[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <56BC40EC.60301@intel.com>
Date: Thu, 11 Feb 2016 10:06:04 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: Nicholas Krause <xerofoify@...il.com>, ulf.hansson@...aro.org
Cc: ludovic.desroches@...el.com, ivan.ivanov@...aro.org,
sbranden@...adcom.com, haibo.chen@...escale.com,
jszhang@...vell.com, marex@...x.de, linux-mmc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] mmc:host:Fix error handling for calls to the
function shdci_runtime_pm_get in the file sdhci.c
On 10/02/16 16:34, Nicholas Krause wrote:
> This fixes error handling for various function calls to
> the function shdci_runtime_pm_get in the file sdhci.c
> to check if this function call returns a error and if
> this function returns a error depending on if the caller
> function is void return either immediately a blank return
> statement or a the returned error code to the caller if the
pm_runtime_resume() returns 1 if the device's runtime PM status was already
'active', and -EACCES means that 'power.disable_depth' is different from 0
(i.e. runtime pm not enabled), so this does not look coded correctly for
those cases.
Why do you need to check the return value?
>
> Signed-off-by: Nicholas Krause <xerofoify@...il.com>
> ---
> drivers/mmc/host/sdhci.c | 31 +++++++++++++++++++++++--------
> 1 file changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 1dbe932..c31a0d6 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1342,7 +1342,8 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
>
> host = mmc_priv(mmc);
>
> - sdhci_runtime_pm_get(host);
> + if (sdhci_runtime_pm_get(host))
> + return;
>
> /* Firstly check card presence */
> present = sdhci_do_get_cd(host);
> @@ -1589,7 +1590,8 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> {
> struct sdhci_host *host = mmc_priv(mmc);
>
> - sdhci_runtime_pm_get(host);
> + if (sdhci_runtime_pm_get(host))
> + return;
> sdhci_do_set_ios(host, ios);
> sdhci_runtime_pm_put(host);
> }
> @@ -1619,7 +1621,9 @@ static int sdhci_get_cd(struct mmc_host *mmc)
> struct sdhci_host *host = mmc_priv(mmc);
> int ret;
>
> - sdhci_runtime_pm_get(host);
> + ret = sdhci_runtime_pm_get(host);
> + if (ret)
> + return ret;
> ret = sdhci_do_get_cd(host);
> sdhci_runtime_pm_put(host);
> return ret;
> @@ -1680,7 +1684,9 @@ static int sdhci_get_ro(struct mmc_host *mmc)
> struct sdhci_host *host = mmc_priv(mmc);
> int ret;
>
> - sdhci_runtime_pm_get(host);
> + ret = sdhci_runtime_pm_get(host);
> + if (ret)
> + return ret;
> ret = sdhci_do_get_ro(host);
> sdhci_runtime_pm_put(host);
> return ret;
> @@ -1705,7 +1711,8 @@ static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
> struct sdhci_host *host = mmc_priv(mmc);
> unsigned long flags;
>
> - sdhci_runtime_pm_get(host);
> + if (sdhci_runtime_pm_get(host))
> + return;
>
> spin_lock_irqsave(&host->lock, flags);
> if (enable)
> @@ -1818,7 +1825,9 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
>
> if (host->version < SDHCI_SPEC_300)
> return 0;
> - sdhci_runtime_pm_get(host);
> + err = sdhci_runtime_pm_get(host);
> + if (err)
> + return err;
> err = sdhci_do_start_signal_voltage_switch(host, ios);
> sdhci_runtime_pm_put(host);
> return err;
> @@ -1828,8 +1837,11 @@ static int sdhci_card_busy(struct mmc_host *mmc)
> {
> struct sdhci_host *host = mmc_priv(mmc);
> u32 present_state;
> + int err;
>
> - sdhci_runtime_pm_get(host);
> + err = sdhci_runtime_pm_get(host);
> + if (err)
> + return err;
> /* Check whether DAT[3:0] is 0000 */
> present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
> sdhci_runtime_pm_put(host);
> @@ -1859,7 +1871,10 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
> unsigned int tuning_count = 0;
> bool hs400_tuning;
>
> - sdhci_runtime_pm_get(host);
> + err = sdhci_runtime_pm_get(host);
> + if (err)
> + return err;
> +
> spin_lock_irqsave(&host->lock, flags);
>
> hs400_tuning = host->flags & SDHCI_HS400_TUNING;
>
Powered by blists - more mailing lists