In i5000 and i5400 edac drivers, the register nrecmemb is defined as a 16 bits value which result in wrong shifts in the code: CHECK drivers/edac/i5000_edac.c drivers/edac/i5000_edac.c:485:15: warning: right shift by bigger than source value drivers/edac/i5000_edac.c:580:23: warning: right shift by bigger than source value CC drivers/edac/i5000_edac.o CHECK drivers/edac/i5400_edac.c drivers/edac/i5400_edac.c:391:36: warning: right shift by bigger than source value drivers/edac/i5400_edac.c:401:37: warning: right shift by bigger than source value CC drivers/edac/i5400_edac.o
In the datasheets ([1], section 3.9.22.20 and [2], section 3.9.22.21), this register is a 32 bits register. A u32 value for the register fixes the wrong shifts warnings and matches the datasheet. This patch also fixes the mask to access to the CAS bits [16 to 28] in the i5000 edac driver. [1]: https://www.intel.com/content/dam/doc/datasheet/5000p-5000v-5000z-chipset-memory-controller-hub-datasheet.pdf [2]: https://www.intel.se/content/dam/doc/datasheet/5400-chipset-memory-controller-hub-datasheet.pdf Signed-off-by: Jérémy Lefaure <jeremy.lefa...@lse.epita.fr> --- I have found this error thanks to the sparse tool. Please note that this patch hasn't been tested on real hardware. drivers/edac/i5000_edac.c | 6 +++--- drivers/edac/i5400_edac.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/edac/i5000_edac.c b/drivers/edac/i5000_edac.c index f683919981b0..c79016ade51e 100644 --- a/drivers/edac/i5000_edac.c +++ b/drivers/edac/i5000_edac.c @@ -227,7 +227,7 @@ #define NREC_RDWR(x) (((x)>>11) & 1) #define NREC_RANK(x) (((x)>>8) & 0x7) #define NRECMEMB 0xC0 -#define NREC_CAS(x) (((x)>>16) & 0xFFFFFF) +#define NREC_CAS(x) (((x)>>16) & 0x1FFF) #define NREC_RAS(x) ((x) & 0x7FFF) #define NRECFGLOG 0xC4 #define NREEECFBDA 0xC8 @@ -371,7 +371,7 @@ struct i5000_error_info { /* These registers are input ONLY if there was a * Non-Recoverable Error */ u16 nrecmema; /* Non-Recoverable Mem log A */ - u16 nrecmemb; /* Non-Recoverable Mem log B */ + u32 nrecmemb; /* Non-Recoverable Mem log B */ }; @@ -407,7 +407,7 @@ static void i5000_get_error_info(struct mem_ctl_info *mci, NERR_FAT_FBD, &info->nerr_fat_fbd); pci_read_config_word(pvt->branchmap_werrors, NRECMEMA, &info->nrecmema); - pci_read_config_word(pvt->branchmap_werrors, + pci_read_config_dword(pvt->branchmap_werrors, NRECMEMB, &info->nrecmemb); /* Clear the error bits, by writing them back */ diff --git a/drivers/edac/i5400_edac.c b/drivers/edac/i5400_edac.c index 37a9ba71da44..cd889edc8516 100644 --- a/drivers/edac/i5400_edac.c +++ b/drivers/edac/i5400_edac.c @@ -368,7 +368,7 @@ struct i5400_error_info { /* These registers are input ONLY if there was a Non-Rec Error */ u16 nrecmema; /* Non-Recoverable Mem log A */ - u16 nrecmemb; /* Non-Recoverable Mem log B */ + u32 nrecmemb; /* Non-Recoverable Mem log B */ }; @@ -458,7 +458,7 @@ static void i5400_get_error_info(struct mem_ctl_info *mci, NERR_FAT_FBD, &info->nerr_fat_fbd); pci_read_config_word(pvt->branchmap_werrors, NRECMEMA, &info->nrecmema); - pci_read_config_word(pvt->branchmap_werrors, + pci_read_config_dword(pvt->branchmap_werrors, NRECMEMB, &info->nrecmemb); /* Clear the error bits, by writing them back */ -- 2.13.1
