From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Epler Subject: [RFC 3/4] spidev: actually use synchronous transfers Date: Sun, 14 Sep 2014 09:45:07 -0500 Message-ID: <1410705908-20847-4-git-send-email-jepler@unpythonic.net> References: <1410705908-20847-1-git-send-email-jepler@unpythonic.net> To: linux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: In-Reply-To: <1410705908-20847-1-git-send-email-jepler-ixP+gI44yfQ4d9/VWYMlNA@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: this reduces a source of latency --- drivers/spi/spidev.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index dda7632..6e37c59 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -120,15 +120,9 @@ spidev_sync(struct spidev_data *spidev, struct spi_message *message) if (spidev->spi == NULL) status = -ESHUTDOWN; else - status = spi_async(spidev->spi, message); + status = spi_sync(spidev->spi, message); spin_unlock_irq(&spidev->spi_lock); - if (status == 0) { - wait_for_completion(&done); - status = message->status; - if (status == 0) - status = message->actual_length; - } return status; } -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html