diff options
| author | Finn Thain <[email protected]> | 2020-06-28 04:23:12 +0000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2020-07-26 13:34:25 +0000 |
| commit | 624cf5b538b507293ec761797bd8ce0702fefe64 (patch) | |
| tree | c07f0cc27a6863a4c29183e088c5d5b858513d71 /arch/powerpc/lib/code-patching.c | |
| parent | macintosh/via-macii: Remove read_done state (diff) | |
| download | kernel-624cf5b538b507293ec761797bd8ce0702fefe64.tar.gz kernel-624cf5b538b507293ec761797bd8ce0702fefe64.zip | |
macintosh/via-macii: Handle poll replies correctly
Userspace applications may use /dev/adb to send Talk requests. Such
requests always have req->reply_expected == 1. The same is true of Talk
requests sent by the kernel, except for poll requests queued internally
by the via-macii driver. Those requests have req->reply_expected == 0.
Consequently, poll reply packets get treated like autopoll reply packets.
(It doesn't make sense to try to distinguish them.) Always enter 'reading'
state after a poll request, so that the reply gets collected and passed
to adb_input(), and none go missing.
All Talk replies passed to adb_input() come from polling or autopolling,
so call adb_input() with the autopoll parameter set to 1.
Fixes: d95fd5fce88f0 ("m68k: Mac II ADB fixes") # v5.0+
Signed-off-by: Finn Thain <[email protected]>
Tested-by: Stan Johnson <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/754cddfa045e5bfa53e5da199831de02e7d2f27f.1593318192.git.fthain@telegraphics.com.au
Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
0 files changed, 0 insertions, 0 deletions