| From | Ben Hutchings <> | Date | Wed, 28 Feb 2018 15:20:22 +0000 | Subject | [PATCH 3.2 077/140] e1000e: Fix e1000_check_for_copper_link_ich8lan return value. |
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3.2.100-rc1 review patch. If anyone has any objections, please let me know.
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From: Benjamin Poirier <bpoirier@suse.com>
commit 4110e02eb45ea447ec6f5459c9934de0a273fb91 upstream.
e1000e_check_for_copper_link() and e1000_check_for_copper_link_ich8lan() are the two functions that may be assigned to mac.ops.check_for_link when phy.media_type == e1000_media_type_copper. Commit 19110cfbb34d ("e1000e: Separate signaling for link check/link up") changed the meaning of the return value of check_for_link for copper media but only adjusted the first function. This patch adjusts the second function likewise.
Reported-by: Christian Hesse <list@eworm.de> Reported-by: Gabriel C <nix.or.die@gmail.com> Link: https://bugzilla.kernel.org/show_bug.cgi?id=198047 Fixes: 19110cfbb34d ("e1000e: Separate signaling for link check/link up") Signed-off-by: Benjamin Poirier <bpoirier@suse.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Tested-by: Christian Hesse <list@eworm.de> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> [bwh: Backported to 3.2: e1000_check_for_copper_link() has a single return statement for success and error cases, so set ret_val in the link-up case instead of changing that statement.] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/net/ethernet/intel/e1000e/ich8lan.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -657,6 +657,9 @@ out: * Checks to see of the link status of the hardware has changed. If a * change in link status has been detected, then we read the PHY registers * to get the current speed/duplex if link exists. + * + * Returns a negative error code (-E1000_ERR_*) or 0 (link down) or 1 (link + * up). **/ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw) { @@ -672,7 +675,7 @@ static s32 e1000_check_for_copper_link_i * Change or Rx Sequence Error interrupt. */ if (!mac->get_link_status) { - ret_val = 0; + ret_val = 1; goto out; } @@ -761,9 +764,12 @@ static s32 e1000_check_for_copper_link_i * different link partner. */ ret_val = e1000e_config_fc_after_link_up(hw); - if (ret_val) + if (ret_val) { e_dbg("Error configuring flow control\n"); + return ret_val; + } + ret_val = 1; out: return ret_val; }
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