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linux/drivers/mmc/core
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Adrian Hunter f9f0da9881 mmc: block: Ensure that debugfs files are removed 
The card is not necessarily being removed, but the debugfs files must be
removed when the driver is removed, otherwise they will continue to exist
after unbinding the card from the driver. e.g.

  # echo "mmc1:0001" > /sys/bus/mmc/drivers/mmcblk/unbind
  # cat /sys/kernel/debug/mmc1/mmc1\:0001/ext_csd
  [  173.634584] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
  [  173.643356] IP: mmc_ext_csd_open+0x5e/0x170

A complication is that the debugfs_root may have already been removed, so
check for that too.

Fixes: 627c3ccfb4 ("mmc: debugfs: Move block debugfs into block module")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-11-23 14:39:13 +01:00
..
block.c mmc: block: Ensure that debugfs files are removed 2017-11-23 14:39:13 +01:00
block.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bus.c mmc: core: Do not leave the block driver in a suspended state 2017-11-23 14:09:21 +01:00
bus.h mmc: core: Move public functions from card.h to private headers 2017-02-13 13:20:24 +01:00
card.h mmc: core: change quirks.c to be a header file 2017-02-15 11:34:26 +01:00
core.c mmc: add kerneldoc to mmc_regulator_get_supply() 2017-10-30 11:50:32 +01:00
core.h mmc: core: Factor out mmc_host_set_uhs_voltage() 2017-10-30 11:45:57 +01:00
debugfs.c mmc: block: Ensure that debugfs files are removed 2017-11-23 14:39:13 +01:00
host.c mmc: parse new binding for eMMC fixed driver type 2017-10-30 11:50:38 +01:00
host.h mmc: core: Export a few functions needed for blkmq support 2017-10-30 11:45:56 +01:00
Kconfig mmc: core: Delete bounce buffer Kconfig option 2017-06-20 10:30:17 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmc_ops.c mmc: core: Export a few functions needed for blkmq support 2017-10-30 11:45:56 +01:00
mmc_ops.h mmc: core: Re-factor code for sending CID 2017-06-20 10:30:45 +02:00
mmc_test.c mmc: test: reduce stack usage in mmc_test_nonblock_transfer 2017-08-30 15:03:37 +02:00
mmc.c mmc: parse new binding for eMMC fixed driver type 2017-10-30 11:50:38 +01:00
pwrseq_emmc.c mmc: core: Don't do eMMC HW reset when resuming the eMMC card 2017-06-20 10:30:10 +02:00
pwrseq_sd8787.c mmc: pwrseq: add support for Marvell SD8787 chip 2017-02-13 13:20:33 +01:00
pwrseq_simple.c mmc: pwrseq_simple: Parse DTS for the power-off-delay-us property 2017-05-23 14:17:36 +02:00
pwrseq.c mmc: pwrseq: Add reset callback to the struct mmc_pwrseq_ops 2017-06-20 10:30:09 +02:00
pwrseq.h mmc: pwrseq: Add reset callback to the struct mmc_pwrseq_ops 2017-06-20 10:30:09 +02:00
queue.c mmc: block: Factor out mmc_setup_queue() 2017-10-30 11:45:52 +01:00
queue.h MMC core: 2017-11-13 10:17:35 -08:00
quirks.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sd_ops.c mmc: core: add proper be32 annotation 2017-04-24 21:42:19 +02:00
sd_ops.h mmc: core: add proper be32 annotation 2017-04-24 21:42:19 +02:00
sd.c mmc: sd: Fix signal voltage when there is no power cycle 2017-10-30 11:45:57 +01:00
sd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sdio_bus.c mmc: sdio: fix alignment issue in struct sdio_func 2017-04-18 19:18:07 +02:00
sdio_bus.h mmc: core: First step in cleaning up private mmc header files 2017-02-13 13:20:20 +01:00
sdio_cis.c mmc: core: remove BUG_ONs from sdio 2016-12-05 10:31:08 +01:00
sdio_cis.h mmc: core: First step in cleaning up private mmc header files 2017-02-13 13:20:20 +01:00
sdio_io.c mmc: core: simplify return code 2017-04-24 21:41:24 +02:00
sdio_irq.c mmc: core: Introduce host claiming by context 2017-10-30 11:45:49 +01:00
sdio_ops.c mmc: sdio: improve mmc_io_rw_extended 2017-04-24 21:41:42 +02:00
sdio_ops.h mmc: sdio: Add API to manage SDIO IRQs from a workqueue 2017-06-20 10:30:11 +02:00
sdio_uart.c mmc: block: Move files to core 2016-12-12 16:30:05 +01:00
sdio.c mmc: sdio: Keep card runtime resumed while adding function devices 2017-06-20 10:30:39 +02:00
slot-gpio.c mmc: slot-gpio: Add support to enable irq wake on cd_irq 2017-06-20 10:30:49 +02:00
slot-gpio.h mmc: core: First step in cleaning up private mmc header files 2017-02-13 13:20:20 +01:00