diff options
| -rw-r--r-- | drivers/spi/spi-mem.c | 63 |
1 files changed, 42 insertions, 21 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 967f581bca4f..7916e655afc8 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -213,6 +213,44 @@ bool spi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) } EXPORT_SYMBOL_GPL(spi_mem_supports_op); +static int spi_mem_access_start(struct spi_mem *mem) +{ + struct spi_controller *ctlr = mem->spi->controller; + + /* + * Flush the message queue before executing our SPI memory + * operation to prevent preemption of regular SPI transfers. + */ + spi_flush_queue(ctlr); + + if (ctlr->auto_runtime_pm) { + int ret; + + ret = pm_runtime_get_sync(ctlr->dev.parent); + if (ret < 0) { + dev_err(&ctlr->dev, "Failed to power device: %d\n", + ret); + return ret; + } + } + + mutex_lock(&ctlr->bus_lock_mutex); + mutex_lock(&ctlr->io_mutex); + + return 0; +} + +static void spi_mem_access_end(struct spi_mem *mem) +{ + struct spi_controller *ctlr = mem->spi->controller; + + mutex_unlock(&ctlr->io_mutex); + mutex_unlock(&ctlr->bus_lock_mutex); + + if (ctlr->auto_runtime_pm) + pm_runtime_put(ctlr->dev.parent); +} + /** * spi_mem_exec_op() - Execute a memory operation * @mem: the SPI memory @@ -242,30 +280,13 @@ int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) return -ENOTSUPP; if (ctlr->mem_ops) { - /* - * Flush the message queue before executing our SPI memory - * operation to prevent preemption of regular SPI transfers. - */ - spi_flush_queue(ctlr); - - if (ctlr->auto_runtime_pm) { - ret = pm_runtime_get_sync(ctlr->dev.parent); - if (ret < 0) { - dev_err(&ctlr->dev, - "Failed to power device: %d\n", - ret); - return ret; - } - } + ret = spi_mem_access_start(mem); + if (ret) + return ret; - mutex_lock(&ctlr->bus_lock_mutex); - mutex_lock(&ctlr->io_mutex); ret = ctlr->mem_ops->exec_op(mem, op); - mutex_unlock(&ctlr->io_mutex); - mutex_unlock(&ctlr->bus_lock_mutex); - if (ctlr->auto_runtime_pm) - pm_runtime_put(ctlr->dev.parent); + spi_mem_access_end(mem); /* * Some controllers only optimize specific paths (typically the |