From: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
To: Bryan Wu <cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mike Frysinger
<vapier.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 05/16] Blackfin SPI Driver: pass DMA overflow error to the higher level
Date: Thu, 20 Nov 2008 12:29:10 -0800 [thread overview]
Message-ID: <200811201229.10924.david-b@pacbell.net> (raw)
In-Reply-To: <1226994760-4301-6-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
On Monday 17 November 2008, Bryan Wu wrote:
> From: Mike Frysinger <vapier.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
> If the SPI bus registers a receive overflow error,
> pass the result back up to the higher levels.
>
> Signed-off-by: Mike Frysinger <vapier.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Bryan Wu <cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Acked-by: David Brownell <dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
> ---
> drivers/spi/spi_bfin5xx.c | 16 +++++++++++-----
> 1 files changed, 11 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
> index cc415e8..642c402 100644
> --- a/drivers/spi/spi_bfin5xx.c
> +++ b/drivers/spi/spi_bfin5xx.c
> @@ -559,6 +559,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
> struct driver_data *drv_data = dev_id;
> struct chip_data *chip = drv_data->cur_chip;
> struct spi_message *msg = drv_data->cur_msg;
> + u16 spistat = read_STAT(drv_data);
>
> dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n");
> clear_dma_irqstat(drv_data->dma_channel);
> @@ -582,13 +583,18 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
> while (!(read_STAT(drv_data) & SPIF))
> cpu_relax();
>
> - msg->actual_length += drv_data->len_in_bytes;
> + if (spistat & RBSY) {
> + msg->state = ERROR_STATE;
> + dev_err(&drv_data->pdev->dev, "dma receive: fifo/buffer overflow\n");
> + } else {
> + msg->actual_length += drv_data->len_in_bytes;
>
> - if (drv_data->cs_change)
> - cs_deactive(drv_data, chip);
> + if (drv_data->cs_change)
> + cs_deactive(drv_data, chip);
>
> - /* Move to next transfer */
> - msg->state = next_transfer(drv_data);
> + /* Move to next transfer */
> + msg->state = next_transfer(drv_data);
> + }
>
> /* Schedule transfer tasklet */
> tasklet_schedule(&drv_data->pump_transfers);
> --
> 1.5.6.3
>
>
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next prev parent reply other threads:[~2008-11-20 20:29 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-18 7:52 (no subject) Bryan Wu
[not found] ` <1226994760-4301-1-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-18 7:52 ` [PATCH 01/16] Blackfin SPI Driver: ensure cache coherency before doing DMA Bryan Wu
[not found] ` <1226994760-4301-2-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:24 ` David Brownell
[not found] ` <200811201224.15493.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-20 20:58 ` Mike Frysinger
[not found] ` <8bd0f97a0811201258j14dfcf46vce1655632bb12e2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-11-20 21:47 ` David Brownell
[not found] ` <200811201347.46355.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-20 21:57 ` Mike Frysinger
[not found] ` <8bd0f97a0811201357g1ffeb7d3pfad6e178fb20050e-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-11-20 22:05 ` David Brownell
[not found] ` <200811201405.06811.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2009-02-05 9:30 ` Bryan Wu
2009-02-05 23:51 ` David Brownell
[not found] ` <200902051551.14146.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2009-02-06 2:31 ` Bryan Wu
2008-11-18 7:52 ` [PATCH 02/16] Blackfin SPI Driver: Fix erroneous SPI Clock divisor calculation Bryan Wu
[not found] ` <1226994760-4301-3-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:25 ` David Brownell
2008-11-18 7:52 ` [PATCH 03/16] Blackfin SPI Driver: move bfin_addr_dcachable() and friends into the cacheflush header where it belongs Bryan Wu
[not found] ` <1226994760-4301-4-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:26 ` David Brownell
2008-11-18 7:52 ` [PATCH 04/16] Blackfin SPI Driver: use len_in_bytes when we care about the number of bytes transferred Bryan Wu
[not found] ` <1226994760-4301-5-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:25 ` David Brownell
2008-11-18 7:52 ` [PATCH 05/16] Blackfin SPI Driver: pass DMA overflow error to the higher level Bryan Wu
[not found] ` <1226994760-4301-6-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:29 ` David Brownell [this message]
2008-11-18 7:52 ` [PATCH 06/16] Blackfin SPI Driver: unify duplicated code in dma read/write paths Bryan Wu
[not found] ` <1226994760-4301-7-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:32 ` David Brownell
2008-11-18 7:52 ` [PATCH 07/16] Blackfin SPI Driver: drop bogus cast and touchup dma label Bryan Wu
[not found] ` <1226994760-4301-8-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:34 ` David Brownell
2008-11-18 7:52 ` [PATCH 08/16] Blackfin SPI Driver: add a few more debug messages in useful places Bryan Wu
[not found] ` <1226994760-4301-9-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:35 ` David Brownell
2008-11-18 7:52 ` [PATCH 09/16] Blackfin SPI Driver: do not check for SPI errors if DMA itself did not flag any Bryan Wu
2008-11-18 7:52 ` [PATCH 10/16] Blackfin SPI Driver: use the properl BIT_CTL_xxx defines Bryan Wu
[not found] ` <1226994760-4301-11-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:37 ` David Brownell
2008-11-18 7:52 ` [PATCH 11/16] Blackfin SPI Driver: remove duplicated MAX_SPI_SSEL and remove unnecessary array size Bryan Wu
2008-11-18 7:52 ` [PATCH 12/16] Blackfin SPI Driver: get dma working for SPI flashes Bryan Wu
[not found] ` <1226994760-4301-13-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:43 ` David Brownell
2008-11-18 7:52 ` [PATCH 13/16] Blackfin SPI Driver: add timeout while waiting for SPIF in dma irq handler Bryan Wu
2008-11-18 7:52 ` [PATCH 14/16] Blackfin SPI Driver: tweak magic spi dma sequence to get it working on BF54x Bryan Wu
2008-11-18 7:52 ` [PATCH 15/16] Blackfin SPI Driver: fix bug - spi controller driver does not assert/deassert CS correctly Bryan Wu
[not found] ` <1226994760-4301-16-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:47 ` David Brownell
2008-11-18 7:52 ` [PATCH 16/16] Blackfin SPI Driver: fix bug - correct usage of struct spi_transfer.cs_change Bryan Wu
[not found] ` <1226994760-4301-17-git-send-email-cooloney-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2008-11-20 20:51 ` David Brownell
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