[PATCH v3 2/4] staging: wilc1000: validate cfg parameters before scheduling the work

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From: Adham Abozaeid <adham.abozaeid@xxxxxxxxxxxx>

Validate cfg parameters after being called by cfg80211 in set_wiphy_params
before scheduling the work executed in handle_cfg_param

Signed-off-by: Adham Abozaeid <adham.abozaeid@xxxxxxxxxxxxx>
---
 drivers/staging/wilc1000/host_interface.c     | 61 ++++++-------------
 .../staging/wilc1000/wilc_wfi_cfgoperations.c | 50 ++++++++++++---
 2 files changed, 62 insertions(+), 49 deletions(-)

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index b89116c57064..c1215c194907 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -377,61 +377,41 @@ static void handle_cfg_param(struct work_struct *work)
 	if (param->flag & RETRY_SHORT) {
 		u16 retry_limit = param->short_retry_limit;
 
-		if (retry_limit > 0 && retry_limit < 256) {
-			wid_list[i].id = WID_SHORT_RETRY_LIMIT;
-			wid_list[i].val = (s8 *)&param->short_retry_limit;
-			wid_list[i].type = WID_SHORT;
-			wid_list[i].size = sizeof(u16);
-			hif_drv->cfg_values.short_retry_limit = retry_limit;
-		} else {
-			netdev_err(vif->ndev, "Range(1~256) over\n");
-			goto unlock;
-		}
+		wid_list[i].id = WID_SHORT_RETRY_LIMIT;
+		wid_list[i].val = (s8 *)&param->short_retry_limit;
+		wid_list[i].type = WID_SHORT;
+		wid_list[i].size = sizeof(u16);
+		hif_drv->cfg_values.short_retry_limit = retry_limit;
 		i++;
 	}
 	if (param->flag & RETRY_LONG) {
 		u16 limit = param->long_retry_limit;
 
-		if (limit > 0 && limit < 256) {
-			wid_list[i].id = WID_LONG_RETRY_LIMIT;
-			wid_list[i].val = (s8 *)&param->long_retry_limit;
-			wid_list[i].type = WID_SHORT;
-			wid_list[i].size = sizeof(u16);
-			hif_drv->cfg_values.long_retry_limit = limit;
-		} else {
-			netdev_err(vif->ndev, "Range(1~256) over\n");
-			goto unlock;
-		}
+		wid_list[i].id = WID_LONG_RETRY_LIMIT;
+		wid_list[i].val = (s8 *)&param->long_retry_limit;
+		wid_list[i].type = WID_SHORT;
+		wid_list[i].size = sizeof(u16);
+		hif_drv->cfg_values.long_retry_limit = limit;
 		i++;
 	}
 	if (param->flag & FRAG_THRESHOLD) {
 		u16 frag_th = param->frag_threshold;
 
-		if (frag_th > 255 && frag_th < 7937) {
-			wid_list[i].id = WID_FRAG_THRESHOLD;
-			wid_list[i].val = (s8 *)&param->frag_threshold;
-			wid_list[i].type = WID_SHORT;
-			wid_list[i].size = sizeof(u16);
-			hif_drv->cfg_values.frag_threshold = frag_th;
-		} else {
-			netdev_err(vif->ndev, "Threshold Range fail\n");
-			goto unlock;
-		}
+		wid_list[i].id = WID_FRAG_THRESHOLD;
+		wid_list[i].val = (s8 *)&param->frag_threshold;
+		wid_list[i].type = WID_SHORT;
+		wid_list[i].size = sizeof(u16);
+		hif_drv->cfg_values.frag_threshold = frag_th;
 		i++;
 	}
 	if (param->flag & RTS_THRESHOLD) {
 		u16 rts_th = param->rts_threshold;
 
