On Fri, Sep 2, 2011 at 12:35 AM, Venkatraman S <svenkatr@xxxxxx> wrote:
> Reuse omap_hsmmc_dma_cleanup even for normal dma teardown in
> omap_hsmmc_dma_cb. Consolidate multiple points of dma unmap into a
> single location in post_req function, to prevent double unmapping.
>
> Signed-off-by: Venkatraman S <svenkatr@xxxxxx>
> ---
> drivers/mmc/host/omap_hsmmc.c | 20 +++++---------------
> 1 files changed, 5 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index 21e4a79..5b7776c 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -999,7 +999,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
> {
> int dma_ch;
>
> - host->data->error = errno;
> + if (host->data)
The condition check above becomes redundant since dma_cleanup is
called during errors in omap_hsmmc_do_irq. Better have this check in
the dma_cb where dma_cleanup is newly added.
> + host->data->error = errno;
>
> spin_lock(&host->irq_lock);
> dma_ch = host->dma_ch;
> @@ -1007,12 +1008,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
> spin_unlock(&host->irq_lock);
>
> if (host->use_dma && dma_ch != -1) {
> - dma_unmap_sg(mmc_dev(host->mmc), host->data->sg,
> - host->data->sg_len,
> - omap_hsmmc_get_dma_dir(host, host->data));
> omap_free_dma(dma_ch);
> }
> - host->data = NULL;
No need to remove the above one.
> }
>
> /*
> @@ -1370,7 +1367,7 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
> {
> struct omap_hsmmc_host *host = cb_data;
> struct mmc_data *data;
> - int dma_ch, req_in_progress;
> + int req_in_progress;
>
> if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
> dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n",
> @@ -1394,16 +1391,9 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
> return;
> }
>
> - if (!data->host_cookie)
> - dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
> - omap_hsmmc_get_dma_dir(host, data));
> -
> req_in_progress = host->req_in_progress;
> - dma_ch = host->dma_ch;
> - host->dma_ch = -1;
> spin_unlock(&host->irq_lock);
> -
> - omap_free_dma(dma_ch);
> + omap_hsmmc_dma_cleanup(host, 0);
>
> /* If DMA has finished after TC, complete the request */
> if (!req_in_progress) {
> @@ -1575,7 +1565,7 @@ static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
> struct omap_hsmmc_host *host = mmc_priv(mmc);
> struct mmc_data *data = mrq->data;
>
> - if (host->use_dma) {
Here also , the above conditional check is required.
> + if (data->host_cookie) {
> dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
> omap_hsmmc_get_dma_dir(host, data));
> data->host_cookie = 0;
> --
> 1.7.1
>
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