brcm80211: smac: remove smatch warnings from brcmsmac code

The patch fixes following smatch warnings:

main.c +2902 brcms_b_read_objmem(11) info: ignoring unreachable code.
mac80211_if.c +1146 brcms_suspend(8) error: we previously assumed 'wl'
could be null (see line 1145)
srom.c +641 _initvars_srom_pci(16) error: potential null dereference
'entry'.  (kzalloc returns null)

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
index c842797..fec0f10 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
@@ -1136,8 +1136,8 @@ static int brcms_suspend(struct bcma_device *pdev)
        hw = bcma_get_drvdata(pdev);
        wl = hw->priv;
        if (!wl) {
-               wiphy_err(wl->wiphy,
-                         "brcms_suspend: bcma_get_drvdata failed\n");
+               pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
+                      __func__);
                return -ENODEV;
        }
 

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/main.c b/drivers/net/wireless/brcm80211/brcmsmac/main.c
index fb712ca..86186fa 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmsmac/main.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c
@@ -2901,7 +2901,6 @@ brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset, u32 sel)
                objoff += 2;
 
        return bcma_read16(core, objoff);
-;
 }
 
 static void

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/srom.c b/drivers/net/wireless/brcm80211/brcmsmac/srom.c
index 5637436..b96f4b9 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmsmac/srom.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/srom.c
@@ -621,7 +621,7 @@ static inline void cpu_to_le16_buf(u16 *buf, uint nwords)
 /*
  * convert binary srom data into linked list of srom variable items.
  */
-static void
+static int
 _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list)
 {
        struct brcms_srom_list_head *entry;
@@ -638,6 +638,9 @@ _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list)
 
        /* first store the srom revision */
        entry = kzalloc(sizeof(struct brcms_srom_list_head), GFP_KERNEL);
+       if (!entry)
+               return -ENOMEM;
+
        entry->varid = BRCMS_SROM_REV;
        entry->var_type = BRCMS_SROM_UNUMBER;
        entry->uval = sromrev;
@@ -715,6 +718,8 @@ _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list)
 
                entry = kzalloc(sizeof(struct brcms_srom_list_head) +
                                extra_space, GFP_KERNEL);
+               if (!entry)
+                       return -ENOMEM;
                entry->varid = id;
                entry->var_type = type;
                if (flags & SRFL_ETHADDR) {
@@ -754,6 +759,8 @@ _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list)
                        entry =
                            kzalloc(sizeof(struct brcms_srom_list_head),
                                    GFP_KERNEL);
+                       if (!entry)
+                               return -ENOMEM;
                        entry->varid = srv->varid+p;
                        entry->var_type = BRCMS_SROM_UNUMBER;
                        entry->uval = val;
@@ -761,6 +768,7 @@ _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list)
                }
                pb += psz;
        }
+       return 0;
 }
 
 /*
@@ -906,7 +914,9 @@ int srom_var_init(struct si_pub *sih)
                INIT_LIST_HEAD(&sii->var_list);
 
                /* parse SROM into name=value pairs. */
-               _initvars_srom_pci(sromrev, srom, &sii->var_list);
+               err = _initvars_srom_pci(sromrev, srom, &sii->var_list);
+               if (err)
+                       srom_free_vars(sih);
        }
 
 errout: