From: Pan Bian Date: Wed, 6 Nov 2019 02:36:09 +0000 (+0800) Subject: spi: img-spfi: fix potential double release X-Git-Tag: v5.4.7~198 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cc492872180a5c58ac4166ca650d80468db97ba3;p=platform%2Fkernel%2Flinux-rpi.git spi: img-spfi: fix potential double release [ Upstream commit e9a8ba9769a0e354341bc6cc01b98aadcea1dfe9 ] The channels spfi->tx_ch and spfi->rx_ch are not set to NULL after they are released. As a result, they will be released again, either on the error handling branch in the same function or in the corresponding remove function, i.e. img_spfi_remove(). This patch fixes the bug by setting the two members to NULL. Signed-off-by: Pan Bian Link: https://lore.kernel.org/r/1573007769-20131-1-git-send-email-bianpan2016@163.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index 439b01e..f4a8f47 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -673,6 +673,8 @@ static int img_spfi_probe(struct platform_device *pdev) dma_release_channel(spfi->tx_ch); if (spfi->rx_ch) dma_release_channel(spfi->rx_ch); + spfi->tx_ch = NULL; + spfi->rx_ch = NULL; dev_warn(spfi->dev, "Failed to get DMA channels, falling back to PIO mode\n"); } else { master->dma_tx = spfi->tx_ch;