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path: root/drivers/edac/pnd2_edac.c
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Diffstat (limited to 'drivers/edac/pnd2_edac.c')
-rw-r--r--drivers/edac/pnd2_edac.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 1cad5a9af8d0..8e599490f6de 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -131,7 +131,7 @@ static struct mem_ctl_info *pnd2_mci;
#ifdef CONFIG_X86_INTEL_SBI_APL
#include "linux/platform_data/sbi_apl.h"
-int sbi_send(int port, int off, int op, u32 *data)
+static int sbi_send(int port, int off, int op, u32 *data)
{
struct sbi_apl_message sbi_arg;
int ret, read = 0;
@@ -160,7 +160,7 @@ int sbi_send(int port, int off, int op, u32 *data)
return ret;
}
#else
-int sbi_send(int port, int off, int op, u32 *data)
+static int sbi_send(int port, int off, int op, u32 *data)
{
return -EUNATCH;
}
@@ -168,14 +168,15 @@ int sbi_send(int port, int off, int op, u32 *data)
static int apl_rd_reg(int port, int off, int op, void *data, size_t sz, char *name)
{
- int ret = 0;
+ int ret = 0;
edac_dbg(2, "Read %s port=%x off=%x op=%x\n", name, port, off, op);
switch (sz) {
case 8:
ret = sbi_send(port, off + 4, op, (u32 *)(data + 4));
+ /* fall through */
case 4:
- ret = sbi_send(port, off, op, (u32 *)data);
+ ret |= sbi_send(port, off, op, (u32 *)data);
pnd2_printk(KERN_DEBUG, "%s=%x%08x ret=%d\n", name,
sz == 8 ? *((u32 *)(data + 4)) : 0, *((u32 *)data), ret);
break;
@@ -423,16 +424,21 @@ static void dnv_mk_region(char *name, struct region *rp, void *asym)
static int apl_get_registers(void)
{
+ int ret = -ENODEV;
int i;
if (RD_REG(&asym_2way, b_cr_asym_2way_mem_region_mchbar))
return -ENODEV;
+ /*
+ * RD_REGP() will fail for unpopulated or non-existent
+ * DIMM slots. Return success if we find at least one DIMM.
+ */
for (i = 0; i < APL_NUM_CHANNELS; i++)
- if (RD_REGP(&drp0[i], d_cr_drp0, apl_dports[i]))
- return -ENODEV;
+ if (!RD_REGP(&drp0[i], d_cr_drp0, apl_dports[i]))
+ ret = 0;
- return 0;
+ return ret;
}
static int dnv_get_registers(void)