Orson Zhai cadbba5ec8 mailbox: sprd: Introduce refcnt when clients requests/free channels ...

[ Upstream commit 9468ab84032f96496e998cfa173cd1d0ac316bcd ]

Unisoc mailbox has no way to be enabled/disabled for any single channel.
They can only be set to startup or shutdown as a whole device at same time.

Add a variable to count references to avoid mailbox FIFO being reset
unexpectedly when clients are requesting or freeing channels.

Also add a lock to dismiss possible conflicts from register r/w in
different startup or shutdown threads. And fix the crash problem when early
interrupts come from channel which has not been requested by client yet.

Fixes: ca27fc26cd22 ("mailbox: sprd: Add Spreadtrum mailbox driver")
Signed-off-by: Orson Zhai <orson.zhai@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-05-14 09:50:27 +02:00

..

arm_mhu_db.c

mailbox: arm_mhu_db: Fix mhu_db_shutdown by replacing kfree with devm_kfree

2020-12-30 11:53:28 +01:00

arm_mhu.c

mailbox: arm_mhu: Match only if compatible is "arm,mhu"

2020-10-12 21:10:34 -05:00

armada-37xx-rwtm-mailbox.c

mailbox:armada-37xx-rwtm:remove duplicate print in armada_37xx_mbox_probe()

2020-03-19 23:00:32 -05:00

bcm2835-mailbox.c

mailbox: bcm2835: Use device-managed registration API

2018-12-21 16:49:25 -06:00

bcm-flexrm-mailbox.c

maillbox: bcm-flexrm-mailbox: handle cmpl_pool dma allocation failure

2020-03-19 23:00:32 -05:00

bcm-pdc-mailbox.c

mailbox: bcm: convert tasklets to use new tasklet_setup() API

2020-10-12 21:10:34 -05:00

hi3660-mailbox.c

mailbox: hi3660: Use device-managed registration API

2018-12-21 16:49:25 -06:00

hi6220-mailbox.c

mailbox: no need to set .owner platform_driver_register

2019-11-26 22:45:15 -06:00

imx-mailbox.c

mailbox: imx: Mark PM functions as __maybe_unused

2020-08-03 23:28:36 -05:00

Kconfig

mailbox: Add support for Qualcomm IPCC

2020-05-30 18:43:23 -05:00

mailbox-altera.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201

2019-05-30 11:29:52 -07:00

mailbox-sti.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

mailbox-test.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

mailbox-xgene-slimpro.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13

2019-05-21 11:28:45 +02:00

mailbox.c

mailbox: avoid timer start from callback

2020-10-16 19:09:17 -05:00

mailbox.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

Makefile

mailbox: arm_mhu: Add ARM MHU doorbell driver

2020-10-12 21:10:34 -05:00

mtk-cmdq-mailbox.c

maiblox: mediatek: Fix handling of platform_get_irq() error

2020-10-12 21:10:34 -05:00

omap-mailbox.c

mailbox: Replace HTTP links with HTTPS ones

2020-08-03 23:24:43 -05:00

pcc.c

mailbox: pcc: Put the PCCT table for error path

2020-08-03 23:25:19 -05:00

pl320-ipc.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201

2019-05-30 11:29:52 -07:00

platform_mhu.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285

2019-06-05 17:36:37 +02:00

qcom-apcs-ipc-mailbox.c

mailbox: qcom: Add msm8994 apcs compatible

2020-08-03 23:31:34 -05:00

qcom-ipcc.c

mailbox: Add support for Qualcomm IPCC

2020-05-30 18:43:23 -05:00

rockchip-mailbox.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288

2019-06-05 17:36:37 +02:00

sprd-mailbox.c

mailbox: sprd: Introduce refcnt when clients requests/free channels

2021-05-14 09:50:27 +02:00

stm32-ipcc.c

mailbox: stm32-ipcc: Update wakeup management

2019-11-30 23:08:59 -06:00

sun6i-msgbox.c

mailbox: sun6i-msgbox: Add a new mailbox driver

2020-03-19 23:00:32 -05:00

tegra-hsp.c

firmware: tegra: Enable BPMP support on Tegra234

2020-09-18 15:57:04 +02:00

ti-msgmgr.c

mailbox: Replace HTTP links with HTTPS ones

2020-08-03 23:24:43 -05:00

zynqmp-ipi-mailbox.c

mailbox: zynqmp-ipi: Fix NULL vs IS_ERR() check in zynqmp_ipi_mbox_probe()

2020-05-30 18:08:40 -05:00