This is a note to let you know that I've just added the patch titled misc: rtsx: do not setting OC_POWER_DOWN reg in rtsx_pci_init_ocp() to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: misc-rtsx-do-not-setting-oc_power_down-reg-in-rtsx_pci_init_ocp.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 551b6729578a8981c46af964c10bf7d5d9ddca83 Mon Sep 17 00:00:00 2001 From: Ricky Wu <ricky_wu@xxxxxxxxxxx> Date: Mon, 24 Aug 2020 11:00:06 +0800 Subject: misc: rtsx: do not setting OC_POWER_DOWN reg in rtsx_pci_init_ocp() From: Ricky Wu <ricky_wu@xxxxxxxxxxx> commit 551b6729578a8981c46af964c10bf7d5d9ddca83 upstream. this power saving action in rtsx_pci_init_ocp() cause INTEL-NUC6 platform missing card reader Signed-off-by: Ricky Wu <ricky_wu@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20200824030006.30033-1-ricky_wu@xxxxxxxxxxx Cc: Chris Clayton <chris2553@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/misc/cardreader/rtsx_pcr.c | 4 ---- 1 file changed, 4 deletions(-) --- a/drivers/misc/cardreader/rtsx_pcr.c +++ b/drivers/misc/cardreader/rtsx_pcr.c @@ -1189,10 +1189,6 @@ void rtsx_pci_init_ocp(struct rtsx_pcr * rtsx_pci_write_register(pcr, REG_OCPGLITCH, SD_OCP_GLITCH_MASK, pcr->hw_param.ocp_glitch); rtsx_pci_enable_ocp(pcr); - } else { - /* OC power down */ - rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN, - OC_POWER_DOWN); } } } Patches currently in stable-queue which might be from ricky_wu@xxxxxxxxxxx are queue-5.4/misc-rtsx-do-not-setting-oc_power_down-reg-in-rtsx_pci_init_ocp.patch