On 29 April 2014 10:32, Alex Smith <alex.sm...@imgtec.com> wrote:
> As of commit bcc3e1726d ("mmc: block: Use R1 responses for stop cmds for
> read requests"), stop commands for reads do not have MMC_RSP_BUSY set.
> In this case we should not wait for a PRG_DONE IRQ after sending the
> stop command: it will not get raised when the busy flag is not set,
> causing the request to fail with a timeout.
>
> Signed-off-by: Alex Smith <alex.sm...@imgtec.com>
> Cc: Lars-Peter Clausen <l...@metafoo.de>
> Cc: Ulf Hansson <ulf.hans...@linaro.org>
> Cc: Chris Ball <ch...@printf.net>
> Cc: James Hogan <james.ho...@imgtec.com>
Acked-by: Ulf Hansson <ulf.hans...@linaro.org>
> ---
> drivers/mmc/host/jz4740_mmc.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
> index de2139c..1c3368b 100644
> --- a/drivers/mmc/host/jz4740_mmc.c
> +++ b/drivers/mmc/host/jz4740_mmc.c
> @@ -515,10 +515,12 @@ static irqreturn_t jz_mmc_irq_worker(int irq, void
> *devid)
>
> jz4740_mmc_send_command(host, req->stop);
>
> - timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_PRG_DONE);
> - if (timeout) {
> - host->state = JZ4740_MMC_STATE_DONE;
> - break;
> + if (mmc_resp_type(req->stop) & MMC_RSP_BUSY) {
> + timeout = jz4740_mmc_poll_irq(host,
> JZ_MMC_IRQ_PRG_DONE);
> + if (timeout) {
> + host->state = JZ4740_MMC_STATE_DONE;
> + break;
> + }
> }
> case JZ4740_MMC_STATE_DONE:
> break;
> --
> 1.9.2
>
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