Thread (4 messages) 4 messages, 4 authors, 2020-08-27

Re: [PATCH] [v2] wilc1000: Fix memleak in wilc_sdio_probe

From: <hidden>
Date: 2020-08-25 08:11:28
Also in: lkml, netdev


On 20.08.2020 08:48, Dinghao Liu wrote:
quoted hunk ↗ jump to hunk
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When devm_clk_get() returns -EPROBE_DEFER, sdio_priv
should be freed just like when wilc_cfg80211_init()
fails.

Fixes: 8692b047e86cf ("staging: wilc1000: look for rtc_clk clock")
Signed-off-by: Dinghao Liu <redacted>
---

Changelog:

v2: - Remove 'staging' prefix in subject.
---
 drivers/net/wireless/microchip/wilc1000/sdio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index 3ece7b0b0392..351ff909ab1c 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -149,9 +149,10 @@ static int wilc_sdio_probe(struct sdio_func *func,
        wilc->dev = &func->dev;

        wilc->rtc_clk = devm_clk_get(&func->card->dev, "rtc");
-       if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER)
+       if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER) {
+               kfree(sdio_priv);
The proper way to free resources here would be to call
wilc_netdev_cleanup() which will free all objects allocated by
wilc_cfg80211_init() and will also free sdio_priv. I personally would go
further and remove the kfree(wilc->bus_data) from wilc_netdev_cleanup() and
keep it in the wilc_sdio_probe(), wilc_spi_probe() where it was actually
allocated.
                return -EPROBE_DEFER;
-       else if (!IS_ERR(wilc->rtc_clk))
+       } else if (!IS_ERR(wilc->rtc_clk))
                clk_prepare_enable(wilc->rtc_clk);

        dev_info(&func->dev, "Driver Initializing success\n");
--
2.17.1
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