 			io[count]->type = IO;
 			io[count]->busno = func->busno;
 			io[count]->devfunc = PCI_DEVFN(func->device, func->function);
@@ -442,10 +437,9 @@ static int configure_device(struct pci_func *func)
 				debug("len[count] in PFMEM %x, count %d\n", len[count], count);
 
 				pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
-				if (!pfmem[count]) {
-					err("out of system memory\n");
+				if (!pfmem[count])
 					return -ENOMEM;
-				}
+
 				pfmem[count]->type = PFMEM;
 				pfmem[count]->busno = func->busno;
 				pfmem[count]->devfunc = PCI_DEVFN(func->device,
@@ -458,7 +452,6 @@ static int configure_device(struct pci_func *func)
 				} else {
 					mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 					if (!mem_tmp) {
-						err("out of system memory\n");
 						kfree(pfmem[count]);
 						return -ENOMEM;
 					}
@@ -508,10 +501,9 @@ static int configure_device(struct pci_func *func)
 				debug("len[count] in Mem %x, count %d\n", len[count], count);
 
 				mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
-				if (!mem[count]) {
-					err("out of system memory\n");
+				if (!mem[count])
 					return -ENOMEM;
-				}
+
 				mem[count]->type = MEM;
 				mem[count]->busno = func->busno;
 				mem[count]->devfunc = PCI_DEVFN(func->device,
@@ -674,7 +666,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 			bus_io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 
 			if (!bus_io[count]) {
-				err("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
@@ -706,7 +697,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 
 				bus_pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!bus_pfmem[count]) {
-					err("out of system memory\n");
 					retval = -ENOMEM;
 					goto error;
 				}
@@ -722,7 +712,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 				} else {
 					mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 					if (!mem_tmp) {
-						err("out of system memory\n");
 						retval = -ENOMEM;
 						goto error;
 					}
@@ -763,7 +752,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 
 				bus_mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!bus_mem[count]) {
-					err("out of system memory\n");
 					retval = -ENOMEM;
 					goto error;
 				}
@@ -834,7 +822,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 		io = kzalloc(sizeof(*io), GFP_KERNEL);
 
 		if (!io) {
-			err("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
@@ -856,7 +843,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 		debug("it wants %x memory behind the bridge\n", amount_needed->mem);
 		mem = kzalloc(sizeof(*mem), GFP_KERNEL);
 		if (!mem) {
-			err("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
@@ -878,7 +864,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 		debug("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem);
 		pfmem = kzalloc(sizeof(*pfmem), GFP_KERNEL);
 		if (!pfmem) {
-			err("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
@@ -893,7 +878,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 		} else {
 			mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 			if (!mem_tmp) {
-				err("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
@@ -924,7 +908,6 @@ static int configure_bridge(struct pci_func **func_passed, u8 slotno)
 		if (!bus) {
 			bus = kzalloc(sizeof(*bus), GFP_KERNEL);
 			if (!bus) {
-				err("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
@@ -1652,10 +1635,9 @@ static int add_new_bus(struct bus_node *bus, struct resource_node *io, struct re
 	}
 	if (io) {
 		io_range = kzalloc(sizeof(*io_range), GFP_KERNEL);
-		if (!io_range) {
-			err("out of system memory\n");
+		if (!io_range)
 			return -ENOMEM;
-		}
+
 		io_range->start = io->start;
 		io_range->end = io->end;
 		io_range->rangeno = 1;
@@ -1664,10 +1646,9 @@ static int add_new_bus(struct bus_node *bus, struct resource_node *io, struct re
 	}
 	if (mem) {
 		mem_range = kzalloc(sizeof(*mem_range), GFP_KERNEL);
-		if (!mem_range) {
-			err("out of system memory\n");
+		if (!mem_range)
 			return -ENOMEM;
-		}
+
 		mem_range->start = mem->start;
 		mem_range->end = mem->end;
 		mem_range->rangeno = 1;
@@ -1676,10 +1657,9 @@ static int add_new_bus(struct bus_node *bus, struct resource_node *io, struct re
 	}
 	if (pfmem) {
 		pfmem_range = kzalloc(sizeof(*pfmem_range), GFP_KERNEL);
-		if (!pfmem_range) {
-			err("out of system memory\n");
+		if (!pfmem_range)
 			return -ENOMEM;
-		}
+
 		pfmem_range->start = pfmem->start;
 		pfmem_range->end = pfmem->end;
 		pfmem_range->rangeno = 1;
diff --git a/drivers/pci/hotplug/ibmphp_res.c b/drivers/pci/hotplug/ibmphp_res.c
index aee6e41001e1..b58a7a641e0e 100644
--- a/drivers/pci/hotplug/ibmphp_res.c
+++ b/drivers/pci/hotplug/ibmphp_res.c
@@ -56,10 +56,8 @@ static struct bus_node * __init alloc_error_bus(struct ebda_pci_rsrc *curr, u8 b
 	}
 
 	newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
-	if (!newbus) {
-		err("out of system memory\n");
+	if (!newbus)
 		return NULL;
-	}
 
