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Fix to avoid race condition bug. #2756

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Fix to avoid race condition bug. #2756

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2 changes: 2 additions & 0 deletions drivers/spi/spi-bcm2835.c
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,8 @@ static irqreturn_t bcm2835_spi_interrupt(int irq, void *dev_id)

/* based on flags decide if we can finish the transfer */
if (bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_DONE) {
/* Ensure the RX FIFO is completely drained */
bcm2835_rd_fifo(bs);
/* Transfer complete - reset SPI HW */
bcm2835_spi_reset_hw(master);
/* wake up the framework */
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