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| author | David S. Miller <davem@davemloft.net> | 2010-01-19 11:43:42 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-19 11:43:42 -0800 |
| commit | 6373464288cab09bc641be301d8d30fc9f64ba71 (patch) | |
| tree | c1bc92dc630aa15da2e12bc0d09c92169817a702 /drivers/net/wireless/ath/ath5k/eeprom.c | |
| parent | 6d955180b2f9ccff444df06265160868cabb289a (diff) | |
| parent | 730dd70549e0ec755dd55615ba5cfc38a482a947 (diff) | |
| download | kernel_samsung_smdk4412-6373464288cab09bc641be301d8d30fc9f64ba71.zip kernel_samsung_smdk4412-6373464288cab09bc641be301d8d30fc9f64ba71.tar.gz kernel_samsung_smdk4412-6373464288cab09bc641be301d8d30fc9f64ba71.tar.bz2 | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
Conflicts:
drivers/net/wireless/iwlwifi/iwl-core.h
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/eeprom.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/eeprom.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath5k/eeprom.c b/drivers/net/wireless/ath/ath5k/eeprom.c index 5d1c867..6a3f4da 100644 --- a/drivers/net/wireless/ath/ath5k/eeprom.c +++ b/drivers/net/wireless/ath/ath5k/eeprom.c @@ -97,7 +97,7 @@ ath5k_eeprom_init_header(struct ath5k_hw *ah) struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; int ret; u16 val; - u32 cksum, offset; + u32 cksum, offset, eep_max = AR5K_EEPROM_INFO_MAX; /* * Read values from EEPROM and store them in the capability structure @@ -116,12 +116,38 @@ ath5k_eeprom_init_header(struct ath5k_hw *ah) * Validate the checksum of the EEPROM date. There are some * devices with invalid EEPROMs. */ - for (cksum = 0, offset = 0; offset < AR5K_EEPROM_INFO_MAX; offset++) { + AR5K_EEPROM_READ(AR5K_EEPROM_SIZE_UPPER, val); + if (val) { + eep_max = (val & AR5K_EEPROM_SIZE_UPPER_MASK) << + AR5K_EEPROM_SIZE_ENDLOC_SHIFT; + AR5K_EEPROM_READ(AR5K_EEPROM_SIZE_LOWER, val); + eep_max = (eep_max | val) - AR5K_EEPROM_INFO_BASE; + + /* + * Fail safe check to prevent stupid loops due + * to busted EEPROMs. XXX: This value is likely too + * big still, waiting on a better value. + */ + if (eep_max > (3 * AR5K_EEPROM_INFO_MAX)) { + ATH5K_ERR(ah->ah_sc, "Invalid max custom EEPROM size: " + "%d (0x%04x) max expected: %d (0x%04x)\n", + eep_max, eep_max, + 3 * AR5K_EEPROM_INFO_MAX, + 3 * AR5K_EEPROM_INFO_MAX); + return -EIO; + } + } + + for (cksum = 0, offset = 0; offset < eep_max; offset++) { AR5K_EEPROM_READ(AR5K_EEPROM_INFO(offset), val); cksum ^= val; } if (cksum != AR5K_EEPROM_INFO_CKSUM) { - ATH5K_ERR(ah->ah_sc, "Invalid EEPROM checksum 0x%04x\n", cksum); + ATH5K_ERR(ah->ah_sc, "Invalid EEPROM " + "checksum: 0x%04x eep_max: 0x%04x (%s)\n", + cksum, eep_max, + eep_max == AR5K_EEPROM_INFO_MAX ? + "default size" : "custom size"); return -EIO; } |