Merge tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/fwctl/fwctl

Pull fwctl updates from Jason Gunthorpe:

 - Fix mismatched kvalloc() kfree() on error paths

 - Remove NOP dev_err_probe(), shouldn't print on error paths anyhow

 - For mlx5 permit:
    MLX5_CMD_OP_MODIFY_CONG_STATUS
    MLX5_CMD_OP_QUERY_ADJACENT_FUNCTIONS_ID
    MLX5_CMD_OP_DELEGATE_VHCA_MANAGEMENT
    MLX5_CMD_OP_QUERY_DELEGATED_VHCA

 - Use memdup_user in pds

* tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/fwctl/fwctl:
  pds_fwctl: Replace kzalloc + copy_from_user with memdup_user in pdsfc_fw_rpc
  fwctl/mlx5: Add Adjacent function query commands and their scope
  fwctl/mlx5: Allow MODIFY_CONG_STATUS command
  pds_fwctl: Remove the use of dev_err_probe()
  fwctl/mlx5: Fix memory alloc/free in mlx5ctl_fw_rpc()

Author: torvalds

drivers/fwctl/mlx5/main.c

@@ -58,6 +58,9 @@ enum {
 	MLX5_CMD_OP_QUERY_DC_CNAK_TRACE = 0x716,
 	MLX5_CMD_OP_QUERY_NVMF_BACKEND_CONTROLLER = 0x722,
 	MLX5_CMD_OP_QUERY_NVMF_NAMESPACE_CONTEXT = 0x728,
+	MLX5_CMD_OP_QUERY_ADJACENT_FUNCTIONS_ID = 0x730,
+	MLX5_CMD_OP_DELEGATE_VHCA_MANAGEMENT = 0x731,
+	MLX5_CMD_OP_QUERY_DELEGATED_VHCA = 0x732,
 	MLX5_CMD_OP_QUERY_BURST_SIZE = 0x813,
 	MLX5_CMD_OP_QUERY_DIAGNOSTIC_PARAMS = 0x819,
 	MLX5_CMD_OP_SET_DIAGNOSTIC_PARAMS = 0x820,
@@ -188,6 +191,7 @@ static bool mlx5ctl_validate_rpc(const void *in, enum fwctl_rpc_scope scope)
 	 * filter commands manually for now.
 	 */
 	switch (opcode) {
+	case MLX5_CMD_OP_MODIFY_CONG_STATUS:
 	case MLX5_CMD_OP_POSTPONE_CONNECTED_QP_TIMEOUT:
 	case MLX5_CMD_OP_QUERY_ADAPTER:
 	case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
@@ -196,6 +200,7 @@ static bool mlx5ctl_validate_rpc(const void *in, enum fwctl_rpc_scope scope)
 	case MLX5_CMD_OP_QUERY_OTHER_HCA_CAP:
 	case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
 	case MLX5_CMD_OPCODE_QUERY_VUID:
+	case MLX5_CMD_OP_DELEGATE_VHCA_MANAGEMENT:
 	/*
 	 * FW limits SET_HCA_CAP on the tools UID to only the other function
 	 * mode which is used for function pre-configuration
@@ -281,6 +286,8 @@ static bool mlx5ctl_validate_rpc(const void *in, enum fwctl_rpc_scope scope)
 	case MLX5_CMD_OP_QUERY_XRQ:
 	case MLX5_CMD_OP_USER_QUERY_XRQ_DC_PARAMS_ENTRY:
 	case MLX5_CMD_OP_USER_QUERY_XRQ_ERROR_PARAMS:
+	case MLX5_CMD_OP_QUERY_ADJACENT_FUNCTIONS_ID:
+	case MLX5_CMD_OP_QUERY_DELEGATED_VHCA:
 		return scope >= FWCTL_RPC_DEBUG_READ_ONLY;
 
 	case MLX5_CMD_OP_SET_DIAGNOSTIC_PARAMS:
@@ -345,7 +352,7 @@ static void *mlx5ctl_fw_rpc(struct fwctl_uctx *uctx, enum fwctl_rpc_scope scope,
 	 */
 	if (ret && ret != -EREMOTEIO) {
 		if (rpc_out != rpc_in)
-			kfree(rpc_out);
+			kvfree(rpc_out);
 		return ERR_PTR(ret);
 	}
 	return rpc_out;

drivers/fwctl/pds/main.c

@@ -6,6 +6,7 @@
 #include <linux/pci.h>
 #include <linux/vmalloc.h>
 #include <linux/bitfield.h>
+#include <linux/string.h>
 
 #include <uapi/fwctl/fwctl.h>
 #include <uapi/fwctl/pds.h>
@@ -366,18 +367,10 @@ static void *pdsfc_fw_rpc(struct fwctl_uctx *uctx, enum fwctl_rpc_scope scope,
 		return ERR_PTR(err);
 
 	if (rpc->in.len > 0) {
-		in_payload = kzalloc(rpc->in.len, GFP_KERNEL);
-		if (!in_payload) {
-			dev_err(dev, "Failed to allocate in_payload\n");
-			err = -ENOMEM;
-			goto err_out;
-		}
-
-		if (copy_from_user(in_payload, u64_to_user_ptr(rpc->in.payload),
-				   rpc->in.len)) {
+		in_payload = memdup_user(u64_to_user_ptr(rpc->in.payload), rpc->in.len);
+		if (IS_ERR(in_payload)) {
 			dev_dbg(dev, "Failed to copy in_payload from user\n");
-			err = -EFAULT;
-			goto err_in_payload;
+			return in_payload;
 		}
 
 		in_payload_dma_addr = dma_map_single(dev->parent, in_payload,
@@ -453,7 +446,6 @@ static void *pdsfc_fw_rpc(struct fwctl_uctx *uctx, enum fwctl_rpc_scope scope,
 				 rpc->in.len, DMA_TO_DEVICE);
 err_in_payload:
 	kfree(in_payload);
-err_out:
 	if (err)
 		return ERR_PTR(err);
 
@@ -481,7 +473,7 @@ static int pdsfc_probe(struct auxiliary_device *adev,
 	pdsfc = fwctl_alloc_device(&padev->vf_pdev->dev, &pdsfc_ops,
 				   struct pdsfc_dev, fwctl);
 	if (!pdsfc)
-		return dev_err_probe(dev, -ENOMEM, "Failed to allocate fwctl device struct\n");
+		return -ENOMEM;
 	pdsfc->padev = padev;
 
 	err = pdsfc_identify(pdsfc);