leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: pcie, aer: refer mask state in mask register properly

Browse Source 
ERR_{,UN}CORRECTABLE_ERROR_MASK are set of error bits which linux know,
set of PCI_ERR_COR_* and PCI_ERR_UNC_* defined in linux/pci_regs.h.
This masks make aerdrv not to report errors of unknown bit, while aerdrv
have ability to report such undefined errors as "Unknown Error Bit %2d".

OTOH aerdrv_errprint does not have any check of setting in mask register.
So it could report masked wrong error by finding bit in status without
knowing that the bit is masked in the mask register.

This patch changes aerdrv to use mask state in mask register propely
instead of defined/hardcoded ERR_{,UN}CORRECTABLE_ERROR_MASK.
This change prevents aerdrv from reporting masked error, and also enable
reporting unknown errors.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto 2009-09-07 17:12:25 +09:00 committed by Jesse Barnes
parent 24dbb7beb2
commit 0d90c3ac0b
3 changed files with 17 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/pci/pcie/aer/aerdrv.h
View File

@ -47,9 +47,6 @@
#define AER_TLP_HEADER_VALID_FLAG 0x00000001
#define AER_MULTI_ERROR_VALID_FLAG 0x00000002
#define ERR_CORRECTABLE_ERROR_MASK 0x000031c1
#define ERR_UNCORRECTABLE_ERROR_MASK 0x001ff010
struct header_log_regs {
unsigned int dw0;
unsigned int dw1;
@ -65,6 +62,7 @@ struct aer_err_info {
int severity; /* 0:NONFATAL | 1:FATAL | 2:COR */
int flags;
unsigned int status; /* COR/UNCOR Error Status */
unsigned int mask; /* COR/UNCOR Error Mask */
struct header_log_regs tlp; /* TLP Header */
};

28
drivers/pci/pcie/aer/aerdrv_core.c
View File

@ -236,24 +236,16 @@ static int find_device_iter(struct pci_dev *dev, void *data)
status = 0;
mask = 0;
if (e_info->severity == AER_CORRECTABLE) {
pci_read_config_dword(dev,
pos + PCI_ERR_COR_STATUS,
&status);
pci_read_config_dword(dev,
pos + PCI_ERR_COR_MASK,
&mask);
if (status & ERR_CORRECTABLE_ERROR_MASK & ~mask) {
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &mask);
if (status & ~mask) {
add_error_device(e_info, dev);
goto added;
}
} else {
pci_read_config_dword(dev,
pos + PCI_ERR_UNCOR_STATUS,
&status);
pci_read_config_dword(dev,
pos + PCI_ERR_UNCOR_MASK,
&mask);
if (status & ERR_UNCORRECTABLE_ERROR_MASK & ~mask) {
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
if (status & ~mask) {
add_error_device(e_info, dev);
goto added;
}
@ -720,7 +712,9 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
if (info->severity == AER_CORRECTABLE) {
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
&info->status);
if (!(info->status & ERR_CORRECTABLE_ERROR_MASK))
pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK,
&info->mask);
if (!(info->status & ~info->mask))
return AER_UNSUCCESS;
} else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
info->severity == AER_NONFATAL) {
@ -728,7 +722,9 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
/* Link is still healthy for IO reads */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&info->status);
if (!(info->status & ERR_UNCORRECTABLE_ERROR_MASK))
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK,
&info->mask);
if (!(info->status & ~info->mask))
return AER_UNSUCCESS;
if (info->status & AER_LOG_TLP_MASKS) {

6
drivers/pci/pcie/aer/aerdrv_errprint.c
View File

@ -154,11 +154,13 @@ static char *aer_agent_string[] = {
static void aer_print_error_source(struct aer_err_info *info)
{
int i;
int i, status;
char *errmsg = NULL;
status = (info->status & ~info->mask);
for (i = 0; i < 32; i++) {
if (!(info->status & (1 << i)))
if (!(status & (1 << i)))
continue;
if (info->severity == AER_CORRECTABLE)