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Staging: android: ram_console: Disable ECC when early init is enabled and validate buffer size 

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arve Hjønnevåg 2009-01-30 20:21:09 -08:00 committed by Greg Kroah-Hartman
parent 07f269862a
commit 5701c0519b
2 changed files with 15 additions and 0 deletions
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1
drivers/staging/android/Kconfig
View File

@ -27,6 +27,7 @@ menuconfig ANDROID_RAM_CONSOLE_ERROR_CORRECTION
bool "Android RAM Console Enable error correction"
default n
depends on ANDROID_RAM_CONSOLE
depends on !ANDROID_RAM_CONSOLE_EARLY_INIT
select REED_SOLOMON
select REED_SOLOMON_ENC8
select REED_SOLOMON_DEC8

14
drivers/staging/android/ram_console.c
View File

@ -224,9 +224,23 @@ static int __init ram_console_init(struct ram_console_buffer *buffer,
ram_console_buffer_size =
buffer_size - sizeof(struct ram_console_buffer);
if (ram_console_buffer_size > buffer_size) {
pr_err("ram_console: buffer %p, invalid size %d, datasize %d\n",
buffer, buffer_size, ram_console_buffer_size);
return 0;
}
#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
ram_console_buffer_size -= (DIV_ROUND_UP(ram_console_buffer_size,
ECC_BLOCK_SIZE) + 1) * ECC_SIZE;
if (ram_console_buffer_size > buffer_size) {
pr_err("ram_console: buffer %p, invalid size %d, "
"non-ecc datasize %d\n",
buffer, buffer_size, ram_console_buffer_size);
return 0;
}
ram_console_par_buffer = buffer->data + ram_console_buffer_size;