From d410a6417e5e4deb4a9c34164addcebebc9099c9 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Tue, 3 Oct 2017 13:18:47 +0200 Subject: [PATCH 1/3] ide: free hwif->portdev on hwif_init() failure Recent pci_assign_irq() changes uncovered a problem with missing freeing of ide_port class instance on hwif_init() failure in ide_host_register(): ide0: disabled, no IRQ ide0: failed to initialize IDE interface ide0: disabling port cmd64x 0000:00:02.0: IDE controller (0x1095:0x0646 rev 0x07) CMD64x_IDE 0000:00:02.0: BAR 0: can't reserve [io 0x8050-0x8057] cmd64x 0000:00:02.0: can't reserve resources CMD64x_IDE: probe of 0000:00:02.0 failed with error -16 ide_generic: please use "probe_mask=0x3f" module parameter for probing all legacy ISA IDE ports ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x94/0xd0 sysfs: cannot create duplicate filename '/class/ide_port/ide0' ... Trace: [] __warn+0x160/0x190 [] sysfs_warn_dup+0x94/0xd0 [] warn_slowpath_fmt+0x58/0x70 [] sysfs_warn_dup+0x94/0xd0 [] kernfs_path_from_node+0x30/0x60 [] kernfs_put+0x16c/0x2c0 [] kernfs_put+0x16c/0x2c0 [] sysfs_do_create_link_sd.isra.2+0x100/0x120 [] device_add+0x2a4/0x7c0 [] device_create_groups_vargs+0x14c/0x170 [] device_create_groups_vargs+0x98/0x170 [] device_create+0x50/0x70 [] ide_host_register+0x48c/0xa00 [] ide_host_register+0x450/0xa00 [] device_register+0x20/0x50 [] ide_host_register+0x450/0xa00 [] ide_host_add+0x64/0xe0 [] kobject_uevent_env+0x16c/0x710 [] do_one_initcall+0x68/0x260 [] kernel_init+0x1c/0x1a0 [] kernel_init+0x0/0x1a0 [] ret_from_kernel_thread+0x18/0x20 [] kernel_init+0x0/0x1a0 ---[ end trace 24a70433c3e4d374 ]--- ide0: disabling port Fix the problem by adding missing code to ide_host_register(). Fixes: 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()") Fixes: 0e4c2eeb758a ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") Link: http://lkml.kernel.org/r/32ec730f-c1b0-5584-cd35-f8a809122b96@roeck-us.net Reported-by: Guenter Roeck Tested-by: Guenter Roeck Signed-off-by: Bartlomiej Zolnierkiewicz [bhelgaas: add Fixes:] Signed-off-by: Bjorn Helgaas Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner --- drivers/ide/ide-probe.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 01b2adfd8226..eaf39e5db08b 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -1451,6 +1451,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d, if (hwif_init(hwif) == 0) { printk(KERN_INFO "%s: failed to initialize IDE " "interface\n", hwif->name); + device_unregister(hwif->portdev); device_unregister(&hwif->gendev); ide_disable_port(hwif); continue; From a06876a766c27dcedf17a0f60be89609ee23d861 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Tue, 3 Oct 2017 14:17:13 +0200 Subject: [PATCH 2/3] ide: pci: free PCI BARs on initialization failure Recent pci_assign_irq() changes uncovered a problem with missing freeing of PCI BARs on PCI IDE host initialization failure: ide0: disabled, no IRQ ide0: failed to initialize IDE interface ide0: disabling port cmd64x 0000:00:02.0: IDE controller (0x1095:0x0646 rev 0x07) CMD64x_IDE 0000:00:02.0: BAR 0: can't reserve [io 0x8050-0x8057] cmd64x 0000:00:02.0: can't reserve resources CMD64x_IDE: probe of 0000:00:02.0 failed with error -16 Fix the problem by adding missing freeing of PCI BARs to ide_setup_pci_controller() and ide_pci_init_two(). Fixes: 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()") Fixes: 0e4c2eeb758a ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") Link: http://lkml.kernel.org/r/32ec730f-c1b0-5584-cd35-f8a809122b96@roeck-us.net Reported-by: Guenter Roeck Tested-by: Guenter Roeck Signed-off-by: Bartlomiej Zolnierkiewicz [bhelgaas: add Fixes:] Signed-off-by: Bjorn Helgaas Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner --- drivers/ide/setup-pci.c | 63 ++++++++++++++++++++++++++--------------- 1 file