* [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables
2016-01-26 15:26 [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables Arnd Bergmann
@ 2016-01-26 19:37 ` Tony Lindgren
2016-01-27 8:14 ` Peter Ujfalusi
2016-01-29 11:40 ` Ulf Hansson
2 siblings, 0 replies; 4+ messages in thread
From: Tony Lindgren @ 2016-01-26 19:37 UTC (permalink / raw)
To: linux-arm-kernel
* Arnd Bergmann <arnd@arndb.de> [160126 07:28]:
> When DT based probing is used but the DMA request fails, the
> driver will print uninitialized stack data from the rx_req
> and tx_req variables, as indicated by this warning:
>
> drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_probe':
> drivers/mmc/host/omap_hsmmc.c:2162:3: warning: 'rx_req' may be used uninitialized in this function [-Wmaybe-uninitialized]
> dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
>
> This removes the DMA request line number from the warning, which
> is the easiest solution and won't hurt us any more as we are
> planning to remove the legacy code path anyway.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> A simpler patch as v1 with the same result, as suggested by Peter Ujfalusi.
Looks OK to me:
Acked-by: Tony Lindgren <tony@atomide.com>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index b6639ea0bf18..87f0d840a166 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -2159,7 +2159,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &rx_req, &pdev->dev, "rx");
>
> if (!host->rx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
> @@ -2169,7 +2169,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &tx_req, &pdev->dev, "tx");
>
> if (!host->tx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
>
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables
2016-01-26 15:26 [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables Arnd Bergmann
2016-01-26 19:37 ` Tony Lindgren
@ 2016-01-27 8:14 ` Peter Ujfalusi
2016-01-29 11:40 ` Ulf Hansson
2 siblings, 0 replies; 4+ messages in thread
From: Peter Ujfalusi @ 2016-01-27 8:14 UTC (permalink / raw)
To: linux-arm-kernel
On 01/26/2016 05:26 PM, Arnd Bergmann wrote:
> When DT based probing is used but the DMA request fails, the
> driver will print uninitialized stack data from the rx_req
> and tx_req variables, as indicated by this warning:
>
> drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_probe':
> drivers/mmc/host/omap_hsmmc.c:2162:3: warning: 'rx_req' may be used uninitialized in this function [-Wmaybe-uninitialized]
> dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
>
> This removes the DMA request line number from the warning, which
> is the easiest solution and won't hurt us any more as we are
> planning to remove the legacy code path anyway.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> A simpler patch as v1 with the same result, as suggested by Peter Ujfalusi.
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index b6639ea0bf18..87f0d840a166 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -2159,7 +2159,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &rx_req, &pdev->dev, "rx");
>
> if (!host->rx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
> @@ -2169,7 +2169,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &tx_req, &pdev->dev, "tx");
>
> if (!host->tx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
>
--
P?ter
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables
2016-01-26 15:26 [PATCH v2] mmc: omap_hsmmc: don't print uninitialized variables Arnd Bergmann
2016-01-26 19:37 ` Tony Lindgren
2016-01-27 8:14 ` Peter Ujfalusi
@ 2016-01-29 11:40 ` Ulf Hansson
2 siblings, 0 replies; 4+ messages in thread
From: Ulf Hansson @ 2016-01-29 11:40 UTC (permalink / raw)
To: linux-arm-kernel
On 26 January 2016 at 16:26, Arnd Bergmann <arnd@arndb.de> wrote:
> When DT based probing is used but the DMA request fails, the
> driver will print uninitialized stack data from the rx_req
> and tx_req variables, as indicated by this warning:
>
> drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_probe':
> drivers/mmc/host/omap_hsmmc.c:2162:3: warning: 'rx_req' may be used uninitialized in this function [-Wmaybe-uninitialized]
> dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
>
> This removes the DMA request line number from the warning, which
> is the easiest solution and won't hurt us any more as we are
> planning to remove the legacy code path anyway.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Thanks, applied for next!
Kind regards
Uffe
> ---
> A simpler patch as v1 with the same result, as suggested by Peter Ujfalusi.
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index b6639ea0bf18..87f0d840a166 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -2159,7 +2159,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &rx_req, &pdev->dev, "rx");
>
> if (!host->rx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
> @@ -2169,7 +2169,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
> &tx_req, &pdev->dev, "tx");
>
> if (!host->tx_chan) {
> - dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
> + dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n");
> ret = -ENXIO;
> goto err_irq;
> }
>
^ permalink raw reply [flat|nested] 4+ messages in thread