 	if (flag)
 		newbus->busno = busno;
@@ -79,10 +77,9 @@ static struct resource_node * __init alloc_resources(struct ebda_pci_rsrc *curr)
 	}
 
 	rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
-	if (!rs) {
-		err("out of system memory\n");
+	if (!rs)
 		return NULL;
-	}
+
 	rs->busno = curr->bus_num;
 	rs->devfunc = curr->dev_fun;
 	rs->start = curr->start_addr;
@@ -99,10 +96,9 @@ static int __init alloc_bus_range(struct bus_node **new_bus, struct range_node *
 
 	if (first_bus) {
 		newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
-		if (!newbus) {
-			err("out of system memory.\n");
+		if (!newbus)
 			return -ENOMEM;
-		}
+
 		newbus->busno = curr->bus_num;
 	} else {
 		newbus = *new_bus;
@@ -123,7 +119,6 @@ static int __init alloc_bus_range(struct bus_node **new_bus, struct range_node *
 	if (!newrange) {
 		if (first_bus)
 			kfree(newbus);
-		err("out of system memory\n");
 		return -ENOMEM;
 	}
 	newrange->start = curr->start_addr;
@@ -1707,10 +1702,9 @@ static int __init once_over(void)
 				bus_cur->firstPFMemFromMem = pfmem_cur;
 
 				mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
-				if (!mem) {
-					err("out of system memory\n");
+				if (!mem)
 					return -ENOMEM;
-				}
+
 				mem->type = MEM;
 				mem->busno = pfmem_cur->busno;
 				mem->devfunc = pfmem_cur->devfunc;
@@ -1989,10 +1983,9 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 
 						if ((start_address) && (start_address <= end_address)) {
 							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
-							if (!range) {
-								err("out of system memory\n");
+							if (!range)
 								return -ENOMEM;
-							}
+
 							range->start = start_address;
 							range->end = end_address + 0xfff;
 
@@ -2016,7 +2009,6 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 								io = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!io) {
 									kfree(range);
-									err("out of system memory\n");
 									return -ENOMEM;
 								}
 								io->type = IO;
@@ -2038,10 +2030,9 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 						if ((start_address) && (start_address <= end_address)) {
 
 							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
-							if (!range) {
-								err("out of system memory\n");
+							if (!range)
 								return -ENOMEM;
-							}
+
 							range->start = start_address;
 							range->end = end_address + 0xfffff;
 
@@ -2066,7 +2057,6 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 								mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!mem) {
 									kfree(range);
-									err("out of system memory\n");
 									return -ENOMEM;
 								}
 								mem->type = MEM;
@@ -2092,10 +2082,9 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 						if ((start_address) && (start_address <= end_address)) {
 
 							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
-							if (!range) {
-								err("out of system memory\n");
+							if (!range)
 								return -ENOMEM;
-							}
+
 							range->start = start_address;
 							range->end = end_address + 0xfffff;
 
@@ -2119,7 +2108,6 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 								pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!pfmem) {
 									kfree(range);
-									err("out of system memory\n");
 									return -ENOMEM;
 								}
 								pfmem->type = PFMEM;
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 7bab0606f1a9..ed27635ec740 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -838,10 +838,9 @@ struct controller *pcie_init(struct pcie_device *dev)
 	struct pci_dev *pdev = dev->port;
 
 	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
-	if (!ctrl) {
-		dev_err(&dev->device, "%s: Out of memory\n", __func__);
+	if (!ctrl)
 		goto abort;
-	}
+
 	ctrl->pcie = dev;
 	pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &slot_cap);
 
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 74f6a17e4614..318baa507364 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -266,7 +266,6 @@ static int pnv_php_add_devtree(struct pnv_php_slot *php_slot)
 	fdt1 = kzalloc(0x10000, GFP_KERNEL);
 	if (!fdt1) {
 		ret = -ENOMEM;
-		dev_warn(&php_slot->pdev->dev, "Cannot alloc FDT blob\n");
 		goto out;
 	}
 
@@ -280,8 +279,6 @@ static int pnv_php_add_devtree(struct pnv_php_slot *php_slot)
 	fdt = kzalloc(fdt_totalsize(fdt1), GFP_KERNEL);
 	if (!fdt) {
 		ret = -ENOMEM;
-		dev_warn(&php_slot->pdev->dev, "Cannot %d bytes memory\n",
-			 fdt_totalsize(fdt1));
 		goto free_fdt1;
 	}
 
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index 7bfb87bd2b7e..2f2b87acf179 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -305,10 +305,9 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return -ENODEV;
 
 	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
-	if (!ctrl) {
-		dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
+	if (!ctrl)
 		goto err_out_none;
-	}
+
 	INIT_LIST_HEAD(&ctrl->slot_list);
 
 	rc = shpc_init(ctrl, pdev);
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index b1ad466199ad..d131d29c4fdb 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -67,10 +67,8 @@ static int add_to_list(struct list_head *head,
 	struct pci_dev_resource *tmp;
 
 	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
-	if (!tmp) {
-		pr_warn("add_to_list: kmalloc() failed!\n");
+	if (!tmp)
 		return -ENOMEM;
-	}
 
 	tmp->res = res;
 	tmp->dev = dev;