From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Lee Jones <lee.jones@linaro.org>,
Barry Song <Baohua.Song@csr.com>,
Stephan Gerhold <stephan@gerhold.net>,
Daniel Thompson <daniel.thompson@linaro.org>,
Mark Brown <broonie@kernel.org>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.4 18/37] mfd: mfd-core: Honour Device Tree's request to disable a child-device
Date: Wed, 11 Dec 2019 10:37:54 -0500 [thread overview]
Message-ID: <20191211153813.24126-18-sashal@kernel.org> (raw)
In-Reply-To: <20191211153813.24126-1-sashal@kernel.org>
From: Lee Jones <lee.jones@linaro.org>
[ Upstream commit 6b5c350648b857047b47acf74a57087ad27d6183 ]
Until now, MFD has assumed all child devices passed to it (via
mfd_cells) are to be registered. It does not take into account
requests from Device Tree and the like to disable child devices
on a per-platform basis.
Well now it does.
Link: https://www.spinics.net/lists/arm-kernel/msg366309.html
Link: https://lkml.org/lkml/2019/8/22/1350
Reported-by: Barry Song <Baohua.Song@csr.com>
Reported-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mfd/mfd-core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 215bb5eeb5acf..85f4e55823717 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -177,6 +177,11 @@ static int mfd_add_device(struct device *parent, int id,
if (parent->of_node && cell->of_compatible) {
for_each_child_of_node(parent->of_node, np) {
if (of_device_is_compatible(np, cell->of_compatible)) {
+ if (!of_device_is_available(np)) {
+ /* Ignore disabled devices error free */
+ ret = 0;
+ goto fail_alias;
+ }
pdev->dev.of_node = np;
pdev->dev.fwnode = &np->fwnode;
break;
--
2.20.1
next prev parent reply other threads:[~2019-12-11 15:38 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 15:37 [PATCH AUTOSEL 4.4 01/37] scsi: mpt3sas: Fix clear pending bit in ioctl status Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 02/37] scsi: lpfc: Fix locking on mailbox command completion Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 03/37] Input: atmel_mxt_ts - disable IRQ across suspend Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 04/37] iommu/tegra-smmu: Fix page tables in > 4 GiB memory Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 05/37] scsi: target: compare full CHAP_A Algorithm strings Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 06/37] scsi: lpfc: Fix SLI3 hba in loop mode not discovering devices Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 07/37] scsi: csiostor: Don't enable IRQs too early Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 08/37] powerpc/pseries: Mark accumulate_stolen_time() as notrace Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 09/37] dma-debug: add a schedule point in debug_dma_dump_mappings() Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 10/37] clocksource/drivers/asm9260: Add a check for of_clk_get Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 11/37] powerpc/security/book3s64: Report L1TF status in sysfs Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 12/37] jbd2: Fix statistics for the number of logged blocks Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 13/37] scsi: tracing: Fix handling of TRANSFER LENGTH == 0 for READ(6) and WRITE(6) Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 14/37] scsi: lpfc: Fix duplicate unreg_rpi error in port offline flow Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 15/37] clk: qcom: Allow constant ratio freq tables for rcg Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 16/37] irqchip/irq-bcm7038-l1: Enable parent IRQ if necessary Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 17/37] irqchip: ingenic: Error out if IRQ domain creation failed Sasha Levin
2019-12-11 15:37 ` Sasha Levin [this message]
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 19/37] fs/quota: handle overflows of sysctl fs.quota.* and report as unsigned long Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 20/37] scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 21/37] scsi: ufs: fix potential bug which ends in system hang Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 22/37] powerpc/pseries/cmm: Implement release() function for sysfs device Sasha Levin
2019-12-11 15:37 ` [PATCH AUTOSEL 4.4 23/37] powerpc/security: Fix wrong message when RFI Flush is disable Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 24/37] clk: pxa: fix one of the pxa RTC clocks Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 25/37] bcache: at least try to shrink 1 node in bch_mca_scan() Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 26/37] HID: Improve Windows Precision Touchpad detection Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 27/37] ext4: work around deleting a file with i_nlink == 0 safely Sasha Levin
2019-12-11 16:19 ` Theodore Y. Ts'o
2019-12-11 18:25 ` Greg KH
2019-12-11 20:04 ` Sasha Levin
2019-12-12 15:17 ` Theodore Y. Ts'o
2019-12-13 0:54 ` Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 28/37] scsi: pm80xx: Fix for SATA device discovery Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 29/37] scsi: target: iscsi: Wait for all commands to finish before freeing a session Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 30/37] gpio: mpc8xxx: Don't overwrite default irq_set_type callback Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 31/37] scripts/kallsyms: fix definitely-lost memory leak Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 32/37] cdrom: respect device capabilities during opening action Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 33/37] perf regs: Make perf_reg_name() return "unknown" instead of NULL Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 34/37] libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 35/37] s390/cpum_sf: Check for SDBT and SDB consistency Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 36/37] ocfs2: fix passing zero to 'PTR_ERR' warning Sasha Levin
2019-12-11 15:38 ` [PATCH AUTOSEL 4.4 37/37] kernel: sysctl: make drop_caches write-only Sasha Levin
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