Since the new spi_controller_xfer_timeout() helper appeared, we may replace open coded variant in spi_transfer_wait().
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- drivers/spi/spi.c | 25 ++----------------------- include/linux/spi/spi.h | 6 +++++- 2 files changed, 7 insertions(+), 24 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 125dea8fae00..c99ee4164f11 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1342,8 +1342,7 @@ static int spi_transfer_wait(struct spi_controller *ctlr, { struct spi_statistics __percpu *statm = ctlr->pcpu_statistics; struct spi_statistics __percpu *stats = msg->spi->pcpu_statistics; - u32 speed_hz = xfer->speed_hz; - unsigned long long ms; + unsigned long ms;
if (spi_controller_is_slave(ctlr)) { if (wait_for_completion_interruptible(&ctlr->xfer_completion)) { @@ -1351,29 +1350,9 @@ static int spi_transfer_wait(struct spi_controller *ctlr, return -EINTR; } } else { - if (!speed_hz) - speed_hz = 100000; - - /* - * For each byte we wait for 8 cycles of the SPI clock. - * Since speed is defined in Hz and we want milliseconds, - * use respective multiplier, but before the division, - * otherwise we may get 0 for short transfers. - */ - ms = 8LL * MSEC_PER_SEC * xfer->len; - do_div(ms, speed_hz); - - /* - * Increase it twice and add 200 ms tolerance, use - * predefined maximum in case of overflow. - */ - ms += ms + 200; - if (ms > UINT_MAX) - ms = UINT_MAX; - + ms = spi_controller_xfer_timeout(ctlr, xfer); ms = wait_for_completion_timeout(&ctlr->xfer_completion, msecs_to_jiffies(ms)); - if (ms == 0) { SPI_STATISTICS_INCREMENT_FIELD(statm, timedout); SPI_STATISTICS_INCREMENT_FIELD(stats, timedout); diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 32c94eae8926..0ce1cb18a076 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -1270,12 +1270,16 @@ static inline bool spi_is_bpw_supported(struct spi_device *spi, u32 bpw) * that it would take on a single data line and take twice this amount of time * with a minimum of 500ms to avoid false positives on loaded systems. * + * Assume speed to be 100 kHz if it's not defined at the time of invocation. + * * Returns: Transfer timeout value in milliseconds. */ static inline unsigned int spi_controller_xfer_timeout(struct spi_controller *ctlr, struct spi_transfer *xfer) { - return max(xfer->len * 8 * 2 / (xfer->speed_hz / 1000), 500U); + u32 speed_hz = xfer->speed_hz ?: 100000; + + return max(xfer->len * 8 * 2 / (speed_hz / 1000), 500U); }
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