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| author | Benjamin Gaignard <benjamin.gaignard@collabora.com> | 2022-01-31 17:17:08 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-08 20:34:08 +0300 |
| commit | 7352f2c264824acd589d7cbbf9348e6870d4ddea (patch) | |
| tree | 29ee55d587e0a700e69e9780c0eff52c407b8f42 | |
| parent | 101a1cf8af552d2b0686d9d751b22e5c1377a4b2 (diff) | |
| download | linux-7352f2c264824acd589d7cbbf9348e6870d4ddea.tar.xz | |
spi: mediatek: Avoid NULL pointer crash in interrupt
commit f83a96e5f033fbbd21764705cb9c04234b96218e upstream.
In some case, like after a transfer timeout, master->cur_msg pointer
is NULL which led to a kernel crash when trying to use master->cur_msg->spi.
mtk_spi_can_dma(), pointed by master->can_dma, doesn't use this parameter
avoid the problem by setting NULL as second parameter.
Fixes: a568231f46322 ("spi: mediatek: Add spi bus for Mediatek MT8173")
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Link: https://lore.kernel.org/r/20220131141708.888710-1-benjamin.gaignard@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi-mt65xx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index a15de10ee286..753bd313e6fd 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -624,7 +624,7 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) else mdata->state = MTK_SPI_IDLE; - if (!master->can_dma(master, master->cur_msg->spi, trans)) { + if (!master->can_dma(master, NULL, trans)) { if (trans->rx_buf) { cnt = mdata->xfer_len / 4; ioread32_rep(mdata->base + SPI_RX_DATA_REG, |