From d29cc6efb9731a415957b8d0ff16e31729ed6837 Mon Sep 17 00:00:00 2001 From: Dave Olson Date: Fri, 17 Aug 2007 14:42:14 -0700 Subject: [PATCH] IB/ipath: Future proof eeprom checksum code (contents reading) In an earlier change, the amount of data read from the flash was mistakenly limited to the size known to the current driver. This causes problems when the length is increased, and written with the new longer version; the checksum would fail because not enough data was read. Always read the full 128 byte length to prevent this. Signed-off-by: Dave Olson Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_eeprom.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/ipath/ipath_eeprom.c b/drivers/infiniband/hw/ipath/ipath_eeprom.c index b4503e9c1e95..bcfa3ccb555f 100644 --- a/drivers/infiniband/hw/ipath/ipath_eeprom.c +++ b/drivers/infiniband/hw/ipath/ipath_eeprom.c @@ -596,7 +596,11 @@ void ipath_get_eeprom_info(struct ipath_devdata *dd) goto bail; } - len = offsetof(struct ipath_flash, if_future); + /* + * read full flash, not just currently used part, since it may have + * been written with a newer definition + * */ + len = sizeof(struct ipath_flash); buf = vmalloc(len); if (!buf) { ipath_dev_err(dd, "Couldn't allocate memory to read %u " @@ -737,8 +741,10 @@ int ipath_update_eeprom_log(struct ipath_devdata *dd) /* * The quick-check above determined that there is something worthy * of logging, so get current contents and do a more detailed idea. + * read full flash, not just currently used part, since it may have + * been written with a newer definition */ - len = offsetof(struct ipath_flash, if_future); + len = sizeof(struct ipath_flash); buf = vmalloc(len); ret = 1; if (!buf) {