fw_cfg: handle fw_cfg_read_blob() error

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fw_cfg_read_blob() may fail, but does not return error. This may lead
to surprising behaviours, like populating zero file entries (in
register_file() or during read). Return an error if ACPI locking
failed. Also, the following DMA read/write extension will add more
error paths that should be handled appropriately.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Marc-André Lureau 2018-02-28 16:06:10 +01:00 • committed by Michael S. Tsirkin

parent 59ecab182f

commit b1cc4097d1

1 changed files with 22 additions and 10 deletions

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drivers/firmware/qemu_fw_cfg.c

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