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wcn36xx: Move hal_buf allocation to devm_kmalloc in probe 

[ Upstream commit ef48667557c53d4b51a1ee3090eab7699324c9de ]

Right now wcn->hal_buf is allocated in wcn36xx_start(). This is a problem
since we should have setup all of the buffers we required by the time
ieee80211_register_hw() is called.

struct ieee80211_ops callbacks may run prior to mac_start() and therefore
wcn->hal_buf must be initialized.

This is easily remediated by moving the allocation to probe() taking the
opportunity to tidy up freeing memory by using devm_kmalloc().

Fixes: 8e84c25821 ("wcn36xx: mac80211 driver for Qualcomm WCN3660/WCN3680 hardware")
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210605173347.2266003-1-bryan.odonoghue@linaro.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bryan O'Donoghue 2021-06-05 18:33:47 +01:00 committed by Greg Kroah-Hartman
parent 723204726a
commit 55ec3e5809
1 changed files with 8 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/net/wireless/ath/wcn36xx/main.c
View File

@ -293,23 +293,16 @@ static int wcn36xx_start(struct ieee80211_hw *hw)
goto out_free_dxe_pool;
}
wcn->hal_buf = kmalloc(WCN36XX_HAL_BUF_SIZE, GFP_KERNEL);
if (!wcn->hal_buf) {
wcn36xx_err("Failed to allocate smd buf\n");
ret = -ENOMEM;
goto out_free_dxe_ctl;
}
ret = wcn36xx_smd_load_nv(wcn);
if (ret) {
wcn36xx_err("Failed to push NV to chip\n");
goto out_free_smd_buf;
goto out_free_dxe_ctl;
}
ret = wcn36xx_smd_start(wcn);
if (ret) {
wcn36xx_err("Failed to start chip\n");
goto out_free_smd_buf;
goto out_free_dxe_ctl;
}
if (!wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
@ -336,8 +329,6 @@ static int wcn36xx_start(struct ieee80211_hw *hw)
out_smd_stop:
wcn36xx_smd_stop(wcn);
out_free_smd_buf:
kfree(wcn->hal_buf);
out_free_dxe_ctl:
wcn36xx_dxe_free_ctl_blks(wcn);
out_free_dxe_pool:
@ -374,8 +365,6 @@ static void wcn36xx_stop(struct ieee80211_hw *hw)
wcn36xx_dxe_free_mem_pools(wcn);
wcn36xx_dxe_free_ctl_blks(wcn);
kfree(wcn->hal_buf);
}
static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
@ -1322,6 +1311,12 @@ static int wcn36xx_probe(struct platform_device *pdev)
mutex_init(&wcn->hal_mutex);
mutex_init(&wcn->scan_lock);
wcn->hal_buf = devm_kmalloc(wcn->dev, WCN36XX_HAL_BUF_SIZE, GFP_KERNEL);
if (!wcn->hal_buf) {
ret = -ENOMEM;
goto out_wq;
}
ret = dma_set_mask_and_coherent(wcn->dev, DMA_BIT_MASK(32));
if (ret < 0) {
wcn36xx_err("failed to set DMA mask: %d\n", ret);