From: Greg KH <gregkh@linuxfoundation.org>
To: "Bao D. Nguyen" <nguyenb@codeaurora.org>
Cc: ulf.hansson@linaro.org, robh+dt@kernel.org,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
asutoshd@codeaurora.org, cang@codeaurora.org,
Sujith Reddy Thumma <sthumma@codeaurora.org>,
Subhash Jadavani <subhashj@codeaurora.org>,
Xiaonian Wang <xiaonian@codeaurora.org>
Subject: Re: [<PATCH v1> 7/9] mmc: core: Skip frequency retries for SDCC slots
Date: Wed, 18 Dec 2019 09:34:48 +0100 [thread overview]
Message-ID: <20191218083448.GE1554871@kroah.com> (raw)
In-Reply-To: <68b936a67e67cd25597915cbd76b73ed046d1ce4.1576540908.git.nguyenb@codeaurora.org>
On Mon, Dec 16, 2019 at 06:50:40PM -0800, Bao D. Nguyen wrote:
> From: Sujith Reddy Thumma <sthumma@codeaurora.org>
>
> Qualcomm SDCC controller supports minimum SD clock frequency
> which is required for card initialization. This information is
> exported through platform data for each SDCC controller. There is
> no need of retrying higher frequencies than the minimum supported
> by controller for Qualcomm chipsets which inturn add delay in
> detection process if there is no card during suspend/resume cycles.
> Hence, skip multiple frequency retries.
>
> Signed-off-by: Sujith Reddy Thumma <sthumma@codeaurora.org>
> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
> Signed-off-by: Xiaonian Wang <xiaonian@codeaurora.org>
> Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
> ---
> drivers/mmc/core/core.c | 9 +--------
> 1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 1e37f78..38b0cec 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -2281,7 +2281,6 @@ void mmc_rescan(struct work_struct *work)
> {
> struct mmc_host *host =
> container_of(work, struct mmc_host, detect.work);
> - int i;
>
> if (host->rescan_disable)
> return;
> @@ -2332,13 +2331,7 @@ void mmc_rescan(struct work_struct *work)
> mmc_release_host(host);
> goto out;
> }
> -
> - for (i = 0; i < ARRAY_SIZE(freqs); i++) {
> - if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
> - break;
> - if (freqs[i] <= host->f_min)
> - break;
> - }
> + mmc_rescan_try_freq(host, host->f_min);
What about for non-qualcomm controllers? Did this just break their
functionality?
thanks,
greg k-h
next prev parent reply other threads:[~2019-12-18 8:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 2:50 [<PATCH v1> 0/9] SD card bug fixes Bao D. Nguyen
2019-12-17 2:50 ` [<PATCH v1> 1/9] mmc: core: Add a cap to use long discard size Bao D. Nguyen
2019-12-17 7:09 ` Ulf Hansson
2019-12-17 2:50 ` [<PATCH v1> 2/9] mmc: core: allow hosts to specify a large " Bao D. Nguyen
2019-12-17 2:50 ` [<PATCH v1> 3/9] mmc: host: Add device_prepare pm for mmc_host Bao D. Nguyen
2019-12-17 2:50 ` [<PATCH v1> 4/9] mmc: core: fix SD card request queue refcount underflow during shutdown Bao D. Nguyen
2019-12-18 8:33 ` Greg KH
2019-12-17 2:50 ` [<PATCH v1> 5/9] mmc: core: fix one NULL pointer dereference after SD card is removed Bao D. Nguyen
2019-12-17 2:50 ` [<PATCH v1> 6/9] mmc: sdhci-msm: Ignore data timeout error for R1B commands Bao D. Nguyen
2019-12-18 8:34 ` Greg KH
2019-12-17 2:50 ` [<PATCH v1> 7/9] mmc: core: Skip frequency retries for SDCC slots Bao D. Nguyen
2019-12-18 8:34 ` Greg KH [this message]
2019-12-18 11:48 ` Ulf Hansson
2019-12-18 12:04 ` Greg Kroah-Hartman
2019-12-18 13:12 ` Ulf Hansson
2019-12-17 2:50 ` [<PATCH v1> 8/9] mmc: core: remove shutdown handler Bao D. Nguyen
2019-12-17 2:50 ` [<PATCH v1> 9/9] mmc: sd: Fix trivial SD card issues Bao D. Nguyen
2019-12-18 8:29 ` Greg KH
2019-12-18 20:16 ` nguyenb
2019-12-18 8:21 ` [<PATCH v1> 0/9] SD card bug fixes Greg KH
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