Andreas Bießmann 16cf48a6d3 register_console: prevent adding the same console twice ... This patch guards the console_drivers list to be corrupted. The for_each_console() macro insist on a strictly forward list ended by NULL: con0->next->con1->next->NULL Without this patch it may happen easily to destroy this list for example by adding 'earlyprintk' twice, especially on embedded devices where the early console is often a single static instance. This will result in the following list: con0->next->con0 This in turn will result in an endless loop in console_unlock() later on by printing the first __log_buf line endlessly. Signed-off-by: Andreas Bießmann <andreas@biessmann.de> Cc: Kay Sievers <kay@vrfy.org> Cc: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-08-05 15:06:46 +08:00
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braille.c	printk: move braille console support into separate braille.[ch] files	2013-07-31 14:41:03 -07:00
braille.h	printk: move braille console support into separate braille.[ch] files	2013-07-31 14:41:03 -07:00
console_cmdline.h	printk: add console_cmdline.h	2013-07-31 14:41:03 -07:00
Makefile	printk: move braille console support into separate braille.[ch] files	2013-07-31 14:41:03 -07:00
printk.c	register_console: prevent adding the same console twice	2013-08-05 15:06:46 +08:00