kernel/linux.git/drivers/firmware/google/coreboot_table.c, branch v4.19.77

firmware: coreboot: Unmap ioregion after device population

2018-11-13T19:08:37+00:00

[ Upstream commit 20edec388277b62ddfddb8b2b376a937a2cd6d1b ] Both callers of coreboot_table_init() ioremap the pointer that comes in but they don't unmap the memory on failure. Both of them also fail probe immediately with the return value of coreboot_table_init(), leaking a mapping when it fails. The mapping isn't necessary at all after devices are populated either, so we can just drop the mapping here when we exit the function. Let's do that to simplify the code a bit and plug the leak. Cc: Wei-Ning Huang Cc: Julius Werner Cc: Brian Norris Cc: Samuel Holland Fixes: 570d30c2823f ("firmware: coreboot: Expose the coreboot table as a bus") Signed-off-by: Stephen Boyd Reviewed-by: Julius Werner Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

firmware: coreboot: Remove unused coreboot_table_find

2018-04-23T11:37:19+00:00

Now that all users of the coreboot_table_find function have been updated to hang off the coreboot table bus instead, remove it. Signed-off-by: Samuel Holland Signed-off-by: Greg Kroah-Hartman

firmware: coreboot: Expose the coreboot table as a bus

2018-04-23T11:37:19+00:00

This simplifies creating device drivers for hardware or information described in the coreboot table. It also avoids needing to search through the table every time a driver is loaded. Signed-off-by: Samuel Holland Signed-off-by: Greg Kroah-Hartman

firmware: google memconsole: Add coreboot support

2017-04-08T16:05:36+00:00

Coreboot (http://www.coreboot.org) allows to save the firmware console output in a memory buffer. With this patch, the address of this memory buffer is obtained from coreboot tables on x86 chromebook devices declaring an ACPI device with name matching GOOGCB00 or BOOT0000. If the memconsole-coreboot driver is able to find the coreboot table, the memconsole driver sets the cbmem_console address and initializes the memconsole sysfs entries. The coreboot_table-acpi driver is responsible for setting the address of the coreboot table header when probed. If this address is not yet set when memconsole-coreboot is probed, then the probe is deferred by returning -EPROBE_DEFER. This patch is a rework/split/merge of patches from the chromeos v4.4 kernel tree originally authored by: Vadim Bendebury Wei-Ning Huang Yuji Sasaki Duncan Laurie Julius Werner Brian Norris Signed-off-by: Thierry Escande Signed-off-by: Greg Kroah-Hartman