From: Johannes Berg <johannes.b...@intel.com>
Instead of using a union and hard-coding the size difference,
declare both command structs properly, use a union on the
stack to build them and the right sizeof() for the size.
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
Signed-off-by: Luca Coelho <luciano.coe...@intel.com>
---
drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h | 29 +++++++++++++++++++------
drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 19 +++++++++-------
2 files changed, 33 insertions(+), 15 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
index 69f3065ba600..a1cce18460bb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
@@ -508,7 +508,26 @@ struct iwl_nvm_access_cmd {
#define NUM_OF_FW_PAGING_BLOCKS 33 /* 32 for data and 1 block for CSS */
-/*
+/**
+ * struct iwl_fw_paging_cmd_v1 - paging layout
+ *
+ * (FW_PAGING_BLOCK_CMD = 0x4f)
+ *
+ * Send to FW the paging layout in the driver.
+ *
+ * @flags: various flags for the command
+ * @block_size: the block size in powers of 2
+ * @block_num: number of blocks specified in the command.
+ * @device_phy_addr: virtual addresses from device side
+ */
+struct iwl_fw_paging_cmd_v1 {
+ __le32 flags;
+ __le32 block_size;
+ __le32 block_num;
+ __le32 device_phy_addr[NUM_OF_FW_PAGING_BLOCKS];
+} __packed; /* FW_PAGING_BLOCK_CMD_API_S_VER_1 */
+
+/**
* struct iwl_fw_paging_cmd - paging layout
*
* (FW_PAGING_BLOCK_CMD = 0x4f)
@@ -519,16 +538,12 @@ struct iwl_nvm_access_cmd {
* @block_size: the block size in powers of 2
* @block_num: number of blocks specified in the command.
* @device_phy_addr: virtual addresses from device side
- * 32 bit address for API version 1, 64 bit address for API version 2.
-*/
+ */
struct iwl_fw_paging_cmd {
__le32 flags;
__le32 block_size;
__le32 block_num;
- union {
- __le32 addr32[NUM_OF_FW_PAGING_BLOCKS];
- __le64 addr64[NUM_OF_FW_PAGING_BLOCKS];
- } device_phy_addr;
+ __le64 device_phy_addr[NUM_OF_FW_PAGING_BLOCKS];
} __packed; /* FW_PAGING_BLOCK_CMD_API_S_VER_2 */
/*
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index a8804bc979fe..8bdeb7c891e9 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -384,20 +384,23 @@ static int iwl_save_fw_paging(struct iwl_mvm *mvm,
/* send paging cmd to FW in case CPU2 has paging image */
static int iwl_send_paging_cmd(struct iwl_mvm *mvm, const struct fw_img *fw)
{
- struct iwl_fw_paging_cmd paging_cmd = {
- .flags =
+ union {
+ struct iwl_fw_paging_cmd v2;
+ struct iwl_fw_paging_cmd_v1 v1;
+ } paging_cmd = {
+ .v2.flags =
cpu_to_le32(PAGING_CMD_IS_SECURED |
PAGING_CMD_IS_ENABLED |
(mvm->num_of_pages_in_last_blk <<
PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)),
- .block_size = cpu_to_le32(BLOCK_2_EXP_SIZE),
- .block_num = cpu_to_le32(mvm->num_of_paging_blk),
+ .v2.block_size = cpu_to_le32(BLOCK_2_EXP_SIZE),
+ .v2.block_num = cpu_to_le32(mvm->num_of_paging_blk),
};
- int blk_idx, size = sizeof(paging_cmd);
+ int blk_idx, size = sizeof(paging_cmd.v2);
/* A bit hard coded - but this is the old API and will be deprecated */
if (!iwl_mvm_has_new_tx_api(mvm))
- size -= NUM_OF_FW_PAGING_BLOCKS * 4;
+ size = sizeof(paging_cmd.v1);
/* loop for for all paging blocks + CSS block */
for (blk_idx = 0; blk_idx < mvm->num_of_paging_blk + 1; blk_idx++) {
@@ -408,11 +411,11 @@ static int iwl_send_paging_cmd(struct iwl_mvm *mvm, const
struct fw_img *fw)
if (iwl_mvm_has_new_tx_api(mvm)) {
__le64 phy_addr = cpu_to_le64(addr);
- paging_cmd.device_phy_addr.addr64[blk_idx] = phy_addr;
+ paging_cmd.v2.device_phy_addr[blk_idx] = phy_addr;
} else {
__le32 phy_addr = cpu_to_le32(addr);
- paging_cmd.device_phy_addr.addr32[blk_idx] = phy_addr;
+ paging_cmd.v1.device_phy_addr[blk_idx] = phy_addr;
}
}
--
2.11.0
