From: Qiuxu Zhuo qiuxu.zhuo@intel.com
commit 83ff51c4e3fecf6b8587ce4d46f6eac59f5d7c5a upstream.
Instead of raw access, use readl() to access MMIO registers of memory controller to avoid possible compiler re-ordering.
Fixes: d4dc89d069aa ("EDAC, i10nm: Add a driver for Intel 10nm server processors") Cc: stable@vger.kernel.org Signed-off-by: Qiuxu Zhuo qiuxu.zhuo@intel.com Signed-off-by: Tony Luck tony.luck@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/edac/i10nm_base.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
--- a/drivers/edac/i10nm_base.c +++ b/drivers/edac/i10nm_base.c @@ -6,6 +6,7 @@ */
#include <linux/kernel.h> +#include <linux/io.h> #include <asm/cpu_device_id.h> #include <asm/intel-family.h> #include <asm/mce.h> @@ -19,14 +20,16 @@ #define i10nm_printk(level, fmt, arg...) \ edac_printk(level, "i10nm", fmt, ##arg)
-#define I10NM_GET_SCK_BAR(d, reg) \ +#define I10NM_GET_SCK_BAR(d, reg) \ pci_read_config_dword((d)->uracu, 0xd0, &(reg)) #define I10NM_GET_IMC_BAR(d, i, reg) \ pci_read_config_dword((d)->uracu, 0xd8 + (i) * 4, &(reg)) #define I10NM_GET_DIMMMTR(m, i, j) \ - (*(u32 *)((m)->mbase + 0x2080c + (i) * 0x4000 + (j) * 4)) + readl((m)->mbase + 0x2080c + (i) * 0x4000 + (j) * 4) #define I10NM_GET_MCDDRTCFG(m, i, j) \ - (*(u32 *)((m)->mbase + 0x20970 + (i) * 0x4000 + (j) * 4)) + readl((m)->mbase + 0x20970 + (i) * 0x4000 + (j) * 4) +#define I10NM_GET_MCMTR(m, i) \ + readl((m)->mbase + 0x20ef8 + (i) * 0x4000)
#define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23) #define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12) @@ -148,7 +151,7 @@ static bool i10nm_check_ecc(struct skx_i { u32 mcmtr;
- mcmtr = *(u32 *)(imc->mbase + 0x20ef8 + chan * 0x4000); + mcmtr = I10NM_GET_MCMTR(imc, chan); edac_dbg(1, "ch%d mcmtr reg %x\n", chan, mcmtr);
return !!GET_BITFIELD(mcmtr, 2, 2);