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author | Jiri Slaby <jslaby@suse.cz> | 2021-07-23 09:43:12 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-27 12:17:20 +0200 |
commit | 0524513afe45a4a79f418c0377160b7712cab78a (patch) | |
tree | eab43a3f41c183818029805709a1abbf6625ef21 /drivers/pinctrl | |
parent | 7ccbdcc4d08a6d7041e4849219bbb12ffa45db4c (diff) | |
download | linux-0524513afe45a4a79f418c0377160b7712cab78a.tar.gz linux-0524513afe45a4a79f418c0377160b7712cab78a.tar.bz2 linux-0524513afe45a4a79f418c0377160b7712cab78a.zip |
tty: don't store semi-state into tty drivers
When a tty driver pointer is used as a return value of struct
console's device() hook, don't store a semi-state into global variable
which holds the tty driver. It could mean console::device() would return
a bogus value. This is important esp. after the next patch where we
switch from alloc_tty_driver to tty_alloc_driver. tty_alloc_driver
returns ERR_PTR in case of error and that might have unexpected results
as the code doesn't expect this.
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: Felipe Balbi <balbi@kernel.org>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210723074317.32690-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pinctrl')
0 files changed, 0 insertions, 0 deletions