Divide tricky for-loop into readable if-blocks.
The logic to set multi_error_valid (to force walking pci bus
hierarchy to find 2nd~ error devices) is changed too, to check
MULTI_{,_UN}COR_RCV bit individually and to force walk only when
it is required.
And rework setting e_info->severity for uncorrectable, not to use
magic numbers.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
---
drivers/pci/pcie/aer/aerdrv_core.c | 49 +++++++++++++++++++----------------
1 files changed, 27 insertions(+), 22 deletions(-)
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 6fd8f55..b1965b0 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -217,7 +217,7 @@ found:
/**
* find_source_device - search through device hierarchy for source device
* @parent: pointer to Root Port pci_dev data structure
- * @e_info: including detailed error information such like id
+ * @e_info: scratched but includes detailed error information such like id
*
* Return 1 if found, otherwise 0.
*
@@ -229,6 +229,9 @@ static int find_source_device(struct pci_dev *parent,
struct pci_dev *dev = parent;
int result;
+ /* Must reset before use, other than id, severity, multi_error_valid */
+ e_info->error_dev_num = 0;
+
/* Is Root Port an agent that sends error message? */
result = find_device_iter(dev, e_info);
if (result)
@@ -744,11 +747,10 @@ static void aer_isr_one_error(struct pcie_device *p_device,
struct aer_err_source *e_src)
{
struct aer_err_info *e_info;
- int i;
/* struct aer_err_info might be big, so we allocate it with slab */
e_info = kmalloc(sizeof(struct aer_err_info), GFP_KERNEL);
- if (e_info == NULL) {
+ if (!e_info) {
dev_printk(KERN_DEBUG, &p_device->port->dev,
"Can't allocate mem when processing AER errors\n");
return;
@@ -758,25 +760,28 @@ static void aer_isr_one_error(struct pcie_device *p_device,
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.
*/
- for (i = 1; i & ROOT_ERR_STATUS_MASKS ; i <<= 2) {
- if (i > 4)
- break;
- if (!(e_src->status & i))
- continue;
-
- memset(e_info, 0, sizeof(struct aer_err_info));
-
- /* Init comprehensive error information */
- if (i & PCI_ERR_ROOT_COR_RCV) {
- e_info->id = ERR_COR_ID(e_src->id);
- e_info->severity = AER_CORRECTABLE;
- } else {
- e_info->id = ERR_UNCOR_ID(e_src->id);
- e_info->severity = ((e_src->status >> 6) & 1);
- }
- if (e_src->status &
- (PCI_ERR_ROOT_MULTI_COR_RCV |
- PCI_ERR_ROOT_MULTI_UNCOR_RCV))
+ if (e_src->status & PCI_ERR_ROOT_COR_RCV) {
+ e_info->id = ERR_COR_ID(e_src->id);
+ e_info->severity = AER_CORRECTABLE;
+
+ if (e_src->status & PCI_ERR_ROOT_MULTI_COR_RCV)
+ e_info->multi_error_valid = 1;
+
+ aer_print_port_info(p_device->port, e_info);
+
+ if (find_source_device(p_device->port, e_info))
+ aer_process_err_devices(p_device, e_info);
+ }
+
+ if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
+ e_info->id = ERR_UNCOR_ID(e_src->id);
+
+ if (e_src->status & PCI_ERR_ROOT_FATAL_RCV)
+ e_info->severity = AER_FATAL;
+ else
+ e_info->severity = AER_NONFATAL;
+
+ if (e_src->status & PCI_ERR_ROOT_MULTI_UNCOR_RCV)
e_info->multi_error_valid = 1;
aer_print_port_info(p_device->port, e_info);
--
1.7.0.4
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