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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-17 08:18:08 +1300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-17 08:18:08 +1300 |
| commit | 7ad4b4ae5757b89637f5767ae5d9e1436a6413e0 (patch) | |
| tree | 7a025400de12c813b395efcba459ac4088679ec5 /drivers/misc | |
| parent | 62b1530065e9ced536ada063a4d0a748efa43cc8 (diff) | |
| parent | 7b7c54914f73966976893747ee8e2ca58166a627 (diff) | |
| download | linux-7ad4b4ae5757b89637f5767ae5d9e1436a6413e0.tar.bz2 | |
Merge tag 'char-misc-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are three small driver fixes for reported issues for 3.19-rc5.
All of these have been in linux-next for a while with no reported
problems"
* tag 'char-misc-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0
mei: add ABI documentation for fw_status exported through sysfs
mei: clean reset bit before reset
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index ff2755062b44..06ff0a2ec960 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -234,6 +234,18 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable) struct mei_me_hw *hw = to_me_hw(dev); u32 hcsr = mei_hcsr_read(hw); + /* H_RST may be found lit before reset is started, + * for example if preceding reset flow hasn't completed. + * In that case asserting H_RST will be ignored, therefore + * we need to clean H_RST bit to start a successful reset sequence. + */ + if ((hcsr & H_RST) == H_RST) { + dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr); + hcsr &= ~H_RST; + mei_me_reg_write(hw, H_CSR, hcsr); + hcsr = mei_hcsr_read(hw); + } + hcsr |= H_RST | H_IG | H_IS; if (intr_enable) |