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authorMelchior FRANZ <mfranz@aon.at>2015-11-01 19:48:18 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-02-07 08:42:25 +0100
commite882f7158f102ef148a2d96eb4cb50cc88830c87 (patch)
tree773528566b7304cfe94d4f86b90eff690bcf9d0e /drivers/tty/serial/jsm
parenttty: hvc_xen: hide xen_console_remove when unused (diff)
downloadlinux-e882f7158f102ef148a2d96eb4cb50cc88830c87.tar.xz
linux-e882f7158f102ef148a2d96eb4cb50cc88830c87.zip
tty: vt: initialize softcursor_original correctly
add_softcursor() stores the contents of the text buffer position in this variable before drawing the softcursor, whereas hide_softcursor() writes the value back. A value of -1 means that no cursor has been drawn and therefore no character is to be restored. softcursor_original, however, is only implicitly initialized with 0. Therefore, when hide_softcursor is called for the first time (console_init -> con_init -> redraw_screen -> hide_cursor), it wrongly writes 0x0000 in the top left corner of the text buffer. Normally, this is just as black as the rest of the screen (vc_video_erase_char) and can't be seen, but it appears as a black cursor rectangle on non-black backgrounds e.g. with boot option "vt.global_cursor_default=0 vt.color=0xf0". softcursor_original needs to be initialized with -1. Signed-off-by: Melchior FRANZ <mfranz@aon.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/jsm')
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