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* Revert "firmware: add sanity check on shutdown/suspend"Linus Torvalds2017-09-101-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 81f95076281fdd3bc382e004ba1bce8e82fccbce. It causes random failures of firmware loading at resume time (well, random for me, it seems to be more reliable for others) because the firmware disabling is not actually synchronous with any particular resume event, and at least the btusb driver that uses a workqueue to load the firmware at resume seems to occasionally hit the "firmware loading is disabled" logic because the firmware loader hasn't gotten the resume event yet. Some kind of sanity check for not trying to load firmware when it's not possible might be a good thing, but this commit was not it. Greg seems to have silently suffered the same issue, and pointed to the likely culprit, and Gabriel C verified the revert fixed it for him too. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Pointed-at-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tested-by: Gabriel C <nix.or.die@gmail.com> Cc: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* firmware: add sanity check on shutdown/suspendLuis R. Rodriguez2017-06-031-0/+11
| | | | | | | | | | | | | The firmware API should not be used after we go to suspend and after we reboot/halt. The suspend/resume case is a bit complex, so this documents that so things are clearer. We want to know about users of the API in incorrect places so that their callers are corrected, so this also adds a warn for those cases. Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* docs-rst: core_api: move driver-specific stuff to drivers_apiMauro Carvalho Chehab2017-04-022-0/+16
| | | | | | | | | There are several stuff there that are actually driver-specific. Move those to the driver_api book. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* firmware: revamp firmware documentationLuis R. Rodriguez2017-01-1110-0/+473
Understanding this code is getting out of control without any notes. Give the firmware_class driver a much needed documentation love, and while at it convert it to the new sphinx documentation format. v2: typos and small fixes Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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