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-rw-r--r--drivers/spi/spi-mxs.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 21e1dcad3914..556e5ef907fa 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -177,25 +177,23 @@ static inline void mxs_spi_disable(struct mxs_spi *spi)
static int mxs_ssp_wait(struct mxs_spi *spi, int offset, int mask, bool set)
{
- unsigned long timeout = jiffies + msecs_to_jiffies(SSP_TIMEOUT);
+ const unsigned long timeout = jiffies + msecs_to_jiffies(SSP_TIMEOUT);
struct mxs_ssp *ssp = &spi->ssp;
uint32_t reg;
- while (1) {
+ do {
reg = readl_relaxed(ssp->base + offset);
- if (set && ((reg & mask) == mask))
- break;
+ if (!set)
+ reg = ~reg;
- if (!set && ((~reg & mask) == mask))
- break;
+ reg &= mask;
- udelay(1);
+ if (reg == mask)
+ return 0;
+ } while (time_before(jiffies, timeout));
- if (time_after(jiffies, timeout))
- return -ETIMEDOUT;
- }
- return 0;
+ return -ETIMEDOUT;
}
static void mxs_ssp_dma_irq_callback(void *param)