-		if (rts_th > 255) {
-			wid_list[i].id = WID_RTS_THRESHOLD;
-			wid_list[i].val = (s8 *)&param->rts_threshold;
-			wid_list[i].type = WID_SHORT;
-			wid_list[i].size = sizeof(u16);
-			hif_drv->cfg_values.rts_threshold = rts_th;
-		} else {
-			netdev_err(vif->ndev, "Threshold Range fail\n");
-			goto unlock;
-		}
+		wid_list[i].id = WID_RTS_THRESHOLD;
+		wid_list[i].val = (s8 *)&param->rts_threshold;
+		wid_list[i].type = WID_SHORT;
+		wid_list[i].size = sizeof(u16);
+		hif_drv->cfg_values.rts_threshold = rts_th;
 		i++;
 	}
 
@@ -441,7 +421,6 @@ static void handle_cfg_param(struct work_struct *work)
 	if (ret)
 		netdev_err(vif->ndev, "Error in setting CFG params\n");
 
-unlock:
 	mutex_unlock(&hif_drv->cfg_values_lock);
 	kfree(msg);
 }
diff --git a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
index 4fbbbbd5a64b..26bb78a49d81 100644
--- a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
+++ b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
@@ -1149,21 +1149,55 @@ static int set_wiphy_params(struct wiphy *wiphy, u32 changed)
 	cfg_param_val.flag = 0;
 
 	if (changed & WIPHY_PARAM_RETRY_SHORT) {
-		cfg_param_val.flag  |= RETRY_SHORT;
-		cfg_param_val.short_retry_limit = wiphy->retry_short;
+		if (wiphy->retry_short > 0 && wiphy->retry_short < 256) {
+			netdev_dbg(vif->ndev,
+				   "Setting WIPHY_PARAM_RETRY_SHORT %d\n",
+				   wiphy->retry_short);
+			cfg_param_val.flag  |= RETRY_SHORT;
+			cfg_param_val.short_retry_limit = wiphy->retry_short;
+		} else {
+			netdev_err(vif->ndev, "Short retry limit out of range\n");
+			return -EINVAL;
+		}
 	}
 	if (changed & WIPHY_PARAM_RETRY_LONG) {
-		cfg_param_val.flag |= RETRY_LONG;
-		cfg_param_val.long_retry_limit = wiphy->retry_long;
+		if (wiphy->retry_long > 0 && wiphy->retry_long < 256) {
+			netdev_dbg(vif->ndev,
+				   "Setting WIPHY_PARAM_RETRY_LONG %d\n",
+				   wiphy->retry_long);
+			cfg_param_val.flag |= RETRY_LONG;
+			cfg_param_val.long_retry_limit = wiphy->retry_long;
+		} else {
+			netdev_err(vif->ndev, "Long retry limit out of range\n");
+			return -EINVAL;
+		}
 	}
 	if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
-		cfg_param_val.flag |= FRAG_THRESHOLD;
-		cfg_param_val.frag_threshold = wiphy->frag_threshold;
+		if (wiphy->frag_threshold > 255 &&
+		    wiphy->frag_threshold < 7937) {
+			netdev_dbg(vif->ndev,
+				   "Setting WIPHY_PARAM_FRAG_THRESHOLD %d\n",
+				   wiphy->frag_threshold);
+			cfg_param_val.flag |= FRAG_THRESHOLD;
+			cfg_param_val.frag_threshold = wiphy->frag_threshold;
+		} else {
+			netdev_err(vif->ndev,
+				   "Fragmentation threshold out of range\n");
+			return -EINVAL;
+		}
 	}
 
 	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
-		cfg_param_val.flag |= RTS_THRESHOLD;
-		cfg_param_val.rts_threshold = wiphy->rts_threshold;
+		if (wiphy->rts_threshold > 255) {
+			netdev_dbg(vif->ndev,
+				   "Setting WIPHY_PARAM_RTS_THRESHOLD %d\n",
+				   wiphy->rts_threshold);
+			cfg_param_val.flag |= RTS_THRESHOLD;
+			cfg_param_val.rts_threshold = wiphy->rts_threshold;
+		} else {
+			netdev_err(vif->ndev, "RTS threshold out of range\n");
+			return -EINVAL;
+		}
 	}
 
 	ret = wilc_hif_set_cfg(vif, &cfg_param_val);
-- 
2.17.1

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