From f15857569613a982568be88d034555d88eead0aa Mon Sep 17 00:00:00 2001 From: Hidetoshi Seto Date: Mon, 7 Sep 2009 17:08:59 +0900 Subject: [PATCH] PCI: pcie, aer: rework MASK macros in aerdrv_errprint.c Definitions of MASK macros in aerdrv_errprint.c are tricky and unsafe. For example, AER_AGENT_TRANSMITTER_MASK(_sev, _stat) does work like: static inline func(int _sev, int _stat) { if (_sev == AER_CORRECTABLE) return (_stat & (PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER)); else return (_stat & PCI_ERR_COR_REP_ROLL); } In case of else path here, for uncorrectable errors, testing bits in _stat by PCI_ERR_COR_* does not make sense because _stat should have only PCI_ERR_UNC_* bits originated in uncorrectable error status register. But at this time this is safe because uncorrectable error using bit position same to PCI_ERR_COR_REP_ROLL(= bit position 8) is not defined. Likewise, AER_AGENT_COMPLETER_MASK is always PCI_ERR_UNC_COMP_ABORT but it works because bit 15 of correctable error status is not defined. It means that these MASK macros will turn to be wrong once if new error is defined. (In fact, bit 15 of correctable is now defined in PCIe 2.1) This patch changes these MASK macros to be more strict, not to return PCI_ERR_COR_* bits for uncorrectable error status and vise versa. Signed-off-by: Hidetoshi Seto Reviewed-by: Andrew Patterson Signed-off-by: Jesse Barnes --- drivers/pci/pcie/aer/aerdrv_errprint.c | 46 ++++++++++++-------------- 1 file changed, 21 insertions(+), 25 deletions(-) diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c index 7fb5a2c71c6e..48f70fa7f684 100644 --- a/drivers/pci/pcie/aer/aerdrv_errprint.c +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -27,39 +27,35 @@ #define AER_AGENT_COMPLETER 2 #define AER_AGENT_TRANSMITTER 3 -#define AER_AGENT_REQUESTER_MASK (PCI_ERR_UNC_COMP_TIME| \ - PCI_ERR_UNC_UNSUP) - -#define AER_AGENT_COMPLETER_MASK PCI_ERR_UNC_COMP_ABORT - -#define AER_AGENT_TRANSMITTER_MASK(t, e) (e & (PCI_ERR_COR_REP_ROLL| \ - ((t == AER_CORRECTABLE) ? PCI_ERR_COR_REP_TIMER : 0))) +#define AER_AGENT_REQUESTER_MASK(t) ((t == AER_CORRECTABLE) ? \ + 0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP)) +#define AER_AGENT_COMPLETER_MASK(t) ((t == AER_CORRECTABLE) ? \ + 0 : PCI_ERR_UNC_COMP_ABORT) +#define AER_AGENT_TRANSMITTER_MASK(t) ((t == AER_CORRECTABLE) ? \ + (PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0) #define AER_GET_AGENT(t, e) \ - ((e & AER_AGENT_COMPLETER_MASK) ? AER_AGENT_COMPLETER : \ - (e & AER_AGENT_REQUESTER_MASK) ? AER_AGENT_REQUESTER : \ - (AER_AGENT_TRANSMITTER_MASK(t, e)) ? AER_AGENT_TRANSMITTER : \ + ((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER : \ + (e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER : \ + (e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER : \ AER_AGENT_RECEIVER) -#define AER_PHYSICAL_LAYER_ERROR_MASK PCI_ERR_COR_RCVR -#define AER_DATA_LINK_LAYER_ERROR_MASK(t, e) \ - (PCI_ERR_UNC_DLP| \ - PCI_ERR_COR_BAD_TLP| \ - PCI_ERR_COR_BAD_DLLP| \ - PCI_ERR_COR_REP_ROLL| \ - ((t == AER_CORRECTABLE) ? \ - PCI_ERR_COR_REP_TIMER : 0)) - #define AER_PHYSICAL_LAYER_ERROR 0 #define AER_DATA_LINK_LAYER_ERROR 1 #define AER_TRANSACTION_LAYER_ERROR 2 -#define AER_GET_LAYER_ERROR(t, e) \ - ((e & AER_PHYSICAL_LAYER_ERROR_MASK) ? \ - AER_PHYSICAL_LAYER_ERROR : \ - (e & AER_DATA_LINK_LAYER_ERROR_MASK(t, e)) ? \ - AER_DATA_LINK_LAYER_ERROR : \ - AER_TRANSACTION_LAYER_ERROR) +#define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \ + PCI_ERR_COR_RCVR : 0) +#define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \ + (PCI_ERR_COR_BAD_TLP| \ + PCI_ERR_COR_BAD_DLLP| \ + PCI_ERR_COR_REP_ROLL| \ + PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP) + +#define AER_GET_LAYER_ERROR(t, e) \ + ((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \ + (e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \ + AER_TRANSACTION_LAYER_ERROR) #define AER_PR(info, fmt, args...) \ printk("%s" fmt, (info->severity == AER_CORRECTABLE) ? \ -- 2.30.2