Commit a2b331ac authored by Yang Yingliang's avatar Yang Yingliang Committed by Mark Brown

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

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

Fixes: 858e26a5 ("spi: spi-fsl-qspi: Reduce devm_ioremap size to 4 times AHB buffer size")
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220505093954.1285615-1-yangyingliang@huawei.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent 2cd757e6
...@@ -876,6 +876,10 @@ static int fsl_qspi_probe(struct platform_device *pdev) ...@@ -876,6 +876,10 @@ static int fsl_qspi_probe(struct platform_device *pdev)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"QuadSPI-memory"); "QuadSPI-memory");
if (!res) {
ret = -EINVAL;
goto err_put_ctrl;
}
q->memmap_phy = res->start; q->memmap_phy = res->start;
/* Since there are 4 cs, map size required is 4 times ahb_buf_size */ /* Since there are 4 cs, map size required is 4 times ahb_buf_size */
q->ahb_addr = devm_ioremap(dev, q->memmap_phy, q->ahb_addr = devm_ioremap(dev, q->memmap_phy,
......
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