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authorIvo van Doorn <ivdoorn@gmail.com>2009-01-28 00:33:47 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-02-09 15:03:35 -0500
commit0cbe0064614ace61e08618948f82c6d525e75017 (patch)
treedc6f68d5da42ab6ada2fab2bd4e5fecfa6f1ed8c /drivers/net/wireless/rt2x00/rt2x00firmware.c
parenta2c9b652a12a550d3d8509e9bae43bac396c5076 (diff)
rt2x00: Validate firmware in driver
The get_firmware_crc() callback function isn't flexible enough when dealing with multiple firmware versions. It might in some cases be possible that the firmware file contains multiple CRC checksums. Create the check_firmware() callback function where the driver has complete freedom in how to validate the firmware. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00firmware.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00firmware.c27
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00firmware.c b/drivers/net/wireless/rt2x00/rt2x00firmware.c
index 2a7e8bc0016..d2deea2f267 100644
--- a/drivers/net/wireless/rt2x00/rt2x00firmware.c
+++ b/drivers/net/wireless/rt2x00/rt2x00firmware.c
@@ -35,7 +35,6 @@ static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
const struct firmware *fw;
char *fw_name;
int retval;
- u16 crc;
/*
* Read correct firmware from harddisk.
@@ -61,16 +60,26 @@ static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
return -ENOENT;
}
- crc = rt2x00dev->ops->lib->get_firmware_crc(fw->data, fw->size);
- if (crc != (fw->data[fw->size - 2] << 8 | fw->data[fw->size - 1])) {
- ERROR(rt2x00dev, "Firmware checksum error.\n");
- retval = -ENOENT;
- goto exit;
- }
-
INFO(rt2x00dev, "Firmware detected - version: %d.%d.\n",
fw->data[fw->size - 4], fw->data[fw->size - 3]);
+ retval = rt2x00dev->ops->lib->check_firmware(rt2x00dev, fw->data, fw->size);
+ switch (retval) {
+ case FW_OK:
+ break;
+ case FW_BAD_CRC:
+ ERROR(rt2x00dev, "Firmware checksum error.\n");
+ goto exit;
+ case FW_BAD_LENGTH:
+ ERROR(rt2x00dev,
+ "Invalid firmware file length (len=%zu)\n", fw->size);
+ goto exit;
+ case FW_BAD_VERSION:
+ ERROR(rt2x00dev,
+ "Current firmware does not support detected chipset.\n");
+ goto exit;
+ };
+
rt2x00dev->fw = fw;
return 0;
@@ -78,7 +87,7 @@ static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
exit:
release_firmware(fw);
- return retval;
+ return -ENOENT;
}
int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)