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authorDavid Ertman2014-03-25 04:27:55 +0000
committerJeff Kirsher2014-03-31 15:47:59 -0700
commitb20a774495671f037e7160ea2ce8789af6b61533 (patch)
tree371756a58112278899750aee8a94639902591062 /fs/pnode.h
parent0b70195e0c3206103be991e196c26fcf168d0334 (diff)
e1000e: Fix no connectivity when driver loaded with cable out
In commit da1e2046e5, the flow for enabling/disabling an Si errata workaround (e1000_lv_jumbo_workaround_ich8lan) was changed to fix a problem with iAMT connections dropping on interface down with jumbo frames set. Part of this change was to move the function call disabling the workaround to e1000e_down() from the e1000_setup_rctl() function. The mechanic for disabling of this workaround involves writing several MAC and PHY registers back to hardware defaults. After this commit, when the driver is loaded with the cable out, the PHY registers are not programmed with the correct default values. This causes the device to be capable of transmitting packets, but is unable to recieve them until this workaround is called. The flow of e1000e's open code relies upon calling the above workaround to expicitly program these registers either with jumbo frame appropriate settings or h/w defaults on 82579 and newer hardware. Fix this issue by adding logic to e1000_setup_rctl() that not only calls e1000_lv_jumbo_workaround_ich8lan() when jumbo frames are set, to enable the workaround, but also calls this function to explicitly disable the workaround in the case that jumbo frames are not set. Signed-off-by: Dave Ertman <davidx.m.ertman@intel.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'fs/pnode.h')
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