changed, 40 insertions(+), 23 deletions(-) diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c index 112d2fe1bcdb..fdc8e813170c 100644 --- a/drivers/ide/setup-pci.c +++ b/drivers/ide/setup-pci.c @@ -179,6 +179,7 @@ EXPORT_SYMBOL_GPL(ide_setup_pci_noise); /** * ide_pci_enable - do PCI enables * @dev: PCI device + * @bars: PCI BARs mask * @d: IDE port info * * Enable the IDE PCI device. We attempt to enable the device in full @@ -189,9 +190,10 @@ EXPORT_SYMBOL_GPL(ide_setup_pci_noise); * Returns zero on success or an error code */ -static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d) +static int ide_pci_enable(struct pci_dev *dev, int bars, + const struct ide_port_info *d) { - int ret, bars; + int ret; if (pci_enable_device(dev)) { ret = pci_enable_device_io(dev); @@ -216,18 +218,6 @@ static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d) goto out; } - if (d->host_flags & IDE_HFLAG_SINGLE) - bars = (1 << 2) - 1; - else - bars = (1 << 4) - 1; - - if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { - if (d->host_flags & IDE_HFLAG_CS5520) - bars |= (1 << 2); - else - bars |= (1 << 4); - } - ret = pci_request_selected_regions(dev, bars, d->name); if (ret < 0) printk(KERN_ERR "%s %s: can't reserve resources\n", @@ -403,6 +393,7 @@ int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d) /** * ide_setup_pci_controller - set up IDE PCI * @dev: PCI device + * @bars: PCI BARs mask * @d: IDE port info * @noisy: verbose flag * @@ -411,7 +402,7 @@ int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d) * and enables it if need be */ -static int ide_setup_pci_controller(struct pci_dev *dev, +static int ide_setup_pci_controller(struct pci_dev *dev, int bars, const struct ide_port_info *d, int noisy) { int ret; @@ -420,7 +411,7 @@ static int ide_setup_pci_controller(struct pci_dev *dev, if (noisy) ide_setup_pci_noise(dev, d); - ret = ide_pci_enable(dev, d); + ret = ide_pci_enable(dev, bars, d); if (ret < 0) goto out; @@ -428,16 +419,20 @@ static int ide_setup_pci_controller(struct pci_dev *dev, if (ret < 0) { printk(KERN_ERR "%s %s: error accessing PCI regs\n", d->name, pci_name(dev)); - goto out; + goto out_free_bars; } if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */ ret = ide_pci_configure(dev, d); if (ret < 0) - goto out; + goto out_free_bars; printk(KERN_INFO "%s %s: device enabled (Linux)\n", d->name, pci_name(dev)); } + goto out; + +out_free_bars: + pci_release_selected_regions(dev, bars); out: return ret; } @@ -540,13 +535,28 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, { struct pci_dev *pdev[] = { dev1, dev2 }; struct ide_host *host; - int ret, i, n_ports = dev2 ? 4 : 2; + int ret, i, n_ports = dev2 ? 4 : 2, bars; struct ide_hw hw[4], *hws[] = { NULL, NULL, NULL, NULL }; + if (d->host_flags & IDE_HFLAG_SINGLE) + bars = (1 << 2) - 1; + else + bars = (1 << 4) - 1; + + if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { + if (d->host_flags & IDE_HFLAG_CS5520) + bars |= (1 << 2); + else + bars |= (1 << 4); + } + for (i = 0; i < n_ports / 2; i++) { - ret = ide_setup_pci_controller(pdev[i], d, !i); - if (ret < 0) + ret = ide_setup_pci_controller(pdev[i], bars, d, !i); + if (ret < 0) { + if (i == 1) + pci_release_selected_regions(pdev[0], bars); goto out; + } ide_pci_setup_ports(pdev[i], d, &hw[i*2], &hws[i*2]); } @@ -554,7 +564,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, host = ide_host_alloc(d, hws, n_ports); if (host == NULL) { ret = -ENOMEM; - goto out; + goto out_free_bars; } host->dev[0] = &dev1->dev; @@ -576,7 +586,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, * do_ide_setup_pci_device() on the first device! */ if (ret < 0) - goto out; + goto out_free_bars; /* fixup IRQ */ if (ide_pci_is_in_compatibility_mode(pdev[i])) { @@ -589,6 +599,13 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, ret = ide_host_register(host, d, hws); if (ret) ide_host_free(host); + else + goto out; + +out_free_bars: + i = n_ports / 2; + while (i--) + pci_release_selected_regions(pdev[i], bars); out: return ret; } From b1f9e5e355e909000fcccfd2bc31f7c1ded358ab Mon Sep 17 00:00:00 2001 From: Lorenzo Pieralisi Date: Mon, 2 Oct 2017 11:52:47 +0100 Subject: [PATCH 3/3] ide: fix IRQ assignment for PCI bus order probing We used to assign IRQs for all devices at boot-time, before any drivers claimed devices. The following commits: 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()") 0e4c2eeb758a ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") changed this so we now call pci_assign_irq() from pci_device_probe() when we call a driver's probe method. The ide_scan_pcibus() path (enabled by CONFIG_IDEPCI_PCIBUS_ORDER) bypasses pci_device_probe() so it can guarantee devices are claimed in order of PCI bus address. It calls the driver's probe method directly, so it misses the pci_assign_irq() call (and other PCI initialization functions), which causes failures like this: ide0: disabled, no IRQ ide0: failed to initialize IDE interface ide0: disabling port cmd64x 0000:00:02.0: IDE controller (0x1095:0x0646 rev 0x07) CMD64x_IDE 0000:00:02.0: BAR 0: can't reserve [io 0x8050-0x8057] cmd64x 0000:00:02.0: can't reserve resources CMD64x_IDE: probe of 0000:00:02.0 failed with error -16 ide_generic: please use "probe_mask=0x3f" module parameter for probing all legacy ISA IDE ports ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x94/0xd0 sysfs: cannot create duplicate filename '/class/ide_port/ide0' ... Trace: [] sysfs_warn_dup+0x94/0xd0 [] warn_slowpath_fmt+0x58/0x70 [] sysfs_warn_dup+0x94/0xd0 [] kernfs_path_from_node+0x30/0x60 [] kernfs_put+0x16c/0x2c0 [] kernfs_put+0x16c/0x2c0 [] sysfs_do_create_link_sd.isra.2+0x100/0x120 [] device_add+0x2a4/0x7c0 [] device_create_groups_vargs+0x14c/0x170 [] device_create_groups_vargs+0x98/0x170 [] device_create+0x50/0x70 [] ide_host_register+0x48c/0xa00 [] ide_host_register+0x450/0xa00 [] device_register+0x20/0x50 [] ide_host_register+0x450/0xa00 [] ide_host_add+0x64/0xe0 [] kobject_uevent_env+0x16c/0x710 [] do_one_initcall+0x68/0x260 [] kernel_init+0x1c/0x1a0 ... ---[ end trace 24a70433c3e4d374 ]--- ide0: disabling port Fix the IRQ allocation issue by calling pci_assign_irq() from ide_scan_pcidev() before probing the IDE PCI drivers, so that IRQs for a given PCI device are allocated for the IDE PCI drivers to use them for device configuration. Fixes: 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()") Fixes: 0e4c2eeb758a ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") Link: http://lkml.kernel.org/r/32ec730f-c1b0-5584-cd35-f8a809122b96@roeck-us.net Reported-by: Guenter Roeck Tested-by: Guenter Roeck Signed-off-by: Lorenzo Pieralisi [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas Reviewed-by: Bartlomiej Zolnierkiewicz Acked-by: David S. Miller Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner --- drivers/ide/ide-scan-pci.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/ide/ide-scan-pci.c b/drivers/ide/ide-scan-pci.c index 86aa88aeb3a6..acf874800ca4 100644 --- a/drivers/ide/ide-scan-pci.c +++ b/drivers/ide/ide-scan-pci.c @@ -56,6 +56,7 @@ static int __init ide_scan_pcidev(struct pci_dev *dev) { struct list_head *l; struct pci_driver *d; + int ret; list_for_each(l, &ide_pci_drivers) { d = list_entry(l, struct pci_driver, node); @@ -63,10 +64,14 @@ static int __init ide_scan_pcidev(struct pci_dev *dev) const struct pci_device_id *id = pci_match_id(d->id_table, dev); - if (id != NULL && d->probe(dev, id) >= 0) { - dev->driver = d; - pci_dev_get(dev); - return 1; + if (id != NULL) { + pci_assign_irq(dev); + ret = d->probe(dev, id); + if (ret >= 0) { + dev->driver = d; + pci_dev_get(dev); + return 1; + } } } }