diff options
| author |   Gavin Shan <shangw@linux.vnet.ibm.com> | 2013-07-24 10:24:56 +0800 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-07-24 14:18:47 +1000 |
| commit | 9feed42e93d2625db86423cedf8b4b2bed00779e (patch) | |
| tree | b0b7601fdd59bacaa9bbfb84b941eefe0ba1043b /arch | |
| parent | powerpc/eeh: Keep PE during hotplug (diff) | |
| download | linux-dev-9feed42e93d2625db86423cedf8b4b2bed00779e.tar.xz linux-dev-9feed42e93d2625db86423cedf8b4b2bed00779e.zip | |
powerpc/eeh: Use safe list traversal when walking EEH devices
Currently, we're trasversing the EEH devices list using list_for_each_entry().
That's not safe enough because the EEH devices might be removed from
its parent PE while doing iteration. The patch replaces that with
list_for_each_entry_safe().
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/eeh.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/eeh_pe.c | 10 |
3 files changed, 9 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 2ce22d7b71a0..e8c411b63caf 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -74,8 +74,8 @@ struct eeh_pe { struct list_head child; /* Child PEs */ }; -#define eeh_pe_for_each_dev(pe, edev) \ - list_for_each_entry(edev, &pe->edevs, list) +#define eeh_pe_for_each_dev(pe, edev, tmp) \ + list_for_each_entry_safe(edev, tmp, &pe->edevs, list) /* * The struct is used to trace EEH state for the associated diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index ce81477316be..56bd4584f61f 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -231,7 +231,7 @@ static size_t eeh_gather_pci_data(struct eeh_dev *edev, char * buf, size_t len) void eeh_slot_error_detail(struct eeh_pe *pe, int severity) { size_t loglen = 0; - struct eeh_dev *edev; + struct eeh_dev *edev, *tmp; bool valid_cfg_log = true; /* @@ -251,7 +251,7 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity) eeh_pe_restore_bars(pe); pci_regs_buf[0] = 0; - eeh_pe_for_each_dev(pe, edev) { + eeh_pe_for_each_dev(pe, edev, tmp) { loglen += eeh_gather_pci_data(edev, pci_regs_buf + loglen, EEH_PCI_REGS_LOG_LEN - loglen); } diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c index 32ef40940bad..c8b815e45c8f 100644 --- a/arch/powerpc/kernel/eeh_pe.c +++ b/arch/powerpc/kernel/eeh_pe.c @@ -176,7 +176,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root, eeh_traverse_func fn, void *flag) { struct eeh_pe *pe; - struct eeh_dev *edev; + struct eeh_dev *edev, *tmp; void *ret; if (!root) { @@ -186,7 +186,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root, /* Traverse root PE */ for (pe = root; pe; pe = eeh_pe_next(pe, root)) { - eeh_pe_for_each_dev(pe, edev) { + eeh_pe_for_each_dev(pe, edev, tmp) { ret = fn(edev, flag); if (ret) return ret; @@ -501,7 +501,7 @@ static void *__eeh_pe_state_mark(void *data, void *flag) { struct eeh_pe *pe = (struct eeh_pe *)data; int state = *((int *)flag); - struct eeh_dev *tmp; + struct eeh_dev *edev, *tmp; struct pci_dev *pdev; /* @@ -511,8 +511,8 @@ static void *__eeh_pe_state_mark(void *data, void *flag) * the PCI device driver. */ pe->state |= state; - eeh_pe_for_each_dev(pe, tmp) { - pdev = eeh_dev_to_pci_dev(tmp); + eeh_pe_for_each_dev(pe, edev, tmp) { + pdev = eeh_dev_to_pci_dev(edev); if (pdev) pdev->error_state = pci_channel_io_frozen; } |