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Keep hitting the hardware until it gives us enough ROM

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This commit is contained in:
Richard Hughes 2015-07-01 14:06:28 +01:00
parent 5e330b0f0c
commit 885128a7c8
1 changed files with 27 additions and 0 deletions
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27
src/fu-rom.c
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@ -245,6 +245,7 @@ fu_rom_load_file (FuRom *rom, GFile *file, GCancellable *cancellable, GError **e
gchar *str;
guint hdr_sz = 0;
guint i;
guint number_reads = 0;
gssize sz;
_cleanup_free_ gchar *fn = NULL;
_cleanup_error_free_ GError *error_local = NULL;
@ -287,6 +288,32 @@ fu_rom_load_file (FuRom *rom, GFile *file, GCancellable *cancellable, GError **e
return FALSE;
}
/* ensure we got enough data to fill the buffer */
while (sz < 0x4000) {
gssize sz_chunk;
sz_chunk = g_input_stream_read (priv->stream,
buffer + sz,
block_sz - sz,
cancellable,
error);
if (sz_chunk == 0)
break;
g_debug ("ROM returned 0x%04x bytes, adding 0x%04x...",
(guint) sz, (guint) sz_chunk);
if (sz_chunk < 0)
return FALSE;
sz += sz_chunk;
/* check the firmware isn't serving us small chunks */
if (number_reads++ > 16) {
g_set_error_literal (error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"firmware not fulfilling requests");
return FALSE;
}
}
/* detect signed header and skip to option ROM */
if (memcmp (buffer, "NVGI", 4) == 0)
hdr_sz = GUINT16_FROM_BE (buffer[0x15]);