* [v2] edac, i5000, i5400: fix definition of nrecmemb register
@ 2017-06-29 0:57 Jérémy Lefaure
0 siblings, 0 replies; 2+ messages in thread
From: Jérémy Lefaure @ 2017-06-29 0:57 UTC (permalink / raw)
To: Borislav Petkov, Mauro Carvalho Chehab
Cc: Jérémy Lefaure, linux-edac, linux-kernel
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 [27:16] 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.lefaure@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.
v2:
* fix mask in NREC_CAS macro (0xFFF instead of 0x1FFF)
* fix bits description ("[27:16] instead of "[16 to 28]") in commit message
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..8f5a56e25bd2 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) & 0xFFF)
#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 */
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [v2] edac, i5000, i5400: fix definition of nrecmemb register
@ 2017-06-29 8:36 Borislav Petkov
0 siblings, 0 replies; 2+ messages in thread
From: Borislav Petkov @ 2017-06-29 8:36 UTC (permalink / raw)
To: Jérémy Lefaure; +Cc: Mauro Carvalho Chehab, linux-edac, linux-kernel
On Wed, Jun 28, 2017 at 08:57:29PM -0400, Jérémy Lefaure wrote:
> 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 [27:16] 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.lefaure@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.
>
> v2:
> * fix mask in NREC_CAS macro (0xFFF instead of 0x1FFF)
> * fix bits description ("[27:16] instead of "[16 to 28]") in commit message
>
>
> drivers/edac/i5000_edac.c | 6 +++---
> drivers/edac/i5400_edac.c | 4 ++--
> 2 files changed, 5 insertions(+), 5 deletions(-)
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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