diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-02-12 08:21:34 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-21 15:22:49 -0300 |
commit | 0142877aa4e54dd9943fb727e9b386c36c8e3ab7 (patch) | |
tree | a417008857f8bb421052bf22b2ce03be49053f5e /drivers/edac | |
parent | df95e42e1f20a561f2fe0a632d5b8fd6c26f1bb9 (diff) | |
download | linux-0142877aa4e54dd9943fb727e9b386c36c8e3ab7.tar.bz2 |
i5400_edac: Avoid calling pci_put_device() twice
When i5400_edac driver is removed and re-loaded a few times, it causes
an OOPS, as it is currently decrementing some PCI device usage two
times.
When called inside a loop, pci_get_device() will call
pci_put_device(). That mangles the error count. In this specific
case, it seems easier to just duplicate the call.
Also fixes the error logic when pci_get_device fails.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/edac')
-rw-r--r-- | drivers/edac/i5400_edac.c | 54 |
1 files changed, 38 insertions, 16 deletions
diff --git a/drivers/edac/i5400_edac.c b/drivers/edac/i5400_edac.c index 74d6ec342afb..b44a5de1c22c 100644 --- a/drivers/edac/i5400_edac.c +++ b/drivers/edac/i5400_edac.c @@ -735,7 +735,7 @@ static int i5400_get_devices(struct mem_ctl_info *mci, int dev_idx) /* Attempt to 'get' the MCH register we want */ pdev = NULL; - while (!pvt->branchmap_werrors || !pvt->fsb_error_regs) { + while (1) { pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR, pdev); if (!pdev) { @@ -743,23 +743,42 @@ static int i5400_get_devices(struct mem_ctl_info *mci, int dev_idx) i5400_printk(KERN_ERR, "'system address,Process Bus' " "device not found:" - "vendor 0x%x device 0x%x ERR funcs " + "vendor 0x%x device 0x%x ERR func 1 " "(broken BIOS?)\n", PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR); - goto error; + return -ENODEV; } - /* Store device 16 funcs 1 and 2 */ - switch (PCI_FUNC(pdev->devfn)) { - case 1: - pvt->branchmap_werrors = pdev; - break; - case 2: - pvt->fsb_error_regs = pdev; + /* Store device 16 func 1 */ + if (PCI_FUNC(pdev->devfn) == 1) break; + } + pvt->branchmap_werrors = pdev; + + pdev = NULL; + while (1) { + pdev = pci_get_device(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_5400_ERR, pdev); + if (!pdev) { + /* End of list, leave */ + i5400_printk(KERN_ERR, + "'system address,Process Bus' " + "device not found:" + "vendor 0x%x device 0x%x ERR func 2 " + "(broken BIOS?)\n", + PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_5400_ERR); + + pci_dev_put(pvt->branchmap_werrors); + return -ENODEV; } + + /* Store device 16 func 2 */ + if (PCI_FUNC(pdev->devfn) == 2) + break; } + pvt->fsb_error_regs = pdev; debugf1("System Address, processor bus- PCI Bus ID: %s %x:%x\n", pci_name(pvt->system_address), @@ -778,7 +797,10 @@ static int i5400_get_devices(struct mem_ctl_info *mci, int dev_idx) "MC: 'BRANCH 0' device not found:" "vendor 0x%x device 0x%x Func 0 (broken BIOS?)\n", PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_FBD0); - goto error; + + pci_dev_put(pvt->fsb_error_regs); + pci_dev_put(pvt->branchmap_werrors); + return -ENODEV; } /* If this device claims to have more than 2 channels then @@ -796,14 +818,14 @@ static int i5400_get_devices(struct mem_ctl_info *mci, int dev_idx) "(broken BIOS?)\n", PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_FBD1); - goto error; + + pci_dev_put(pvt->branch_0); + pci_dev_put(pvt->fsb_error_regs); + pci_dev_put(pvt->branchmap_werrors); + return -ENODEV; } return 0; - -error: - i5400_put_devices(mci); - return -ENODEV; } /* |