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| author | Jeremy Linton <jeremy.linton@arm.com> | 2015-08-19 11:46:42 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-20 14:36:25 -0700 |
| commit | 2f710a3a8089c12dfe3c0cf04bb0a3dee3dea019 (patch) | |
| tree | b02f63ac4753c1b56296de90dca2e000169e0ff5 /drivers/base | |
| parent | ef09242f3997f5fa063bcfa918d3ce4c4485376c (diff) | |
| download | linux-2f710a3a8089c12dfe3c0cf04bb0a3dee3dea019.tar.bz2 | |
device property: Add ETH_ALEN check, update comments.
This patch adds MAC address length check back into
the device_get_mac_addr() function before calling
is_valid_ether_addr() similar to the way the OF
routine does it.
Update the comments for the two new functions.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 2e8cd147f02d..4c2082899322 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -537,7 +537,7 @@ bool device_dma_is_coherent(struct device *dev) EXPORT_SYMBOL_GPL(device_dma_is_coherent); /** - * device_get_phy_mode - Get phy mode for given device_node + * device_get_phy_mode - Get phy mode for given device * @dev: Pointer to the given device * * The function gets phy interface string from property 'phy-mode' or @@ -570,13 +570,18 @@ static void *device_get_mac_addr(struct device *dev, { int ret = device_property_read_u8_array(dev, name, addr, alen); - if (ret == 0 && is_valid_ether_addr(addr)) + if (ret == 0 && alen == ETH_ALEN && is_valid_ether_addr(addr)) return addr; return NULL; } /** - * Search the device tree for the best MAC address to use. 'mac-address' is + * device_get_mac_address - Get the MAC for a given device + * @dev: Pointer to the device + * @addr: Address of buffer to store the MAC in + * @alen: Length of the buffer pointed to by addr, should be ETH_ALEN + * + * Search the firmware node for the best MAC address to use. 'mac-address' is * checked first, because that is supposed to contain to "most recent" MAC * address. If that isn't set, then 'local-mac-address' is checked next, * because that is the default address. If that isn't set, then the obsolete @@ -587,11 +592,11 @@ static void *device_get_mac_addr(struct device *dev, * MAC address. * * All-zero MAC addresses are rejected, because those could be properties that - * exist in the device tree, but were not set by U-Boot. For example, the - * DTS could define 'mac-address' and 'local-mac-address', with zero MAC - * addresses. Some older U-Boots only initialized 'local-mac-address'. In - * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists - * but is all zeros. + * exist in the firmware tables, but were not updated by the firmware. For + * example, the DTS could define 'mac-address' and 'local-mac-address', with + * zero MAC addresses. Some older U-Boots only initialized 'local-mac-address'. + * In this case, the real MAC is in 'local-mac-address', and 'mac-address' + * exists but is all zeros. */ void *device_get_mac_address(struct device *dev, char *addr, int alen) { |