staging: brcm80211: bugfix for len==0 parameter in 3 fullmac functions

Three functions use the same method to check incoming parameters. The
'len' parameter can be equal to 0 in case of a 'set' operation.
Currently these functions return an error code under that condition,
which is incorrect. The problem was introduced in recent patches in
which asserts were removed from the fullmac.

Despite this being a bug, my regression testing has not shown any problems.

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c b/drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c
index 38bd9ba..e345af7 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c
+++ b/drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c
@@ -407,7 +407,7 @@ brcmf_sdioh_iovar_op(struct sdioh_info *si, const char *name,
        bool bool_val;
        u32 actionid;
 
-       if (name == NULL || len <= 0)
+       if (name == NULL || len < 0)
                return -EINVAL;
 
        /* Set does not take qualifiers */

diff --git a/drivers/staging/brcm80211/brcmfmac/dhd_common.c b/drivers/staging/brcm80211/brcmfmac/dhd_common.c
index fdec468..1e757b7 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/dhd_common.c
+++ b/drivers/staging/brcm80211/brcmfmac/dhd_common.c
@@ -311,7 +311,7 @@ brcmf_c_iovar_op(struct brcmf_pub *drvr, const char *name,
 
        BRCMF_TRACE(("%s: Enter\n", __func__));
 
-       if (name == NULL || len <= 0)
+       if (name == NULL || len < 0)
                return -EINVAL;
 
        /* Set does not take qualifiers */

diff --git a/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c b/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
index 7fa95b6..acad298 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
@@ -3123,7 +3123,7 @@ brcmf_sdbrcm_bus_iovar_op(struct brcmf_pub *drvr, const char *name,
 
        BRCMF_TRACE(("%s: Enter\n", __func__));
 
-       if (name == NULL || len <= 0)
+       if (name == NULL || len < 0)
                return -EINVAL;
 
        /* Set does not take qualifiers */