net/ice/base: reset capabilities before parsing

The capability flags used to report whether an NVM component has
a pending update are stored as simple booleans. If ice_parse_caps finds
the relevant capability then the boolean is set to true.

If the capability is not provided by firmware, then the boolean value
will be left alone. This works during initialization because the
capabilities structure is zero-initialized.

However, this does not work if capabilities are updated by calling
ice_get_caps again after driver load. For example, consider if firmware
had a pending update, and then an EMPR was triggered. The update will
complete, and firmware will no longer report these capabilities.

However, the device driver will have already set the pending flags.
After an EMPR, new capabilities are read. However, because the pending
flags in the dev_caps.common_cap structure have already been set, they
will remain true.

Fix this by clearing the capabilities structures in ice_parse_caps
before processing any capabilities.

This ensures that the capabilities structure will always be refreshed to
match the state of the device or function capabilities reported by
firmware.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Qiming Yang <qiming.yang@intel.com>

diff --git a/drivers/net/ice/base/ice_common.c b/drivers/net/ice/base/ice_common.c
index e1181a1..e2e7f11 100644 (file)
--- a/drivers/net/ice/base/ice_common.c
+++ b/drivers/net/ice/base/ice_common.c
@@ -1828,10 +1828,16 @@ ice_parse_caps(struct ice_hw *hw, void *buf, u32 cap_count,
        if (opc == ice_aqc_opc_list_dev_caps) {
                dev_p = &hw->dev_caps;
                caps = &dev_p->common_cap;
+
+               ice_memset(dev_p, 0, sizeof(*dev_p), ICE_NONDMA_MEM);
+
                prefix = "dev cap";
        } else if (opc == ice_aqc_opc_list_func_caps) {
                func_p = &hw->func_caps;
                caps = &func_p->common_cap;
+
+               ice_memset(func_p, 0, sizeof(*func_p), ICE_NONDMA_MEM);
+
                prefix = "func cap";
        } else {
                ice_debug(hw, ICE_DBG_INIT, "wrong opcode\n");