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ixgbe: force unlock on timeout
The semaphore can be in locked state upon driver load, particularly on 82598 if a machine is rebooted due to panic and the semaphore was acquired just prior to the panic. This patch unlocks the semaphore if it times out. Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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@ -1189,6 +1189,28 @@ static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw)
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udelay(50);
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}
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if (i == timeout) {
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hw_dbg(hw, "Driver can't access the Eeprom - SMBI Semaphore "
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"not granted.\n");
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/*
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* this release is particularly important because our attempts
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* above to get the semaphore may have succeeded, and if there
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* was a timeout, we should unconditionally clear the semaphore
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* bits to free the driver to make progress
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*/
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ixgbe_release_eeprom_semaphore(hw);
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udelay(50);
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/*
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* one last try
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* If the SMBI bit is 0 when we read it, then the bit will be
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* set and we have the semaphore
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*/
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swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
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if (!(swsm & IXGBE_SWSM_SMBI))
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status = 0;
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}
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/* Now get the semaphore between SW/FW through the SWESMBI bit */
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if (status == 0) {
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for (i = 0; i < timeout; i++) {
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