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Message-Id: <20180118143356.14290-1-rfried@codeaurora.org>
Date: Thu, 18 Jan 2018 16:33:56 +0200
From: Ramon Fried <rfried@...eaurora.org>
To: k.eugene.e@...il.com, kvalo@...eaurora.org,
bjorn.andersson@...aro.org, wcn36xx@...ts.infradead.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc: Ramon Fried <rfried@...eaurora.org>
Subject: [PATCH] wcn36xx: release resources in case of error
wcn36xx_dxe_init() doesn't check for the return value
of wcn36xx_dxe_init_descs().
This patch releases the resources in case an error ocurred.
Signed-off-by: Ramon Fried <rfried@...eaurora.org>
---
drivers/net/wireless/ath/wcn36xx/dxe.c | 48 +++++++++++++++++++++++++++++-----
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index d5c810a8cc52..dc7129edac96 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -236,6 +236,16 @@ static int wcn36xx_dxe_init_descs(struct device *dev, struct wcn36xx_dxe_ch *wcn
return 0;
}
+static void wcn36xx_dxe_deinit_descs(struct device *dev, struct wcn36xx_dxe_ch *wcn_ch)
+{
+ size_t size;
+
+ size = wcn_ch->desc_bum * sizeof(struct wcn36xx_dxe_desc);
+ dma_free_coherent(wcn->dev, size,
+ wcn_ch->cpu_addr,
+ wcn_ch->dma_addr);
+}
+
static void wcn36xx_dxe_init_tx_bd(struct wcn36xx_dxe_ch *ch,
struct wcn36xx_dxe_mem_pool *pool)
{
@@ -722,7 +732,11 @@ int wcn36xx_dxe_init(struct wcn36xx *wcn)
/***************************************/
/* Init descriptors for TX LOW channel */
/***************************************/
- wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_tx_l_ch);
+ ret = wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_tx_l_ch);
+ if (ret) {
+ dev_error("Error allocating descriptor\n");
+ return ret;
+ }
wcn36xx_dxe_init_tx_bd(&wcn->dxe_tx_l_ch, &wcn->data_mem_pool);
/* Write channel head to a NEXT register */
@@ -740,7 +754,12 @@ int wcn36xx_dxe_init(struct wcn36xx *wcn)
/***************************************/
/* Init descriptors for TX HIGH channel */
/***************************************/
- wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_tx_h_ch);
+ ret = wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_tx_h_ch);
+ if (ret) {
+ dev_error("Error allocating descriptor\n");
+ goto our_err_txh_ch;
+ }
+
wcn36xx_dxe_init_tx_bd(&wcn->dxe_tx_h_ch, &wcn->mgmt_mem_pool);
/* Write channel head to a NEXT register */
@@ -760,7 +779,12 @@ int wcn36xx_dxe_init(struct wcn36xx *wcn)
/***************************************/
/* Init descriptors for RX LOW channel */
/***************************************/
- wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_rx_l_ch);
+ ret = wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_rx_l_ch);
+ if (ret) {
+ dev_error("Error allocating descriptor\n");
+ goto out_err_rxl_ch;
+ }
+
/* For RX we need to preallocated buffers */
wcn36xx_dxe_ch_alloc_skb(wcn, &wcn->dxe_rx_l_ch);
@@ -790,7 +814,11 @@ int wcn36xx_dxe_init(struct wcn36xx *wcn)
/***************************************/
/* Init descriptors for RX HIGH channel */
/***************************************/
- wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_rx_h_ch);
+ ret = wcn36xx_dxe_init_descs(wcn->dev, &wcn->dxe_rx_h_ch)
+ if (ret) {
+ dev_error("Error allocating descriptor\n");
+ goto out_err_rxh_ch;
+ }
/* For RX we need to prealocat buffers */
wcn36xx_dxe_ch_alloc_skb(wcn, &wcn->dxe_rx_h_ch);
@@ -819,11 +847,19 @@ int wcn36xx_dxe_init(struct wcn36xx *wcn)
ret = wcn36xx_dxe_request_irqs(wcn);
if (ret < 0)
- goto out_err;
+ goto out_err_irq;
return 0;
-out_err:
+out_err_irq:
+ wcn36xx_dxe_deinit_descs(wcn->dev, &wcn->dxe_rx_h_ch);
+out_err_rxh_ch:
+ wcn36xx_dxe_deinit_descs(wcn->dev, &wcn->dxe_rx_l_ch);
+out_err_rxl_ch:
+ wcn36xx_dxe_deinit_descs(wcn->dev, &wcn->dxe_tx_h_ch);
+out_err_txh_ch:
+ wcn36xx_dxe_deinit_descs(wcn->dev, &wcn->dxe_tx_l_ch);
+
return ret;
}
--
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