ice: cleanup vf_id signedness

The vf_id variable is dealt with in the code in inconsistent
ways of sign usage, preventing compilation with -Werror=sign-compare.
Fix this problem in the code by always treating vf_id as unsigned, since
there are no valid values of vf_id that are negative.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice.h

@@ -371,7 +371,7 @@ struct ice_pf {
 	struct ice_sw *first_sw;	/* first switch created by firmware */
 	/* Virtchnl/SR-IOV config info */
 	struct ice_vf *vf;
-	int num_alloc_vfs;		/* actual number of VFs allocated */
+	u16 num_alloc_vfs;		/* actual number of VFs allocated */
 	u16 num_vfs_supported;		/* num VFs supported for this PF */
 	u16 num_qps_per_vf;
 	u16 num_msix_per_vf;

drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c

@@ -10,10 +10,11 @@
  * @pf: pointer to the PF structure
  * @vf_id: the ID of the VF to check
  */
-static int ice_validate_vf_id(struct ice_pf *pf, int vf_id)
+static int ice_validate_vf_id(struct ice_pf *pf, u16 vf_id)
 {
+	/* vf_id range is only valid for 0-255, and should always be unsigned */
 	if (vf_id >= pf->num_alloc_vfs) {
-		dev_err(ice_pf_to_dev(pf), "Invalid VF ID: %d\n", vf_id);
+		dev_err(ice_pf_to_dev(pf), "Invalid VF ID: %u\n", vf_id);
 		return -EINVAL;
 	}
 	return 0;
@@ -27,7 +28,7 @@ static int ice_validate_vf_id(struct ice_pf *pf, int vf_id)
 static int ice_check_vf_init(struct ice_pf *pf, struct ice_vf *vf)
 {
 	if (!test_bit(ICE_VF_STATE_INIT, vf->vf_states)) {
-		dev_err(ice_pf_to_dev(pf), "VF ID: %d in reset. Try again.\n",
+		dev_err(ice_pf_to_dev(pf), "VF ID: %u in reset. Try again.\n",
 			vf->vf_id);
 		return -EBUSY;
 	}
@@ -368,7 +369,7 @@ void ice_free_vfs(struct ice_pf *pf)
 	 * before this function ever gets called.
 	 */
 	if (!pci_vfs_assigned(pf->pdev)) {
-		int vf_id;
+		unsigned int vf_id;
 
 		/* Acknowledge VFLR for all VFs. Without this, VFs will fail to
 		 * work correctly when SR-IOV gets re-enabled.
@@ -399,9 +400,9 @@ static void ice_trigger_vf_reset(struct ice_vf *vf, bool is_vflr, bool is_pfr)
 {
 	struct ice_pf *pf = vf->pf;
 	u32 reg, reg_idx, bit_idx;
+	unsigned int vf_abs_id, i;
 	struct device *dev;
 	struct ice_hw *hw;
-	int vf_abs_id, i;
 
 	dev = ice_pf_to_dev(pf);
 	hw = &pf->hw;
@@ -449,7 +450,7 @@ static void ice_trigger_vf_reset(struct ice_vf *vf, bool is_vflr, bool is_pfr)
 		if ((reg & VF_TRANS_PENDING_M) == 0)
 			break;
 
-		dev_err(dev, "VF %d PCI transactions stuck\n", vf->vf_id);
+		dev_err(dev, "VF %u PCI transactions stuck\n", vf->vf_id);
 		udelay(ICE_PCI_CIAD_WAIT_DELAY_US);
 	}
 }
@@ -1515,7 +1516,7 @@ int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)
 void ice_process_vflr_event(struct ice_pf *pf)
 {
 	struct ice_hw *hw = &pf->hw;
-	int vf_id;
+	unsigned int vf_id;
 	u32 reg;
 
 	if (!test_and_clear_bit(__ICE_VFLR_EVENT_PENDING, pf->state) ||
@@ -1556,7 +1557,7 @@ static void ice_vc_reset_vf(struct ice_vf *vf)
  */
 static struct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)
 {
-	int vf_id;
+	unsigned int vf_id;
 
 	ice_for_each_vf(pf, vf_id) {
 		struct ice_vf *vf = &pf->vf[vf_id];

drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h

@@ -64,7 +64,7 @@ struct ice_mdd_vf_events {
 struct ice_vf {
 	struct ice_pf *pf;
 
-	s16 vf_id;			/* VF ID in the PF space */
+	u16 vf_id;			/* VF ID in the PF space */
 	u16 lan_vsi_idx;		/* index into PF struct */
 	/* first vector index of this VF in the PF space */
 	int first_vector_idx;