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spi: spi-fsl-qspi: check return value after calling platform_get_resource_byname()

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[ Upstream commit a2b331ac11e1cac56f5b7d367e9f3c5796deaaed ]

It will cause null-ptr-deref if platform_get_resource_byname() returns NULL,
we need check the return value.

Fixes: 858e26a515 ("spi: spi-fsl-qspi: Reduce devm_ioremap size to 4 times AHB buffer size")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220505093954.1285615-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-05-05 17:39:54 +08:00 committed by Greg Kroah-Hartman
parent f40549ce20
commit 560dcbe1c7
1 changed files with 4 additions and 0 deletions
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4
drivers/spi/spi-fsl-qspi.c
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@ -876,6 +876,10 @@ static int fsl_qspi_probe(struct platform_device *pdev)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"QuadSPI-memory");
if (!res) {
ret = -EINVAL;
goto err_put_ctrl;
}
q->memmap_phy = res->start;
/* Since there are 4 cs, map size required is 4 times ahb_buf_size */
q->ahb_addr = devm_ioremap(dev, q->memmap_phy,