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dmaengine: bestcomm: fix system boot lockups

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commit adec566b05 upstream.

memset() and memcpy() on an MMIO region like here results in a
lockup at startup on mpc5200 platform (since this first happens
during probing of the ATA and Ethernet drivers). Use memset_io()
and memcpy_toio() instead.

Fixes: 2f9ea1bde0 ("bestcomm: core bestcomm support for Freescale MPC5200")
Cc: stable@vger.kernel.org # v5.14+
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Link: https://lore.kernel.org/r/20211014094012.21286-1-agust@denx.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Anatolij Gustschin 2021-10-14 11:40:12 +02:00 committed by Greg Kroah-Hartman
parent c4cd9e5acc
commit 6a85f01a89
4 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/dma/bestcomm/ata.c
View File

@ -133,7 +133,7 @@ void bcom_ata_reset_bd(struct bcom_task *tsk)
struct bcom_ata_var *var;
/* Reset all BD */
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
tsk->index = 0;
tsk->outdex = 0;

22
drivers/dma/bestcomm/bestcomm.c
View File

@ -95,7 +95,7 @@ bcom_task_alloc(int bd_count, int bd_size, int priv_size)
tsk->bd = bcom_sram_alloc(bd_count * bd_size, 4, &tsk->bd_pa);
if (!tsk->bd)
goto error;
memset(tsk->bd, 0x00, bd_count * bd_size);
memset_io(tsk->bd, 0x00, bd_count * bd_size);
tsk->num_bd = bd_count;
tsk->bd_size = bd_size;
@ -186,16 +186,16 @@ bcom_load_image(int task, u32 *task_image)
inc = bcom_task_inc(task);
/* Clear & copy */
memset(var, 0x00, BCOM_VAR_SIZE);
memset(inc, 0x00, BCOM_INC_SIZE);
memset_io(var, 0x00, BCOM_VAR_SIZE);
memset_io(inc, 0x00, BCOM_INC_SIZE);
desc_src = (u32 *)(hdr + 1);
var_src = desc_src + hdr->desc_size;
inc_src = var_src + hdr->var_size;
memcpy(desc, desc_src, hdr->desc_size * sizeof(u32));
memcpy(var + hdr->first_var, var_src, hdr->var_size * sizeof(u32));
memcpy(inc, inc_src, hdr->inc_size * sizeof(u32));
memcpy_toio(desc, desc_src, hdr->desc_size * sizeof(u32));
memcpy_toio(var + hdr->first_var, var_src, hdr->var_size * sizeof(u32));
memcpy_toio(inc, inc_src, hdr->inc_size * sizeof(u32));
return 0;
}
@ -302,13 +302,13 @@ static int bcom_engine_init(void)
return -ENOMEM;
}
memset(bcom_eng->tdt, 0x00, tdt_size);
memset(bcom_eng->ctx, 0x00, ctx_size);
memset(bcom_eng->var, 0x00, var_size);
memset(bcom_eng->fdt, 0x00, fdt_size);
memset_io(bcom_eng->tdt, 0x00, tdt_size);
memset_io(bcom_eng->ctx, 0x00, ctx_size);
memset_io(bcom_eng->var, 0x00, var_size);
memset_io(bcom_eng->fdt, 0x00, fdt_size);
/* Copy the FDT for the EU#3 */
memcpy(&bcom_eng->fdt[48], fdt_ops, sizeof(fdt_ops));
memcpy_toio(&bcom_eng->fdt[48], fdt_ops, sizeof(fdt_ops));
/* Initialize Task base structure */
for (task=0; task<BCOM_MAX_TASKS; task++)

4
drivers/dma/bestcomm/fec.c
View File

@ -140,7 +140,7 @@ bcom_fec_rx_reset(struct bcom_task *tsk)
tsk->index = 0;
tsk->outdex = 0;
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
/* Configure some stuff */
bcom_set_task_pragma(tsk->tasknum, BCOM_FEC_RX_BD_PRAGMA);
@ -241,7 +241,7 @@ bcom_fec_tx_reset(struct bcom_task *tsk)
tsk->index = 0;
tsk->outdex = 0;
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
/* Configure some stuff */
bcom_set_task_pragma(tsk->tasknum, BCOM_FEC_TX_BD_PRAGMA);

4
drivers/dma/bestcomm/gen_bd.c
View File

@ -142,7 +142,7 @@ bcom_gen_bd_rx_reset(struct bcom_task *tsk)
tsk->index = 0;
tsk->outdex = 0;
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
/* Configure some stuff */
bcom_set_task_pragma(tsk->tasknum, BCOM_GEN_RX_BD_PRAGMA);
@ -226,7 +226,7 @@ bcom_gen_bd_tx_reset(struct bcom_task *tsk)
tsk->index = 0;
tsk->outdex = 0;
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
memset_io(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
/* Configure some stuff */
bcom_set_task_pragma(tsk->tasknum, BCOM_GEN_TX_BD_PRAGMA);