i7300_edac: Fix error flag testing

commit 7e06b7a3333f5c7a0cec12aff20d39c5c87c0795 upstream.

* Right-shift the values in GET_FBD_FAT_IDX and GET_FBD_NF_IDX, so
  that the callers get the result they expect.
* Fix definition of FERR_FAT_FBD_ERR_MASK.
* Call GET_FBD_NF_IDX, not GET_FBD_FAT_IDX, when operating on
  register FERR_NF_FBD. We were lucky they have the same definition.

This fixes kernel bug #44131:
https://bugzilla.kernel.org/show_bug.cgi?id=44131

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index 6104dba380b626443512a889fd6c66629f376092..2244df0b2ffb709080053832256a9036159974aa 100644 (file)
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -215,8 +215,8 @@ static const char *ferr_fat_fbd_name[] = {
        [0]  = "Memory Write error on non-redundant retry or "
               "FBD configuration Write error on retry",
 };
-#define GET_FBD_FAT_IDX(fbderr)        (fbderr & (3 << 28))
-#define FERR_FAT_FBD_ERR_MASK ((1 << 0) | (1 << 1) | (1 << 2) | (1 << 3))
+#define GET_FBD_FAT_IDX(fbderr)        (((fbderr) >> 28) & 3)
+#define FERR_FAT_FBD_ERR_MASK ((1 << 0) | (1 << 1) | (1 << 2) | (1 << 22))
 
 #define FERR_NF_FBD    0xa0
 static const char *ferr_nf_fbd_name[] = {
@@ -243,7 +243,7 @@ static const char *ferr_nf_fbd_name[] = {
        [1]  = "Aliased Uncorrectable Non-Mirrored Demand Data ECC",
        [0]  = "Uncorrectable Data ECC on Replay",
 };
-#define GET_FBD_NF_IDX(fbderr) (fbderr & (3 << 28))
+#define GET_FBD_NF_IDX(fbderr) (((fbderr) >> 28) & 3)
 #define FERR_NF_FBD_ERR_MASK ((1 << 24) | (1 << 23) | (1 << 22) | (1 << 21) |\
                              (1 << 18) | (1 << 17) | (1 << 16) | (1 << 15) |\
                              (1 << 14) | (1 << 13) | (1 << 11) | (1 << 10) |\
@@ -485,7 +485,7 @@ static void i7300_process_fbd_error(struct mem_ctl_info *mci)
                errnum = find_first_bit(&errors,
                                        ARRAY_SIZE(ferr_nf_fbd_name));
                specific = GET_ERR_FROM_TABLE(ferr_nf_fbd_name, errnum);
-               branch = (GET_FBD_FAT_IDX(error_reg) == 2) ? 1 : 0;
+               branch = (GET_FBD_NF_IDX(error_reg) == 2) ? 1 : 0;
 
                pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
                        REDMEMA, &syndrome);