Andreas Kemnade
c18eee29f0
commitec76c2eea9upstream. On the GTA04A5 od->_driver_status was not set to BUS_NOTIFY_BIND_DRIVER during probe of the second mmc used for wifi. Therefore omap_device_late_idle idled the device during probing causing oopses when accessing the registers. It was not set because od->_state was set to OMAP_DEVICE_STATE_IDLE in the notifier callback. Therefore set od->_driver_status also in that case. This came apparent after commit21b2cec61c("mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v4.4") causing this oops: omap_hsmmc 480b4000.mmc: omap_device_late_idle: enabled but no driver. Idling 8<--- cut here --- Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa0b402c ... (omap_hsmmc_set_bus_width) from [<c07996bc>] (omap_hsmmc_set_ios+0x11c/0x258) (omap_hsmmc_set_ios) from [<c077b2b0>] (mmc_power_up.part.8+0x3c/0xd0) (mmc_power_up.part.8) from [<c077c14c>] (mmc_start_host+0x88/0x9c) (mmc_start_host) from [<c077d284>] (mmc_add_host+0x58/0x84) (mmc_add_host) from [<c0799190>] (omap_hsmmc_probe+0x5fc/0x8c0) (omap_hsmmc_probe) from [<c0666728>] (platform_drv_probe+0x48/0x98) (platform_drv_probe) from [<c066457c>] (really_probe+0x1dc/0x3b4) Fixes:04abaf07f6("ARM: OMAP2+: omap_device: Sync omap_device and pm_runtime after probe defer") Fixes:21b2cec61c("mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v4.4") Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Andreas Kemnade <andreas@kemnade.info> [tony@atomide.com: left out extra parens, trimmed description stack trace] Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.