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| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-11-08 20:13:16 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-12-07 13:22:35 +0100 |
| commit | a525cad241c339ca00bf7ebf03c5180f2a9b767c (patch) | |
| tree | c558a531e03509149906bd620b6d5c537ed2411b /drivers/mmc | |
| parent | 9e6e8c43726673ca2abcaac87640b9215fd72f4c (diff) | |
| download | linux-stable-a525cad241c339ca00bf7ebf03c5180f2a9b767c.tar.gz linux-stable-a525cad241c339ca00bf7ebf03c5180f2a9b767c.tar.bz2 linux-stable-a525cad241c339ca00bf7ebf03c5180f2a9b767c.zip | |
mmc: omap_hsmmc: fix return value check of mmc_add_host()
mmc_add_host() may return error, if we ignore its return value,
it will lead two issues:
1. The memory that allocated in mmc_alloc_host() is leaked.
2. In the remove() path, mmc_remove_host() will be called to
delete device, but it's not added yet, it will lead a kernel
crash because of null-ptr-deref in device_del().
Fix this by checking the return value and goto error path wihch
will call mmc_free_host().
Fixes: a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap hsmmc controller for 2430 and 34xx, v3")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221108121316.340354-1-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index fca30add563e..4bd744755205 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1946,7 +1946,9 @@ static int omap_hsmmc_probe(struct platform_device *pdev) if (!ret) mmc->caps |= MMC_CAP_SDIO_IRQ; - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto err_irq; if (mmc_pdata(host)->name != NULL) { ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |