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Date: Wed, 27 Jan 2016 12:31:47 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Adrian Hunter <adrian.hunter@...el.com>, Ulf Hansson <ulf.hansson@...aro.org>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 4.2.y-ckt 046/268] mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT 4.2.8-ckt3 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Adrian Hunter <adrian.hunter@...el.com> commit 1ca896856281d3f1ad4f6f7d4e32e2943452de23 upstream. In some cases, the stronger 33 Ohm driver strength must not be used so it is not a suitable default. Change it to the standard default 50 Ohm value. The patch applies to v4.2+ except the file name changed. It is drivers/mmc/host/sdhci-pci.c prior to v.4.4. Signed-off-by: Adrian Hunter <adrian.hunter@...el.com> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/mmc/host/sdhci-pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index b3b0a3e..5d2e222 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -277,7 +277,7 @@ static int spt_select_drive_strength(struct sdhci_host *host, if (sdhci_pci_spt_drive_strength > 0) drive_strength = sdhci_pci_spt_drive_strength & 0xf; else - drive_strength = 1; /* 33-ohm */ + drive_strength = 0; /* Default 50-ohm */ if ((mmc_driver_type_mask(drive_strength) & card_drv) == 0) drive_strength = 0; /* Default 50-ohm */ -- 1.9.1
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