amd64_edac: Fix node id signedness

A node id can never be negative since we use it as an index into
the DRAM ranges array. This also makes one of the BUG_ON conditions
redundant.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

2 files changed, 11 insertions, 9 deletions

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 70e0f84be0d8..8d9def57232b 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -226,7 +226,8 @@ static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
  * returns true if the SysAddr given by sys_addr matches the
  * DRAM base/limit associated with node_id
  */
-static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr, int nid)
+static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr,
+                                   unsigned nid)
 {
         u64 addr;
 
@@ -252,7 +253,7 @@ static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
                                                 u64 sys_addr)
 {
         struct amd64_pvt *pvt;
-        int node_id;
+        unsigned node_id;
         u32 intlv_en, bits;
 
         /*
@@ -302,7 +303,7 @@ static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
         }
 
 found:
-        return edac_mc_find(node_id);
+        return edac_mc_find((int)node_id);
 
 err_no_match:
         debugf2("sys_addr 0x%lx doesn't match any node\n",
@@ -602,7 +603,7 @@ static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
 static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
 {
         struct amd64_pvt *pvt;
-        int node_id, intlv_shift;
+        unsigned node_id, intlv_shift;
         u64 bits, dram_addr;
         u32 intlv_sel;
 
@@ -616,7 +617,8 @@ static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
          */
         pvt = mci->pvt_info;
         node_id = pvt->mc_node_id;
-        BUG_ON((node_id < 0) || (node_id > 7));
+
+        BUG_ON(node_id > 7);
 
         intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
 
@@ -2147,7 +2149,7 @@ static int init_csrows(struct mem_ctl_info *mci)
 }
 
 /* get all cores on this DCT */
-static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, int nid)
+static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, unsigned nid)
 {
         int cpu;
 
@@ -2157,7 +2159,7 @@ static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, int nid)
 }
 
 /* check MCG_CTL on all the cpus on this node */
-static bool amd64_nb_mce_bank_enabled_on_node(int nid)
+static bool amd64_nb_mce_bank_enabled_on_node(unsigned nid)
 {
         cpumask_var_t mask;
         int cpu, nbe;
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index fe2cc3068d95..6220baeb3f1a 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -288,7 +288,7 @@
 #define MSR_MCGCTL_NBE                  BIT(4)
 
 /* AMD sets the first MC device at device ID 0x18. */
-static inline int get_node_id(struct pci_dev *pdev)
+static inline u8 get_node_id(struct pci_dev *pdev)
 {
         return PCI_SLOT(pdev->devfn) - 0x18;
 }
@@ -335,7 +335,7 @@ struct amd64_pvt {
         /* pci_device handles which we utilize */
         struct pci_dev *F1, *F2, *F3;
 
-        int mc_node_id;         /* MC index of this MC node */
+        unsigned mc_node_id;    /* MC index of this MC node */
         int ext_model;          /* extended model value of this node */
         int channel_count;