This is a note to let you know that I've just added the patch titled
mmc: bcm2835: Don't overwrite max frequency unconditionally
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: mmc-bcm2835-don-t-overwrite-max-frequency-unconditionally.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 118032be389009b07ecb5a03ffe219a89d421def Mon Sep 17 00:00:00 2001
From: Phil Elwell phil@raspberrypi.org Date: Mon, 12 Feb 2018 21:13:44 +0100 Subject: mmc: bcm2835: Don't overwrite max frequency unconditionally
From: Phil Elwell phil@raspberrypi.org
commit 118032be389009b07ecb5a03ffe219a89d421def upstream.
The optional DT parameter max-frequency could init the max bus frequency. So take care of this, before setting the max bus frequency.
Fixes: 660fc733bd74 ("mmc: bcm2835: Add new driver for the sdhost controller.") Signed-off-by: Phil Elwell phil@raspberrypi.org Signed-off-by: Stefan Wahren stefan.wahren@i2se.com Cc: stable@vger.kernel.org # 4.12+ Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/bcm2835.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -1265,7 +1265,8 @@ static int bcm2835_add_host(struct bcm28 char pio_limit_string[20]; int ret;
- mmc->f_max = host->max_clk; + if (!mmc->f_max || mmc->f_max > host->max_clk) + mmc->f_max = host->max_clk; mmc->f_min = host->max_clk / SDCDIV_MAX_CDIV;
mmc->max_busy_timeout = ~0 / (mmc->f_max / 1000);
Patches currently in stable-queue which might be from phil@raspberrypi.org are
queue-4.15/mmc-bcm2835-don-t-overwrite-max-frequency-unconditionally.patch