[PATCH v3 04/27] block: remove memset after dma_alloc_coherent

From: Fuqian Huang
Date: Tue Jul 02 2019 - 03:57:16 EST


In commit 518a2f1925c3
("dma-mapping: zero memory returned from dma_alloc_*"),
dma_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx>
---
Changes in v3:
- Use actual commit rather than the merge commit in the commit message

drivers/block/mtip32xx/mtip32xx.c | 5 -----
drivers/block/skd_main.c | 1 -
2 files changed, 6 deletions(-)

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index a14b09ab3a41..964f78cfffa0 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -1577,7 +1577,6 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
ATA_SECT_SIZE * xfer_sz);
return -ENOMEM;
}
- memset(buf, 0, ATA_SECT_SIZE * xfer_sz);
}

/* Build the FIS. */
@@ -2776,7 +2775,6 @@ static int mtip_dma_alloc(struct driver_data *dd)
&port->block1_dma, GFP_KERNEL);
if (!port->block1)
return -ENOMEM;
- memset(port->block1, 0, BLOCK_DMA_ALLOC_SZ);

/* Allocate dma memory for command list */
port->command_list =
@@ -2789,7 +2787,6 @@ static int mtip_dma_alloc(struct driver_data *dd)
port->block1_dma = 0;
return -ENOMEM;
}
- memset(port->command_list, 0, AHCI_CMD_TBL_SZ);

/* Setup all pointers into first DMA region */
port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET;
@@ -3529,8 +3526,6 @@ static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
if (!cmd->command)
return -ENOMEM;

- memset(cmd->command, 0, CMD_DMA_ALLOC_SZ);
-
sg_init_table(cmd->sg, MTIP_MAX_SG);
return 0;
}
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index c479235862e5..51569c199a6c 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -2694,7 +2694,6 @@ static int skd_cons_skmsg(struct skd_device *skdev)
(FIT_QCMD_ALIGN - 1),
"not aligned: msg_buf %p mb_dma_address %pad\n",
skmsg->msg_buf, &skmsg->mb_dma_address);
- memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES);
}

err_out:
--
2.11.0