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Subject[PATCH 0/7] driver core: prevent deferred probe with platform_driver_probe
Date
Deferred probing cannot be used with platform_driver_probe as by the
time probing is retried either the driver has been unregistered or its
probe function has been set to platform_drv_probe_fail.

With commit e9354576 ("gpiolib: Defer failed gpio requests by default")
the gpio subsystem started returning -EPROBE_DEFER, which in turn
several platform drivers using platform_driver_probe return to driver
core. Other subsystems (e.g. regulator) has since started doing the
same.

The first patch in this series prevents platform drivers using
platform_driver_probe from requesting probe deferral while warning that
it is not supported.

The remaining patches move six platform-driver probe functions that rely
on gpio_request out of __init. There are likely other probe functions
that might return -EPROBE_DEFER and should be moved out of __init as
well.

Note that the mvsdio, at91_cf and pxa25x_udc patches are completely
untested.

Johan


Johan Hovold (7):
driver core: prevent deferred probe with platform_driver_probe
mmc: mvsdio: fix deferred probe from __init
mtd: atmel_nand: fix deferred probe from __init
pcmcia: at91_cf: fix deferred probe from __init
usb: gadget: pxa25x_udc: fix deferred probe from __init
usb: phy: gpio-vbus: fix deferred probe from __init
backlight: atmel-pwm-bl: fix deferred probe from __init

drivers/base/platform.c | 17 +++++++++++++----
drivers/mmc/host/mvsdio.c | 11 ++++++-----
drivers/mtd/nand/atmel_nand.c | 13 +++++++------
drivers/pcmcia/at91_cf.c | 11 +++++------
drivers/usb/gadget/pxa25x_udc.c | 9 +++++----
drivers/usb/phy/phy-gpio-vbus-usb.c | 11 +++++------
drivers/video/backlight/atmel-pwm-bl.c | 9 +++++----
include/linux/platform_device.h | 1 +
8 files changed, 47 insertions(+), 35 deletions(-)

--
1.8.3.2



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